公开(公告)号：US3654133A

公开(公告)日：1972-04-04

申请号：US3654133D

申请日：1970-06-23

申请人： UNIVERSAL OIL PROD CO

发明人： OLSON ROBERT K

IPC分类号： C10G65/10 ,  C10G65/12 ,  C10G23/02 ,  C10G37/02

CPC分类号： C10G65/10 ,  C10G2400/10

摘要： A MULTIPLE-STAGE PROCESS FOR PRODUCING DEWAXED LUBRICATING OIL BASE STOCKS HAVING VISCOSITY INDICES GREATER THAN ABOUT 100. THE HYDROCARBONACEOUS CHARGE STOCK IS INITIALLY PROCESSED IN A HYDROCRACKING ZON E SELECTIVELY CONDENSED-RING HYDROCARBONS TO A RELATIVELY HIGH VISCOSITY INDEX PRODUCT. THE PRODUCT EFFLUENT FROM THIS FIRST ZONE IS SEPARATED, AT SUBSTANTIALLY THE SAME TEMPERATURE AND PRESSURE, PRODUCING A PRINCIPALLY LIQUID PHASE CONTAINING THE HEAVIER WAXY COMPONENTS. THIS WAXY DISTILLATE SERVES AS A CHARGE STOCK TO THE SECOND REACTION ZONE WHICH IS SELECTIVELY CONTROLLED TO CONVERT THE WAXY CONSTITUENTS, BY WAY OF BOTH HYDROCRACKING AND HYDROISOMERIZATION, INTO LOWER-BOILING HYDROCARBON PRODUCTS.