Patent ID: 7638037
Filing Date: 2009-12-29
Classification: B01J,C10G,C10M,C10N

Abstract:
1. A process to prepare a lubricant having a dynamic viscosity at −35° C. of below 5000 cP by performing the following steps: (a) hydrocracking a feed containing more than 50 wt % wax by contacting said feed in the presence of hydrogen with a catalyst comprising a Group VIII metal component supported on a refractory oxide carrier under hydrocracking conditions sufficient to achieve between 40 and 70 wt % wax conversion; and (b) catalytically dewaxing at least part of the effluent of step (a) with a catalyst composition comprising a noble Group VIII metal, a binder and zeolite crystallites of the MTW type to obtain a base oil product in high yield having a pour point below −10° C. and having a viscosity index greater than 120; and (c) adding a pour point depressant additive to the base oil product obtained in step (b) thereby obtaining a lubricant having a dynamic viscosity at 35° C. of below 5000 cP.