Patent ID: 7531083
Filing Date: 2009-05-12
Classification: C10M,C10N,H01B

Abstract:
1. A method for making a cycloalkane base oil comprising: refining crude under refining conditions effective to produce aromatic vacuum gas oil boiling at a temperature in the range of from 371° C. to 538° C., the aromatic vacuum gas oil comprising carbonaceous materials, a majority of the carbonaceous materials being selected from the group consisting of cycloalkanes and aromatics; contacting the aromatic vacuum gas oil with hydrocracking catalyst under hydrocracking conditions effective to produce hydrocracking product; subjecting hydrocracking product to stripping conditions effective to increase the content of cyclic hydrocarbons selected from the group consisting of cycloalkanes, cycloalkenes, and combinations thereof and removing hydrogen sulfide and ammonia and producing stripped hydrocracking product; contacting stripped hydrocracking product with isomerization/dewaxing/hydrogenation (IDH) catalyst comprising a metal selected from the group consisting of platinum, palladium, and combinations thereof, under IDH conditions effective to saturate aromatics to cycloalkanes, reduce normal paraffins, and to produce IDH product comprising greater than 50 wt. % of one or more cyclic hydrocarbons selected from the group consisting of cycloalkanes and cycloalkenes; without solvent extracting, contacting IDH product with hydrotreating catalyst under hydrotreating conditions effective to produce hydrotreated product comprising greater than 50 wt. % cycloalkanes; and, separating from said hydrotreated product cycloalkane base oil comprising a quantity of less than 50 wt. % isoparaffins and 50 wt. % or more cycloalkanes, said cycloalkane base oil boiling at a temperature in the range of from about 260° C. to about 371° C.