CN105384180A - YB molecular sieve, preparation method and applications thereof, diesel oil hydrogenation modification catalyst carrier and applications thereof - Google Patents
YB molecular sieve, preparation method and applications thereof, diesel oil hydrogenation modification catalyst carrier and applications thereof Download PDFInfo
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Abstract
The present invention provides a YB molecular sieve, a preparation method and applications thereof. The method comprises: (1) mixing a Y type molecular sieve and a beta type molecular sieve, soaking in a water-containing solvent, separating a solid from the soaked material, drying, and calcining to obtain a first solid; (2) carrying out contact of the first solid and an acidic solution, separating a solid from the contacting material, and drying to obtain a second solid; and (3) carrying out a hydrothermal treatment on the second solid. The present invention provides a diesel oil hydrogenation modification catalyst carrier and applications thereof. According to the present invention, the obtained modified catalyst prepared by using the carrier prepared from the YB molecular sieve has characteristics of high activity, good target product selectivity and the like, and the desulfurization rate and the denitrification rate can achieve 99%; and during the light cycle oil modification process, the difficult problem of the difficult production of the ultra-low sulfur diesel oil (the sulfur content is less than 50 ppm) can be solved, and the catalyst can be used for producing benzene and xylene.
Description
Technical field
The present invention relates to a kind of YB molecular sieve and preparation method thereof and the application in diesel oil hydrogenation modification thereof, and a kind of containing the diesel oil hydrogenation modification support of the catalyst of aforementioned YB molecular sieve and the application in diesel oil hydrogenation modification thereof.
Technical background
Catalytic cracking light cycle oil (LCO), usually used as a kind of second-rate blended diesel component and straight-run diesel oil used in combination, or directly to use as oil fuel.From the composition of LCO, total aromaticity content is up to 80%, and other are alkane, naphthenic hydrocarbon and alkene etc., and wherein, naphthalene system double ring arene accounts for about 70% of total aromaticity content, and mononuclear aromatics and thrcylic aromatic hydrocarbon about respectively account for about 15% of total aromaticity content.The sulphur content of LCO is 0.2-1.5wt%, and nitrogen content is 100-750ppm, and cetane value only has 15-25, and ignition characteristic is poor.Therefore, the novel process that how LCO applies also is arisen at the historic moment.
For meeting market demands, developing the novel process LOC-X that dimethylbenzene and benzene are produced in light cycle oil hydrocracking-alkylation selectivity transfer, is realize fuels from FCC LCO value maximization and meet the new way of producing the continuous increased requirement of dimethylbenzene raw material.Because containing a large amount of impurity such as sulphur, nitrogen in LCO, have poisoning effect to the catalyzer such as follow-up hydrogenation, open loop, so the impurity such as sulphur, nitrogen removed in LCO becomes the key of LCO process exploitation.
LCO belongs to diesel oil distillate, and its deep desulfuration difficulty is large.Major cause: containing, for example 4,6-dimethyldibenzothiophene sulfides in (1) LCO, owing to replacing space steric effect, cause reactive behavior low, deep desulfuration difficulty is large; (2) H in raw material in polycyclic aromatic hydrocarbons and nitrogenous thing and product
2s has restraining effect to deep desulfuration; (3) in desulfurization removing nitric process, do not allow excessive hydrogenation, excessive hydrogenation can cause a large amount of hydrogenation ring-opening reaction, destroys the object of subsequent selective hydrogenation open loop volume increase aromatic hydrocarbons; (4) in hydrodesulfurization process, methyl to be retained to greatest extent, to produce dimethylbenzene to greatest extent.Therefore, these sulphur be removed, just must select the hydrogenation catalyst of multi-functional, high reactivity and highly selective.
US Patent No. 4206036 adopts titanium oxide to make carrier, and after load active component, as Hydrobon catalyst (desulfurization, denitrogenation), but this carrier physical strength is low, and specific surface area is little, and expensive, cannot industrial application.
