CN105384180B - YB molecular sieves and its preparation method and application and diesel oil hydrogenation modification catalyst carrier and its application - Google Patents
YB molecular sieves and its preparation method and application and diesel oil hydrogenation modification catalyst carrier and its application Download PDFInfo
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Abstract
The invention provides a kind of YB molecular sieves and its preparation method and application, this method includes：(1) soaked after mixing Y type molecular sieve and beta molecular sieve in aqueous solvent, roasting after solid is dried is isolated from immersion material and obtains the first solid；(2) first solid is contacted with acid solution, solid is isolated from the material after contact and carries out being dried to obtain the second solid；(3) second solid is subjected to hydro-thermal process.The invention provides a kind of diesel oil hydrogenation modification catalyst carrier and its application.In the present invention, the carrier obtained using YB molecular sieves is used for the active height of modifying catalyst prepared, the features such as target product is selectively good, and desulfurization degree, denitrification percent up to 99%.In light cycle oil upgrading processes, the difficult problem of production ultra-low-sulphur diesel (sulfur content is less than 50ppm) is can solve the problem that, and catalyst can be additionally used in production benzene, dimethylbenzene.
Description
Technical field
Application the present invention relates to a kind of YB molecular sieves and preparation method thereof and its in diesel oil hydrogenation modification, and it is a kind of
Diesel oil hydrogenation modification catalyst carrier containing foregoing YB molecular sieves and its application in diesel oil hydrogenation modification.
Technical background
Catalytic cracking light cycle oil (LCO), is mixed usually as a kind of second-rate blended diesel component and straight-run diesel oil
Conjunction is used, or is directly used as fuel oil.From the point of view of LCO composition, total arene content is up to 80%, and other are alkane, ring
Alkane and alkene etc., wherein, naphthalene system double ring arene accounts for 70% or so of total arene content, and mononuclear aromatics and thrcylic aromatic hydrocarbon are about each
Account for 15% or so of total arene content.LCO sulfur content is 0.2-1.5wt%, and nitrogen content is 100-750ppm, and Cetane number is only
There is 15-25, ignition performance is poor.Therefore, the new technology that how LCO applies also is arisen at the historic moment.
To meet market demands, light cycle oil hydro-conversion-alkylation selectivity transfer production dimethylbenzene and benzene are developed
New technology LOC-X, is to realize fuels from FCC LCO value maximization and meet to produce the new of the continuous increased requirement of xylene feedstock
Approach.Because having poisoning effect to catalyst such as follow-up hydrogenation, open loops containing impurity such as substantial amounts of sulphur, nitrogen in LCO, so de-
Except the impurity such as the sulphur in LCO, nitrogen turn into the key of LCO process exploitations.
LCO belongs to diesel oil distillate, and its deep desulfuration difficulty is big.Main cause：(1) such as 4,6- dimethyl benzenes are contained in LCO
Bithiophene sulfides, due to substitution space steric effect, cause reactivity low, deep desulfuration difficulty is big；(2) it is many in raw material
H in PAH and nitrogenous thing and product2S has inhibitory action to deep desulfuration；(3) do not allow during desulfurization removing nitric
Excessive hydrogenation, excessive hydrogenation can cause largely to be hydrogenated with ring-opening reaction, destroy the mesh that aromatic hydrocarbons is increased production in subsequent selective hydrogenation open loop
's；(4) in hydrodesulfurization, methyl is retained to greatest extent, to produce dimethylbenzene to greatest extent.Therefore, to take off
Except these sulphur, the hydrogenation catalyst of multi-functional, high activity and high selectivity must be just selected.
United States Patent (USP) US4206036 is made after carrier, load active component using titanium oxide, as Hydrobon catalyst
(desulfurization, denitrogenation), but this carrier mechanical strength is low, and specific surface area is small, and expensive, it is impossible to commercial Application.
