Olefin oligomer functional fluid using internal olefins
AssigneeEthyl Corporation
InventorsRonald L. Shubkin, Gerhard O. Kuehnhanss
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Abstract
Olefin oligomers having a lower pour point are obtained by forming a mixture of C.sub.8-18 olefins containing 50-90 weight percent .alpha.-olefins and 10-50 weight percent internal olefins and oligomerizing this mixture using a Friedel Crafts catalyst (e.g. BF.sub.3) and a promoter (e.g. n-butanol). The mixture of olefins can be formed from .alpha.-olefins (e.g. 1-decene) by subjecting the .alpha.-olefins to isomerization until 10-50 weight percent of the olefins are internal olefins.
Claims12
A process for making a C.sub.8-18 olefin oligomer having a low pour point, said process comprising:
- (A) isomerizing a C.sub.8-18 .alpha.-olefin or mixture thereof in the presence of a Friedel Crafts catalyst until about 10-50 weight percent of said .alpha.-olefin is converted to internal olefin forming an isomerized mixture,
- (B) adding a Friedel Crafts catalyst promoter to said isomerized mixture,
- (C) oligomerizing said isomerized mixture at a temperature of about 10.degree.-80.degree. C.,
- (D) contacting the oligomerized reaction mixture with an aqueous wash to remove said Friedel Crafts catalyst,
- (E) distilling the washed reaction mixture to remove monomer and dimer leaving a topped unsaturated oligomer as a residual product and
- (F) hydrogenating said residual in the presence of a hydrogenation catalyst to obtain a substantially saturated olefin oligomer.
A process for making a C.sub.8-18 olefin oligomer having a low pour point, said process comprising:
- (A) isomerizing a C.sub.8-18 .alpha.-olefin or mixture thereof in the presence of a Friedel Crafts catalyst until about 10-50 weight percent of said .alpha.-olefin is converted to internal olefin forming an isomerized mixture,
- (B) adding a Friedel Crafts catalyst promoter to said isomerized mixture,
- (C) oligomerizing said isomerized mixture at a temperature of about 10.degree.-80.degree. C. and
- (D) contacting the oligomerized reaction mixture with an aqueous wash to remove said Friedel Crafts catalyst.
Dependencies are inferred from the claim text.