Loading patent…
AssigneeExxon Research & Engineering Co.
InventorsRobert J. Wittenbrink, Daniel F. Ryan, Douglas R. Boate
Estimating the term…
A lubricating base stock useful for forming lubricants such as a multigrade automotive oils, automatic transmission oils, greases and the like is prepared by hydroisomerizing a waxy hydrocarbon feed fraction having an initial boiling point in the 650-750.degree. F. range and an end point of at least 1050.degree. F., synthesized by a slurry Fischer-Tropsch hydrocarbon synthesis process. The hydroisomerization forms a hydroisomerate containing the desired base stock which is recovered, without dewaxing the hydroisomerate. The hydroisomerization is conducted at conditions effective to convert at least 67 wt. % of the 650-750.degree. F.+ waxy feed hydrocarbons to lower boiling hydrocarbons. When combined with a standard lubricant additive package, these base stocks have been formed into multigrade automotive crankcase oils, transmission oils and hydraulic oils meeting the specifications for these oils.
A process for producing an isoparaffinic lubricant base stock which comprises hydroisomerizing a waxy, paraffinic, Fischer-Tropsch synthesized hydrocarbon feed comprising 650-750.degree. F.+ hydrocarbons, by reacting said feed with hydrogen in the presence of a hydroisomerization catalyst comprising a Group VIII non-noble catalytic component and an acidic carrier component comprising amorphous silica-alumina, said hydroisomerization conducted at a conversion level of said 650-750.degree. F.+ feed hydrocarbons sufficient to produce a 650-750.degree. F.+ hydroisomerate base stock which comprises said base stock which does not require dewaxing.
A process for producing an isoparaffinic lubricant base stock which comprises hydroisomerizing a waxy, paraffinic, Fischer-Tropsch synthesized hydrocarbon feed comprising 650-750.degree. F.+ hydrocarbons, by reacting said feed with hydrogen in the presence of a hydroisomerization catalyst having both a hydrogenation/dehydrogenation function and an acid hydrocracking function and comprising a Group VIII non-noble metal catalytic component, a Group VIB metal catalytic component, and an acidic carrier component comprising amorphous silica-alumina containing less than 50 wt. % silica, said hydroisomerization conducted at a conversion level of said 650-750.degree. F.+ feed hydrocarbons sufficient to produce a hydroisomerate which comprises said base stock, wherein said base stock does not require dewaxing.
Dependencies are inferred from the claim text.