United States Patent (USP) US2006/0052235AI describes one kind and uses mesopore molecular sieve, and such as MCM-41 is carrier, cobalt, molybdenum
For active component, silicones is the Hydrobon catalyst of binding agent, the Hydrobon catalyst have higher hydrodesulfurization/
The activity of alkene saturation, but mesopore molecular sieve stability is poor, it is difficult to the longtime running under harsh hydrodesulfurization environment.
CN1178238A discloses a kind of catalyst for hydrocracking diesel oil, the catalyst by aluminum oxide, amorphous silicon aluminium and
The hydrogenation active metals composition of the carrier and load of molecular sieve composition on this carrier, the catalyst is applied to improve poor ignition quality fuel
Cetane number, reduction arene content and desulfurization, the hydrogenation process of denitrogenation, but the catalyst is during diesel oil hydrogenation modification,
Cracking Selectivity, purpose product yield still have much room for improvement, and deep desulfuration is difficult.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of YB molecular sieves, the carrier obtained using the YB molecular sieves is used
In the active height of modifying catalyst prepared, the features such as target product is selectively good, desulfurization degree, denitrification percent are reachable
99%.
According to the first aspect of the invention, the invention provides a kind of preparation method of YB molecular sieves, this method includes：
(1) soaked after mixing Y type molecular sieve and beta molecular sieve in aqueous solvent, isolate solid from immersion material and done
Roasting obtains the first solid after dry；(2) first solid is contacted with acid solution, isolated from the material after contact solid
Body simultaneously carries out being dried to obtain the second solid；(3) second solid is subjected to hydro-thermal process.
According to the second aspect of the invention, the invention provides the YB molecules that the preparation method according to the present invention is prepared
SiO in sieve, the YB molecular sieves2With Al2O3Weight ratio be 70-80, average grain size is 0.3-0.5nm.
According to the third aspect of the invention we, the invention provides a kind of diesel oil hydrogenation modification catalyst carrier, the carrier bag
Include：Amorphous silicon aluminium, YB molecular sieves and aluminum oxide, the YB molecular sieves are prepared according to the method described in the present invention.
According to the fourth aspect of the invention, the invention provides YB molecular sieves of the present invention and load of the present invention
Application of the body in diesel oil hydrogenation modification.
In the present invention, the carrier obtained using YB molecular sieves is used for the active height of modifying catalyst prepared, mesh
The features such as product selectivity is good is marked, and desulfurization degree, denitrification percent are up to 99%.In light cycle oil upgrading processes, it can solve the problem that
The difficult problem of ultra-low-sulphur diesel (sulfur content is less than 50ppm) is produced, and catalyst can be additionally used in production benzene, dimethylbenzene.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Embodiment
The embodiment to the present invention is described in detail below.It should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As it was previously stated, the invention provides a kind of preparation method of YB molecular sieves, this method includes：
(1) soak, isolated from immersion material solid in aqueous solvent after mixing Y type molecular sieve and beta molecular sieve
Roasting obtains the first solid after body is dried；
(2) first solid is contacted with acid solution, solid is isolated from the material after contact and is dried
Obtain the second solid；
(3) second solid is subjected to hydro-thermal process.
, according to the invention it is preferred to which in step (1), the consumption weight ratio of Y type molecular sieve and beta molecular sieve is 0.1-20:1,
Preferably 0.4-9:1.
, according to the invention it is preferred to which in step (1), the condition of immersion includes：Temperature is 60-100 DEG C, preferably 70-90 DEG C.
, according to the invention it is preferred to which in step (1), the condition of immersion also includes：Time is 4-10h, preferably 5-7h.
, according to the invention it is preferred to which in step (1), the condition of immersion also includes：Solvent and solute weight ratio is 1-5:1.
, according to the invention it is preferred to which in step (2), the condition of the contact includes：Temperature is 50-120 DEG C, preferably 80-
90℃。
, according to the invention it is preferred to which in step (2), the condition of the contact also includes：Time is 1-6h, preferably 2-3h.
, according to the invention it is preferred to which in step (2), the condition of the contact also includes：The solid amount ratio of liquid be 1-20ml liquid/
G solids, preferably 5-15ml liquid/g solids, use in an embodiment of the present invention for 10ml liquid/g solids, i.e., it is relative
In every gram of solid, the amount of liquid used is 10ml.
