Processes for Preparing Low Viscosity Lubricants
AssigneeChevron Phillips Chemical Company LP
InventorsHu Yang, Kenneth D. Hope, Jeff C. Gee
Life of this patent
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Abstract
Disclosed are processes for forming an oligomer product by contacting a feedstock olefin containing trisubstituted olefins with a solid acid catalyst. The oligomer product can be formed at an oligomerization temperature in a range from −20° C. to 40° C. Polyalphaolefins produced from the oligomer product can have reduced viscosities at low temperatures.
Claims20
A process comprising contacting a feedstock olefin with a solid acid catalyst to form an oligomer product at an oligomerization temperature in a range from −20° C. to 40° C., wherein the feedstock olefin comprises trisubstituted olefins.
A process for forming a polyalphaolefin, the process comprising:
- (1) contacting a monomer comprising a C6 to C24 normal alpha olefin with a catalyst system to form a dimer composition comprising trisubstituted dimers, the catalyst system comprising a metallocene compound, a chemically-treated solid oxide, and a co-catalyst;
- (2) removing at least a portion of the monomer and/or at least a portion of higher oligomers from the dimer composition to form a trisubstituted olefin composition comprising trisubstituted dimers;
- (3) contacting the trisubstituted olefin composition with a solid acid catalyst to form an oligomer product comprising olefin tetramers at an oligomerization temperature in a range from −20° C. to 40° C.;
- (4) removing at least a portion of the oligomer product from the trisubstituted dimers and the solid acid catalyst to form a tetramer composition comprising olefin tetramers;
- and
- (5) hydrogenating the tetramer composition to form the polyalphaolefin.
A polyalphaolefin comprising at least 80 wt. % C4-0 saturated branched hydrocarbons, wherein the polyalphaolefin has a kinematic viscosity at −40° C. in a range from 4,500 to 9,500 cSt.
Dependencies are inferred from the claim text.