An improved method of beneficiating ilmenite using two chlorinators in order to oxidize by-product iron chlorides to chlorine in the vapor phase and eliminate the necessity of separating the chlorine from combustion gas by cryogenic methods comprising using a first stage which produces beneficiated ore,...http://www.google.co.uk/patents/US4389391?utm_source=gb-gplus-sharePatent US4389391 - Process for beneficiating titaniferous ores