, according to the invention it is preferred to which in step (2), the concentration of the acid solution is 0.05-5mol/L, 0.3-3.2mol/
L。
According to the present invention, optional wider range of the species of the acid solution can also may be used for the aqueous solution of inorganic acid
Think the aqueous solution of organic acid, for the present invention, preferably described acid solution is acetic acid aqueous solution, the propionic acid aqueous solution, citric acid
One or more in the aqueous solution, aqueous oxalic acid, hydrochloric acid, aqueous solution of nitric acid, aqueous sulfuric acid and phosphate aqueous solution, at this
Used in the embodiment of invention for hydrochloric acid and aqueous solution of nitric acid.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process includes：The atmosphere of 100% vapor.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process also includes：Temperature is 450-750 DEG C, excellent
Elect 600-650 DEG C as.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process also includes：System pressure is 0.1-
1.2MPa, preferably 0.3-0.4MPa.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process also includes：Time is 1-4 hours, preferably
For 2-4 hours.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process also includes：Aqua volume ratio 0.5-2.
, according to the invention it is preferred to which in step (3), the condition of the hydro-thermal process also includes：Mass space velocity is 1-2.5h-1。
The method and condition dried according to the present invention, in step (1) and step (2) can be selected for the conventional of this area
Select, for the present invention, the temperature dried in preferred steps (1) and step (2) is respectively 100-120 DEG C.
According to the present invention, the method and condition of step (1) roasting can be the conventional selection of this area, for this hair
Bright, the condition of roasting includes in preferred steps (1)：Temperature is 500-600 DEG C.
, according to the invention it is preferred to the SiO of Y type molecular sieve described in step (1)2With Al2O3Weight ratio be 60-90, crystallization
Spend for 100-120, average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.55ml/g, and specific surface area is 500-800m2/
G, Na2O content is less than 0.05 weight %.
, according to the invention it is preferred to the SiO of beta molecular sieve described in step (1)2With Al2O3Weight ratio be 50-80, crystallization
Spend for 100-110, average grain size is 0.2-0.4 μm, and pore volume is 0.35-0.45ml/g, and specific surface area is 400-700m2/
G, Na2O content is less than 0.05 weight %.
The invention provides the YB molecular sieves that a kind of preparation method according to the present invention is prepared, the obtained YB points
SiO in son sieve2With Al2O3Weight ratio be 50-90, preferably 70-80；Average grain size is 0.1-0.7 μm, is preferably
0.3-0.5μm。
As it was previously stated, the invention provides a kind of diesel oil hydrogenation modification catalyst carrier, the carrier includes：Unformed silicon
Aluminium, YB molecular sieves and aluminum oxide, the YB molecular sieves are prepared according to the method described in the present invention.
Support according to the present invention, the pore volume of preferably described carrier is 0.3-0.7ml/g, preferably 0.45-0.48ml/g；
Specific surface area is 280-600m2/ g, preferably 380-580m2/g。
Support according to the present invention, the pore volume of preferably described amorphous silicon aluminium is 0.6-1.5ml/g, preferably 0.7-
1.3ml/g；Specific surface area is 250-600m2/ g, preferably 330-500m2/ g, more preferably 340-380m2/g。
The content of silica is 30-70 weight % in support according to the present invention, preferably described amorphous silicon aluminium, preferably
For 40-60 weight %, more preferably 45-55 weight %.
Support according to the present invention, the pore volume of preferably described aluminum oxide is 3-6ml/g, and specific surface area is 200-400m2/ g,
It is preferred that 230-270m2/g。
Support according to the present invention, preferably on the basis of the gross weight of carrier, the content of YB molecular sieves is 35-75 weight %,
Preferably 45-70 weight %；The content of amorphous silicon aluminium is 3-15 weight %, preferably 5-10 weight %；The content of aluminum oxide
For 10-62 weight %, preferably 20-50 weight %.
The invention provides YB molecular sieves of the present invention and carrier of the present invention in diesel oil hydrogenation modification
Using.