US Patent No. 2006/0052235AI describes a kind of employing mesopore molecular sieve, if MCM-41 is carrier, cobalt, molybdenum are active ingredient, silicone resin is the Hydrobon catalyst of binding agent, this Hydrobon catalyst has the activity of higher hydrogenating desulfurization/olefin saturated, but mesopore molecular sieve poor stability, is difficult to long-time running under the hydrogenating desulfurization environment of harshness.
CN1178238A discloses a kind of catalyst for hydrocracking diesel oil, the carrier that this catalyzer is made up of aluminum oxide, amorphous silicon aluminium and molecular sieve and load hydrogenation active metals on this carrier form, this catalyzer is applicable to improve cetane number of inferior diesel oil, reduce the hydrogenation process of aromaticity content and desulfurization, denitrogenation, but this catalyzer is in diesel oil hydrogenation modification process, Cracking Selectivity, object product yield still have much room for improvement, and deep desulfuration is difficult.
Summary of the invention
Not enough for prior art, the invention provides a kind of YB molecular sieve, the carrier using this YB molecular sieve to obtain has active high for the preparation of the modifying catalyst obtained, the features such as target product selectivity is good, desulfurization degree, denitrification percent all can reach 99%.
According to a first aspect of the invention, the invention provides a kind of preparation method of YB molecular sieve, the method comprises: (1) soaks after Y zeolite and beta molecular sieve mixing in water-containing solvent, isolates solid and carry out dry roasting and obtain the first solid from immersion material; (2) described first solid is contacted with acidic solution, isolate solid and carry out drying and obtain the second solid from the material after contact; (3) described second solid is carried out hydrothermal treatment consists.
According to a second aspect of the invention, the invention provides the YB molecular sieve prepared according to preparation method of the present invention, SiO in described YB molecular sieve
2with Al
2o
3weight ratio be 70-80, average grain size is 0.3-0.5nm.
According to a third aspect of the invention we, the invention provides a kind of diesel oil hydrogenation modification support of the catalyst, this carrier comprises: amorphous silicon aluminium, YB molecular sieve and aluminum oxide, and described YB molecular sieve prepares according to the method described in the present invention.
According to a forth aspect of the invention, the invention provides YB molecular sieve of the present invention and the application of carrier of the present invention in diesel oil hydrogenation modification.
In the present invention, the carrier using YB molecular sieve to obtain has active high for the preparation of the modifying catalyst obtained, the features such as target product selectivity is good, and desulfurization degree, denitrification percent all can reach 99%.In light cycle oil upgrading processes, can solve and produce the difficult difficult problem of ultra-low-sulphur diesel (sulphur content is lower than 50ppm), and catalyzer also can be used for producing benzene, dimethylbenzene.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
As previously mentioned, the invention provides a kind of preparation method of YB molecular sieve, the method comprises:
(1) soak after Y zeolite and beta molecular sieve mixing in water-containing solvent, from immersion material, isolate solid carry out dry roasting and obtain the first solid;
(2) described first solid is contacted with acidic solution, isolate solid and carry out drying and obtain the second solid from the material after contact;
(3) described second solid is carried out hydrothermal treatment consists.
According to the present invention, in preferred steps (1), the consumption weight ratio of Y zeolite and beta molecular sieve is 0.1-20:1, is preferably 0.4-9:1.
According to the present invention, in preferred steps (1), the condition of immersion comprises: temperature is 60-100 DEG C, is preferably 70-90 DEG C.
According to the present invention, in preferred steps (1), the condition of immersion also comprises: the time is 4-10h, is preferably 5-7h.
According to the present invention, in preferred steps (1), the condition of immersion also comprises: solvent and solute weight ratio is 1-5:1.
According to the present invention, in preferred steps (2), the condition of described contact comprises: temperature is 50-120 DEG C, is preferably 80-90 DEG C.
According to the present invention, in preferred steps (2), the condition of described contact also comprises: the time is 1-6h, is preferably 2-3h.
According to the present invention, in preferred steps (2), the condition of described contact also comprises: liquid-solid amount ratio is 1-20ml liquid/g solid, be preferably 5-15ml liquid/g solid, what use in an embodiment of the present invention is 10ml liquid/g solid, namely relative to every gram of solid, the amount of liquid of use is 10ml.
