Lubricant oligomers of C.sub.2 -C.sub.5 olefins

Details Lubricant oligomers of C.sub.2 -C.sub.5 olefins Lubricant oligomers of C.sub.2 -C.sub.5 olefins

1991-01-29

1991-11-26

Garvin, Patrick P.

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

Component of indefinite molecular weight greater than 150

585 10, 585 11, 585 17, 585 19, 585411, 585452, C10L 116

Patent

active

050684760

ABSTRACT:
Liquid olefin oligomers are produced by the oligomerization of C.sub.2 -C.sub.5 alpha olefin alone or with ethylene as a co-monomer. The oligomers having high viscosity index and a structure which is characterized by a regio-irregularity of at least 20 percent, usually from 20 to 40 percent. The olefins are oligomerized with a reduced valence state chromium oxide catalyst on a silica support, usually at a temperature from 90.degree. to 250.degree. C., although lower temperatures can also be used with ethylene as a con-monomer. The liquid oligomerization products can be produced in wide range of viscosities including the direct production of low viscosity lubricants having high viscosity index.

REFERENCES:
patent: 3232913 (1966-02-01), Van Weynbergh
patent: 4504592 (1985-03-01), Van der Leemput
patent: 4681866 (1987-07-01), McDaniel
patent: 4827064 (1989-05-01), Wu
patent: 4827073 (1989-05-01), Wu
"Surface Compounds of Transistion Metals," Weiss, Journal of Catalysis 88, 424-430.

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