The carrier of the present invention can be prepared according to the conventional method in this area, such as generally comprised raw material and rolled, be molded, do
The processes such as dry, roasting, as long as containing aforementioned component, the present invention is to this without particular/special requirement.
General carrier each component and extrusion aid are put into roller is rolled, and the time is 10 to 40 minutes, then appropriate to add
Enter the aqueous solution of acid, continue to roll 10-30 minutes.Afterwards, group's body extruded moulding of thing will be rolled, dries, dried strip is made,
Drying can be in room temperature to progress at a temperature of 120 DEG C.Dried strip is warming up to 450-650 DEG C and is calcined 3-7 hours.
When the carrier of the present invention is used to prepare catalyst, using infusion process, i.e., soaked with the solution containing required active component
Stain catalyst carrier, then dries, is calcined, catalyst needed for being made.
In the present invention, the dipping method of carrier can be saturation dipping, excessive dipping or complexing dipping, soak time
For 1 hour to 18 hours.Carrier after dipping rotates in rotatory vacuum instrument to be evaporated, after under the conditions of 120 DEG C dry 4-10 it is small
When, dried catalyst is calcined 2-5 hours at 400-600 DEG C, and final catalyst is made.
The support preparation method of the present invention is further illustrated below by embodiment, and using it as the catalyst of carrier
And preparation method thereof, but the present invention is not limited thereto.
In the present invention, crystallinity refers to absolute crystallinity, is determined by X-ray diffraction method, and average grain size passes through
ESEM is measured, and specific surface area is BET specific surface area, and pore volume is obtained using BET method, and constituent content is measured using flame luminosity
.
Embodiment 1
The preparation of YB molecular sieves：By the Y type molecular sieve (SiO industrially synthesized2With Al2O3Weight ratio be 60, crystallinity
For 100, average grain size is 0.2 μm, and pore volume is 0.35ml/g, and specific surface area is 500m2/ g, Na2O content is less than 0.05 weight
Measure %), beta-molecular sieve (SiO2With Al2O3Weight ratio be 80, crystallinity is 110, and average grain size is 0.4 μm, and pore volume is
0.45ml/g, specific surface area is 700m2/ g, Na2O content is less than 0.05 weight %) by weight, according to 9:1 ratio mixing,
(solvent and solute weight ratio is 2 for immersion in 70 DEG C of water-baths:1) stir 9 hours, filter cake is placed in 120 DEG C of baking oven after suction filtration and dried
To without free water, then 4h is calcined in 550 DEG C of Muffle furnaces；
By the solid 400g after roasting, 1.2M (1.2mol/L) HCl/water solution 4000ml is added, stirring is warming up to 80 DEG C,
Constant temperature is stirred 2 hours, filtering, washing, is dried 6 hours at 110 DEG C.The sample of above-mentioned drying is subjected to hydro-thermal process, 100%
The atmosphere of vapor, temperature is 600 DEG C, and control pressure is 0.3MPa, and processing time is 2 hours, and aqua volume ratio 2, quality is empty
Speed is 2.5h-1, obtain YB molecular sieves (SiO2With Al2O3Weight ratio be 55；Average grain size is 0.3 μm)；
By 50.0 grams of YB molecular sieves, (content of silica is 45 weight % to 13.2 grams of amorphous silicon aluminiums, and pore volume is
0.82ml/g, specific surface area is 372m2/ g), (pore volume is 5.2ml/g to 61.1 grams high viscous alumina powder, and specific surface area is 268m2/
G) it is put into roller, rolls 30 minutes, the aqueous solution for then adding acid (is defined, citric acid enters according to rear suitable extrusion is rolled
Measure as 12g), roll after half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours.Dried strip temperature programming is to 550 DEG C
Lower roasting 6 hours, obtains carrier.The maceration extract room temperature immersion 4 hours of the carrier phosphorus of nickel containing molybdenum, 120 DEG C of dryings 6 hours, program liter