According to the present invention, in preferred steps (2), the concentration of described acidic solution is 0.05-5mol/L, 0.3-3.2mol/L.
According to the present invention, the range of choices of the kind of described acidic solution is wider, the aqueous solution that can be mineral acid also can for the organic acid aqueous solution, for the present invention, preferred described acidic solution is one or more in acetic acid aqueous solution, the propionic acid aqueous solution, aqueous citric acid solution, aqueous oxalic acid, hydrochloric acid, aqueous nitric acid, aqueous sulfuric acid and phosphate aqueous solution, and what use in an embodiment of the present invention is hydrochloric acid and aqueous nitric acid.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists comprises: the atmosphere of 100% water vapour.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists also comprises: temperature is 450-750 DEG C, is preferably 600-650 DEG C.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists also comprises: system pressure is 0.1-1.2MPa, is preferably 0.3-0.4MPa.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists also comprises: the time is 1-4 hour, is preferably 2-4 hour.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists also comprises: aqua volume ratio 0.5-2.
According to the present invention, in preferred steps (3), the condition of described hydrothermal treatment consists also comprises: mass space velocity is 1-2.5h
-1.
According to the present invention, the method of step (1) and the middle drying of step (2) and condition can be all that the routine of this area is selected, for the present invention, preferred steps (1) and the middle dry temperature of step (2) are 100-120 DEG C separately.
According to the present invention, the method for step (1) roasting and condition can be all that the routine of this area is selected, and for the present invention, in preferred steps (1), the condition of roasting comprises: temperature is 500-600 DEG C.
According to the present invention, the SiO of Y zeolite described in preferred steps (1)
2with Al
2o
3weight ratio be 60-90, degree of crystallinity is 100-120, and average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.55ml/g, and specific surface area is 500-800m
2/ g, Na
2o content is less than 0.05 % by weight.
According to the present invention, the SiO of beta molecular sieve described in preferred steps (1)
2with Al
2o
3weight ratio be 50-80, degree of crystallinity is 100-110, and average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.45ml/g, and specific surface area is 400-700m
2/ g, Na
2o content is less than 0.05 % by weight.
The invention provides a kind of YB molecular sieve prepared according to preparation method of the present invention, SiO in the described YB molecular sieve obtained
2with Al
2o
3weight ratio be 50-90, be preferably 70-80; Average grain size is 0.1-0.7 μm, is preferably 0.3-0.5 μm.
As previously mentioned, the invention provides a kind of diesel oil hydrogenation modification support of the catalyst, this carrier comprises: amorphous silicon aluminium, YB molecular sieve and aluminum oxide, and described YB molecular sieve prepares according to the method described in the present invention.
Support according to the present invention, the pore volume of preferred described carrier is 0.3-0.7ml/g, is preferably 0.45-0.48ml/g; Specific surface area is 280-600m
2/ g, is preferably 380-580m
2/ g.
Support according to the present invention, the pore volume of preferred described amorphous silicon aluminium is 0.6-1.5ml/g, is preferably 0.7-1.3ml/g; Specific surface area is 250-600m
2/ g, is preferably 330-500m
2/ g, is more preferably 340-380m
2/ g.
Support according to the present invention, in preferred described amorphous silicon aluminium, the content of silicon-dioxide is 30-70 % by weight, is preferably 40-60 % by weight, is more preferably 45-55 % by weight.
Support according to the present invention, the pore volume of preferred described aluminum oxide is 3-6ml/g, and specific surface area is 200-400m
2/ g, preferred 230-270m
2/ g.
Support according to the present invention, preferably with the gross weight of carrier for benchmark, the content of YB molecular sieve is 35-75 % by weight, be preferably 45-70 % by weight; The content of amorphous silicon aluminium is 3-15 % by weight, is preferably 5-10 % by weight; The content of aluminum oxide is 10-62 % by weight, is preferably 20-50 % by weight.
The invention provides YB molecular sieve of the present invention and the application of carrier of the present invention in diesel oil hydrogenation modification.
Carrier of the present invention can be prepared according to the method for this area routine, rolls, the process such as shaping, dry, roasting as generally comprised raw material, as long as containing aforementioned component, the present invention to this without particular requirement.
