Patent ID: 6420618
Filing Date: 2002-07-16
Classification: C10G

Abstract:
A process for producing isoparaffinic lubricant base stocks comprising at least 95 wt. % non-cyclic isoparaffins comprises (i) reacting H2 and CO in the presence of a Fischer-Tropsch hydrocarbon synthesis catalyst at reaction conditions effective to form a waxy, paraffinic hydrocarbon feed having an initial boiling point in the range of 650-750Â° F., an end point of at least 105Â° F. and a T90âˆ’T10 temperature spread of at least 350Â° F., (ii) hydroisomerizing said waxy feed to form a hydroisomerate having an initial boiling point in said 650-750Â° F. range, (iii) dewaxing said 650-750Â° F.+ hydroisomerate to reduce its pour point and form a 650-750Â° F.+ dewaxate, and (iv) fractionating said 650-750Â° F.+ dewaxate to form two or more fractions of different viscosity as said base stocks.