450 DEG C of temperature is calcined 4 hours, obtains catalyst A, physico-chemical property is shown in Table 1.
Embodiment 2
The preparation of YB molecular sieves：By the Y type molecular sieve (SiO industrially synthesized2With Al2O3Weight ratio be 90, crystallinity
For 120, average grain size is 0.4 μm, and pore volume is 0.55ml/g, and specific surface area is 800m2/ g, Na2O content is less than 0.05 weight
Measure %), beta-molecular sieve (SiO2With Al2O3Weight ratio be 50, crystallinity is 100, and average grain size is 0.2 μm, and pore volume is
0.35ml/g, specific surface area is 400m2/ g, Na2O content is less than 0.05 weight %) by weight, according to 0.4:1 ratio is mixed
Close, in 80 DEG C of stirred in water bath, (solvent and solute weight ratio is 4 within 6 hours:1), filter cake is placed in 120 DEG C of baking oven after suction filtration and dried extremely
Without free water, then it is calcined in 550 DEG C of Muffle furnaces；
By the solid 400g after roasting, 0.5M HCl/water solution 4000ml are added, stirring is warming up to 80 DEG C, constant temperature stirring 2
Hour, filtering, washing are dried 6 hours at 110 DEG C.The sample of above-mentioned drying is subjected to hydro-thermal process, 100% vapor
Atmosphere, aqua volume ratio 0.5, mass space velocity is 1h-1, temperature is 650 DEG C, and control pressure 0.4MPa, processing time is 3 hours,
Obtain YB molecular sieves (SiO2With Al2O3Weight ratio be 80；Average grain size is 0.4 μm)；
By 78.6 grams of YB molecular sieves, 19.7 grams of amorphous silicon aluminiums (be the same as Example 1), 33.3 grams high viscous alumina powders (with real
Apply example 1) it is put into roller, roll 30 minutes, then adding the sour aqueous solution, (according to rolling afterwards, suitably extrusion is defined, acetic acid
Addition is 15g), roll after half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours, dried strip temperature programming is extremely
It is calcined 6 hours at 550 DEG C, obtains carrier.The maceration extract room temperature immersion 4 hours of the carrier phosphorus of nickel containing molybdenum, 120 DEG C of dryings 6 hours,
450 DEG C of temperature programming is calcined 4 hours, obtains catalyst B, physico-chemical property is shown in Table 1.
Embodiment 3
The preparation of YB molecular sieves：Take the Y type molecular sieve (SiO industrially synthesized2With Al2O3Weight ratio be 70, crystallinity
For 110, average grain size is 0.3 μm, and pore volume is 0.45ml/g, and specific surface area is 600m2/ g, Na2O content is less than 0.05 weight
Measure %), beta-molecular sieve (SiO2With Al2O3Weight ratio be 60, crystallinity is 105, and average grain size is 0.3 μm, and pore volume is
0.4ml/g, specific surface area is 600m2/ g, Na2O content is less than 0.05 weight %) by weight, according to 5:1 ratio mixing,
(solvent and solute weight ratio is 5 to 90 DEG C of stirred in water bath within 7 hours:1), filter cake is placed in 120 DEG C of baking oven after suction filtration and dried to without trip
From water, then it is calcined in 550 DEG C of Muffle furnaces；
By the solid 400g after roasting, 3.2M HCl/water solution 4000ml are added, stirring is warming up to 90 DEG C, constant temperature stirring 3
Hour, filtering, washing are dried 6 hours at 110 DEG C.The sample of above-mentioned drying is subjected to hydro-thermal process, 100% vapor
Atmosphere, aqua volume ratio 1, mass space velocity is 2h-1, temperature is 650 DEG C, and control pressure 0.4MPa, processing time is 4 hours, is obtained
To YB molecular sieves (SiO2With Al2O3Weight ratio be 72；Average grain size is 0.4 μm)；
By 100 grams of YB molecular sieves, (content of silica is 55 weight % to 6.79 grams of amorphous silicon aluminiums, and pore volume is
0.72ml/g, specific surface area is 347m2/ g), (pore volume is 4.2ml/g to 27.8 grams high viscous alumina powder, and specific surface area is 238m2/
G) it is put into roller, rolls 30 minutes, the aqueous solution for then adding acid (measures suitable extrusion after basis is rolled to be defined, nitric acid adds
Enter amount for 12g), roll after half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours, dried strip temperature programming to 550
It is calcined 6 hours at DEG C, obtains carrier；The carrier maceration extract room temperature immersion 4 hours of the phosphorus of nickel containing molybdenum, 120 DEG C of dryings 6 hours, program