Generally each for carrier component and extrusion aid are put into rolling machine to roll, the time is 10 to 40 minutes, then adds aqueous acid in right amount, continues to roll 10-30 minute.Afterwards, will roll group's body extruded moulding of thing, dry, make dried strip, drying can be carried out at room temperature to 120 DEG C temperature.Dried strip is warming up to 450-650 DEG C of roasting 3-7 hour.
When carrier of the present invention is for the preparation of catalyzer, adopt pickling process, namely with the solution impregnated catalyst carrier containing required active ingredient, then dry, roasting, obtained required catalyzer.
In the present invention, the dipping method of carrier can be saturated dipping, excessive dipping or complexing dipping, and soak time is 1 hour to 18 hours.Carrier after dipping rotates evaporate to dryness in rotatory vacuum instrument, after under 120 DEG C of conditions dry 4-10 hour, dried catalyzer is roasting 2-5 hour at 400-600 DEG C, obtained final catalyzer.
Support preparation method of the present invention is further illustrated below by embodiment, and with the Catalysts and its preparation method that it is carrier, but the present invention is not limited to this.
In the present invention, degree of crystallinity refers to absolute crystallinity, is measured by X-ray diffraction method, and average grain size is recorded by scanning electron microscope, and specific surface area is BET specific surface area, and pore volume adopts BET method to obtain, and constituent content adopts flame photometer to record.
Embodiment 1
The preparation of YB molecular sieve: by the Y zeolite (SiO of industrial synthesis
2with Al
2o
3weight ratio be 60, degree of crystallinity is 100, and average grain size is 0.2 μm, and pore volume is 0.35ml/g, and specific surface area is 500m
2/ g, Na
2o content is less than 0.05 % by weight), beta-molecular sieve (SiO
2with Al
2o
3weight ratio be 80, degree of crystallinity is 110, and average grain size is 0.4 μm, and pore volume is 0.45ml/g, and specific surface area is 700m
2/ g, Na
2o content is less than 0.05 % by weight) by weight, mix according to the ratio of 9:1, in 70 DEG C of water-baths, soak (solvent and solute weight ratio is 2:1) stir 9 hours, the baking oven after suction filtration, filter cake being placed in 120 DEG C is dried to without free-water, then roasting 4h in 550 DEG C of retort furnaces;
By the solid 400g after roasting, add 1.2M (1.2mol/L) HCl aqueous solution 4000ml, stir and be warming up to 80 DEG C, constant temperature stirs 2 hours, filters, washs, drying 6 hours at 110 DEG C.The sample of above-mentioned drying is carried out hydrothermal treatment consists, the atmosphere of 100% water vapour, temperature is 600 DEG C, and control pressure is 0.3MPa, and the treatment time is 2 hours, aqua volume ratio 2, and mass space velocity is 2.5h
-1, obtain YB molecular sieve (SiO
2with Al
2o
3weight ratio be 55; Average grain size is 0.3 μm);
By 50.0 grams of YB molecular sieves, (content of silicon-dioxide is 45 % by weight to 13.2 grams of amorphous silicon aluminiums, and pore volume is 0.82ml/g, and specific surface area is 372m
2/ g), (pore volume is 5.2ml/g to 61.1 grams high sticky aluminum oxide powders, and specific surface area is 268m
2/ g) put into rolling machine, rolling 30 minutes, then adding aqueous acid (be as the criterion according to rolling rear suitable extrusion, it is 12g that citric acid enters amount), after rolling half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours.At dried strip temperature programming to 550 DEG C, roasting 6 hours, obtains carrier.The steeping fluid room temperature immersion 4 hour of carrier containing molybdenum nickel phosphorus, 120 DEG C of dryings 6 hours, temperature programming 450 DEG C of roastings 4 hours, obtain catalyst A, physico-chemical property is in table 1.