450 DEG C of heating is calcined 4 hours, obtains catalyst C, physico-chemical property is shown in Table 1.
Comparative example 1
The carrier prepared using the method for CN103055909A embodiments 1 is used as carrier, remaining and embodiment 1
It is identical, catalyst D1 is obtained, evaluation result is shown in Table 3.
Comparative example 2
Method according to embodiment 1 prepares catalyst, the difference is that carrier is prepared as raw material without using YB molecular sieves, and
Directly use the Y type molecular sieve of embodiment 1 as carrier, remaining condition all same obtains catalyst D2, evaluation result is shown in Table 3.
Comparative example 3
Method according to embodiment 1 prepares catalyst, the difference is that carrier is prepared as raw material without using YB molecular sieves, and
Directly use the beta molecular sieve of embodiment 1 as carrier, remaining condition all same obtains catalyst D3, evaluation result is shown in Table 3.
Comparative example 4
Method according to embodiment 1 prepares catalyst, unlike, do not prepare YB molecular sieves, and by the Y types of embodiment 1
Molecular sieve and beta molecular sieve are directly used in carrier preparation, specific as follows：
By 45 grams of Y type molecular sieves, 5 grams of beta molecular sieves, (content of silica is 45 weights to 13.2 grams of amorphous silicon aluminiums
% is measured, pore volume is 0.82ml/g, and specific surface area is 372m2/ g), (pore volume is 5.2ml/g to 61.1 grams high viscous alumina powder, compares table
Area is 268m2/ g) it is put into roller, roll 30 minutes, the aqueous solution for then adding acid (is according to rear suitable extrusion is rolled
Standard, nitric acid addition is 12g), roll after half an hour, extrusion, wet bar health 6 hours, 120 DEG C of dryings 6 hours.Dried strip program
It is warming up at 550 DEG C and is calcined 6 hours, obtains carrier.The carrier maceration extract room temperature immersion 4 hours of the phosphorus of nickel containing molybdenum, 120 DEG C of dryings 6
Hour, 450 DEG C of temperature programming is calcined 4 hours, obtains catalyst D4, evaluation result is shown in Table 3.
Test case
Presulfiding of catalyst, vulcanizing agent is containing 3.0 weight %CS2Cyclohexane solution, hydrogen to oil volume ratio is 500:1, note
Enter temperature for 150 DEG C, 15 DEG C are warming up to per hour, constant temperature 4 hours when being warming up to 230 DEG C continue, with 15 DEG C per hour heatings, to arrive
290 DEG C of constant temperature 4 hours, was further continued for 5 DEG C per hour, to 370 DEG C of constant temperature 5 hours；
Reaction condition：Mass space velocity is 1.5h-1, pressure is 6MPa, and hydrogen to oil volume ratio is 500:1,350 DEG C of temperature, reaction
Raw material is the imperial straight-run diesel oil of China, and property is shown in Table 2, and evaluating apparatus, appreciation condition, evaluation result are shown in Table 3.
Table 1
Table 2
Table 3
| Catalyst | 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 percentage of the product liquid and feedstock oil that refer in product.
As shown in Table 3, carrier of the invention is used for the catalyst for hydro-upgrading prepared, desulfurization, denitrogenation effect
It is really good, and liquid yield is high.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
Claims (16)
1. a kind of preparation method of YB molecular sieves, this method includes：
(1) soaked after mixing Y type molecular sieve and beta molecular sieve in aqueous solvent, isolate solid from immersion material and enter
Row dry roasting obtains the first solid；
(2) first solid is contacted with acid solution, solid is isolated from the material after contact and is dried to obtain
Second solid；
(3) second solid is subjected to hydro-thermal process.
2. preparation method according to claim 1, wherein, in step (1), the consumption weight of Y type molecular sieve and beta molecular sieve
Amount is than being 0.1-20:1；The condition of immersion includes：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 2, wherein, the consumption weight ratio of Y type molecular sieve and beta molecular sieve is 0.4-
9:1。
4. preparation method according to claim 1, wherein, in step (2), the condition of the contact includes：Temperature is 50-
120 DEG C, the time is 1-6h, and the solid amount ratio of liquid is 1-20ml liquid/g solids；The concentration of the acid solution is 0.05-5mol/
L。
5. preparation method according to claim 4, wherein, the acid solution is acetic acid aqueous solution, the propionic acid aqueous solution, lemon
One or more in lemon aqueous acid, aqueous oxalic acid, hydrochloric acid, aqueous solution of nitric acid, aqueous sulfuric acid and phosphate aqueous solution.
6. preparation method according to claim 1, wherein, in step (3), the condition of the hydro-thermal process includes：100%
The atmosphere of vapor, temperature is 450-750 DEG C, and system pressure is 0.1-1.2MPa, and the time is 1-4 hours, aqua volume ratio
0.5-2, mass space velocity is 1-2.5h-1。
7. preparation method according to claim 1, wherein, the temperature dried in step (1) and step (2) is respectively 100-
120 DEG C, the condition of the middle roasting of step (1) includes：Temperature is 500-600 DEG C.
8. the preparation method according to any one in claim 1-7, wherein,
The SiO of the Y type molecular sieve2With Al2O3Weight ratio be 60-90, crystallinity is 100-120, and average grain size is
0.2-0.4 μm, pore volume is 0.35-0.55ml/g, and specific surface area is 500-800m2/ g, Na2O content is less than 0.05 weight %；
The SiO of the beta molecular sieve2With Al2O3Weight ratio be 50-80, crystallinity is 100-110, and average grain size is
0.2-0.4 μm, pore volume is 0.35-0.45ml/g, and specific surface area is 400-700m2/ g, Na2O content is less than 0.05 weight %.
9. the YB molecular sieves that the preparation method in claim 1-8 described in any one is prepared, it is characterised in that the YB
SiO in molecular sieve2With Al2O3Weight ratio be 50-90；Average grain size is 0.1-0.7 μm.
10. YB molecular sieves according to claim 9, wherein, SiO in the YB molecular sieves2With Al2O3Weight ratio be 70-
80；Average grain size is 0.3-0.5 μm.
11. a kind of diesel oil hydrogenation modification catalyst carrier, the carrier includes：Amorphous silicon aluminium, YB molecular sieves and aluminum oxide, it is special
Levy and be, the YB molecular sieves are prepared according to the method described in any one in claim 1-8.
12. carrier according to claim 11, wherein, the pore volume of the carrier is 0.3-0.7ml/g, and specific surface area is
280-600m2/g。
13. carrier according to claim 12, wherein, the pore volume of the amorphous silicon aluminium is 0.6-1.5ml/g；Compare surface
Product is 250-600m2/g；The content of silica is 30-70 weight % in amorphous silicon aluminium；The pore volume of the aluminum oxide is 3-
6ml/g, specific surface area is 200-400m2/g。
14. carrier according to claim 13, wherein, the pore volume of the amorphous silicon aluminium is 0.7-1.3ml/g；Compare surface
Product is 350-500m2/g；The content of silica is 40-60 weight % in amorphous silicon aluminium.
15. the carrier according to any one in claim 11-14, wherein, on the basis of the gross weight of carrier, YB molecular sieves
Content be 35-75 weight %, the content of amorphous silicon aluminium is 3-15 weight %, and the content of aluminum oxide is 10-62 weight %.
16. the carrier in the YB molecular sieves and claim 11-15 described in claim 1-8 any one described in any one exists
Application in diesel oil hydrogenation modification.
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