Embodiment 2
The preparation of YB molecular sieve: by the Y zeolite (SiO of industrial synthesis
2with Al
2o
3weight ratio be 90, degree of crystallinity is 120, and average grain size is 0.4 μm, and pore volume is 0.55ml/g, and specific surface area is 800m
2/ g, Na
2o content is less than 0.05 % by weight), beta-molecular sieve (SiO
2with Al
2o
3weight ratio be 50, degree of crystallinity is 100, and average grain size is 0.2 μm, and pore volume is 0.35ml/g, and specific surface area is 400m
2/ g, Na
2o content is less than 0.05 % by weight) by weight, mix according to the ratio of 0.4:1, in 80 DEG C of stirred in water bath 6 hours (solvent and solute weight ratio is 4:1), the baking oven after suction filtration, filter cake being placed in 120 DEG C is dried to without free-water, then roasting in 550 DEG C of retort furnaces;
By the solid 400g after roasting, add 0.5MHCl aqueous solution 4000ml, stir and be warming up to 80 DEG C, constant temperature stirs 2 hours, filters, washs, drying 6 hours at 110 DEG C.The sample of above-mentioned drying is carried out hydrothermal treatment consists, the atmosphere of 100% water vapour, aqua volume ratio 0.5, mass space velocity is 1h
-1, temperature is 650 DEG C, control pressure 0.4MPa, and the treatment time is 3 hours, obtains YB molecular sieve (SiO
2with Al
2o
3weight ratio be 80; Average grain size is 0.4 μm);
78.6 grams of YB molecular sieves, 19.7 grams of amorphous silicon aluminiums (with embodiment 1), 33.3 grams high sticky aluminum oxide powders (with embodiment 1) are put into rolling machine, roll 30 minutes, then add aqueous acid (to be as the criterion according to rolling rear suitable extrusion, acetic acid add-on is 15g), after rolling half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours, at dried strip temperature programming to 550 DEG C, roasting 6 hours, obtains carrier.The steeping fluid room temperature immersion 4 hour of carrier containing molybdenum nickel phosphorus, 120 DEG C of dryings 6 hours, temperature programming 450 DEG C of roastings 4 hours, obtain catalyst B, physico-chemical property is in table 1.
Embodiment 3
The preparation of YB molecular sieve: the Y zeolite (SiO getting industrial synthesis
2with Al
2o
3weight ratio be 70, degree of crystallinity is 110, and average grain size is 0.3 μm, and pore volume is 0.45ml/g, and specific surface area is 600m
2/ g, Na
2o content is less than 0.05 % by weight), beta-molecular sieve (SiO
2with Al
2o
3weight ratio be 60, degree of crystallinity is 105, and average grain size is 0.3 μm, and pore volume is 0.4ml/g, and specific surface area is 600m
2/ g, Na
2o content is less than 0.05 % by weight) by weight, mix according to the ratio of 5:1, in 90 DEG C of stirred in water bath 7 hours (solvent and solute weight ratio is 5:1), the baking oven after suction filtration, filter cake being placed in 120 DEG C is dried to without free-water, then roasting in 550 DEG C of retort furnaces;
By the solid 400g after roasting, add 3.2MHCl aqueous solution 4000ml, stir and be warming up to 90 DEG C, constant temperature stirs 3 hours, filters, washs, drying 6 hours at 110 DEG C.The sample of above-mentioned drying is carried out hydrothermal treatment consists, the atmosphere of 100% water vapour, aqua volume ratio 1, mass space velocity is 2h
-1, temperature is 650 DEG C, control pressure 0.4MPa, and the treatment time is 4 hours, obtains YB molecular sieve (SiO
2with Al
2o
3weight ratio be 72; Average grain size is 0.4 μm);
By 100 grams of YB molecular sieves, (content of silicon-dioxide is 55 % by weight to 6.79 grams of amorphous silicon aluminiums, and pore volume is 0.72ml/g, and specific surface area is 347m
2/ g), (pore volume is 4.2ml/g to 27.8 grams high sticky aluminum oxide powders, and specific surface area is 238m
2/ g) put into rolling machine, roll 30 minutes, then (amount is as the criterion according to rolling rear suitable extrusion to add aqueous acid, nitric acid add-on is 12g), after rolling half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours, at dried strip temperature programming to 550 DEG C, roasting 6 hours, obtains carrier; The steeping fluid room temperature immersion 4 hour of carrier containing molybdenum nickel phosphorus, 120 DEG C of dryings 6 hours, temperature programming 450 DEG C of roastings 4 hours, obtain catalyzer C, physico-chemical property is in table 1.
Comparative example 1
The carrier using the method for CN103055909A embodiment 1 to prepare uses as carrier, and all the other are identical with embodiment 1, and obtain catalyzer D1, evaluation result is in table 3.
Comparative example 2
According to the method Kaolinite Preparation of Catalyst of embodiment 1, unlike not using YB molecular sieve to prepare carrier as raw material, and directly use the Y zeolite of embodiment 1 as carrier, all the other conditions are all identical, obtain catalyzer D2, and evaluation result is in table 3.
Comparative example 3
According to the method Kaolinite Preparation of Catalyst of embodiment 1, unlike not using YB molecular sieve to prepare carrier as raw material, and directly use the beta molecular sieve of embodiment 1 as carrier, all the other conditions are all identical, obtain catalyzer D3, and evaluation result is in table 3.
Comparative example 4
According to the method Kaolinite Preparation of Catalyst of embodiment 1, unlike, do not prepare YB molecular sieve, and the Y zeolite of embodiment 1 and beta molecular sieve are directly used in carrier preparation, specific as follows:
By 45 grams of Y zeolites, 5 grams of beta molecular sieves, (content of silicon-dioxide is 45 % by weight to 13.2 grams of amorphous silicon aluminiums, and pore volume is 0.82ml/g, and specific surface area is 372m
2/ g), (pore volume is 5.2ml/g to 61.1 grams high sticky aluminum oxide powders, and specific surface area is 268m
2/ g) put into rolling machine, rolling 30 minutes, then adding aqueous acid (be as the criterion according to rolling rear suitable extrusion, nitric acid add-on is 12g), after rolling half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours.At dried strip temperature programming to 550 DEG C, roasting 6 hours, obtains carrier.The steeping fluid room temperature immersion 4 hour of carrier containing molybdenum nickel phosphorus, 120 DEG C of dryings 6 hours, temperature programming 450 DEG C of roastings 4 hours, obtain catalyzer D4, evaluation result is in table 3.
Test case
Presulfiding of catalyst, vulcanizing agent is for containing 3.0 % by weight CS
2cyclohexane solution, hydrogen to oil volume ratio is 500:1, and implantation temperature is 150 DEG C, per hourly be warming up to 15 DEG C, when being warming up to 230 DEG C, constant temperature 4 hours, continues with 15 DEG C of intensifications per hour, to 290 DEG C of constant temperature 4 hours, then continue with 5 DEG C per hour, to 370 DEG C of constant temperature 5 hours;
Reaction conditions: mass space velocity is 1.5h
-1, pressure is 6MPa, and hydrogen to oil volume ratio is 500:1, temperature 350 DEG C, and reaction raw materials is magnificent imperial straight-run diesel oil, and character is in table 2, and evaluating apparatus, appreciation condition, evaluation result are in table 3.
Table 1
Table 2
Table 3
| Catalyzer | Desulfurization degree, % | Denitrification percent, % | Liquid is received, % |
| A | 99.1 | 97.7 | >96 |
| B | 99.8 | 99.1 | >96 |
| C | 98.9 | 98.1 | >96 |
| D1 | 96.7 | 96.3 | >96 |
| D2 | 96.6 | 95.8 | >96 |
| D3 | 95.8 | 94.9 | >96 |
| D4 | 97.1 | 96.6 | >96 |
In table 3, liquid receives the per-cent of product liquid and the stock oil referred in product.
As shown in Table 3, carrier of the present invention is for the preparation of the catalyst for hydro-upgrading obtained, and desulfurization, denitrification effect are good, and liquid yield is high.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (12)
1. a preparation method for YB molecular sieve, the method comprises:
(1) soak after Y zeolite and beta molecular sieve mixing in water-containing solvent, from immersion material, isolate solid carry out dry roasting and obtain the first solid;
(2) described first solid is contacted with acidic solution, isolate solid and carry out drying and obtain the second solid from the material after contact;
(3) described second solid is carried out hydrothermal treatment consists.
2. preparation method according to claim 1, wherein, in step (1), the consumption weight ratio of Y zeolite and beta molecular sieve is 0.1-20:1, is preferably 0.4-9:1; The condition of soaking comprises: temperature is 60-100 DEG C, and the time is 4-10h, and solvent and solute weight ratio is 1-5:1.
3. preparation method according to claim 1, wherein, in step (2), the condition of described contact comprises: temperature is 50-120 DEG C, and the time is 1-6h, and liquid-solid amount ratio is 1-20ml liquid/g solid; The concentration of described acidic solution is 0.05-5mol/L, and preferred described acidic solution is one or more in acetic acid aqueous solution, the propionic acid aqueous solution, aqueous citric acid solution, aqueous oxalic acid, hydrochloric acid, aqueous nitric acid, aqueous sulfuric acid and phosphate aqueous solution.
4. preparation method according to claim 1, wherein, in step (3), the condition of described hydrothermal treatment consists comprises: the atmosphere of 100% water vapour, and temperature is 450-750 DEG C, and system pressure is 0.1-1.2MPa, time is 1-4 hour, aqua volume ratio 0.5-2, and mass space velocity is 1-2.5h
-1.
5. preparation method according to claim 1, wherein, step (1) and the middle dry temperature of step (2) are 100-120 DEG C separately, and in step (1), the condition of roasting comprises: temperature is 500-600 DEG C.
6. according to the preparation method in claim 1-5 described in any one, wherein,
The SiO of described Y zeolite
2with Al
2o
3weight ratio be 60-90, degree of crystallinity is 100-120, and average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.55ml/g, and specific surface area is 500-800m
2/ g, Na
2o content is less than 0.05 % by weight;
The SiO of described beta molecular sieve
2with Al
2o
3weight ratio be 50-80, degree of crystallinity is 100-110, and average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.45ml/g, and specific surface area is 400-700m
2/ g, Na
2o content is less than 0.05 % by weight.
7. the YB molecular sieve that the preparation method in claim 1-6 described in any one prepares, is characterized in that, SiO in described YB molecular sieve
2with Al
2o
3weight ratio be 50-90, be preferably 70-80; Average grain size is 0.1-0.7 μm, is preferably 0.3-0.5 μm.
8. a diesel oil hydrogenation modification support of the catalyst, this carrier comprises: amorphous silicon aluminium, YB molecular sieve and aluminum oxide, is characterized in that, described YB molecular sieve prepares according to the method in claim 1-6 described in any one.
9. carrier according to claim 8, wherein, the pore volume of described carrier is 0.3-0.7ml/g, and specific surface area is 280-600m
2/ g.
10. carrier according to claim 8, wherein, the pore volume of described amorphous silicon aluminium is 0.6-1.5ml/g, is preferably 0.7-1.3ml/g; Specific surface area is 250-600m
2/ g, is preferably 350-500m
2/ g; In amorphous silicon aluminium, the content of silicon-dioxide is 30-70 % by weight, is preferably 40-60 % by weight; The pore volume of described aluminum oxide is 3-6ml/g, and specific surface area is 200-400m
2/ g.
11. carriers according to Claim 8 in-10 described in any one, wherein, with the gross weight of carrier for benchmark, the content of YB molecular sieve is 35-75 % by weight, and the content of amorphous silicon aluminium is 3-15 % by weight, and the content of aluminum oxide is 10-62 % by weight.
The application of carrier in diesel oil hydrogenation modification in YB molecular sieve described in 12. claim 1-6 any one and claim 8-11 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453058.1A CN105384180B (en) | 2014-09-05 | 2014-09-05 | YB molecular sieves and its preparation method and application and diesel oil hydrogenation modification catalyst carrier and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453058.1A CN105384180B (en) | 2014-09-05 | 2014-09-05 | YB molecular sieves and its preparation method and application and diesel oil hydrogenation modification catalyst carrier and its application |
Publications (2)
| Publication Number | Publication Date |
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| CN105384180A true CN105384180A (en) | 2016-03-09 |
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