C2-c5 olefin oligomerization by reduced chromium catalysis

Details C2-c5 olefin oligomerization by reduced chromium catalysis C2-c5 olefin oligomerization by reduced chromium catalysis

C - Chemistry, Metallurgy

07

C

260/706.1

C07C 2/10 (2006.01) C10G 71/04 (1990.01)

Patent

CA 2034687

F-5313 C2-C5 OLEFIN OLIGOMERIZATION BY REDUCED CHROMIUM CATALYSIS ABSTRACT A process is disclosed for the oligomerization of C2-C5 alpha olefin mixtures or C3-C5 alpha-olefins alone to produce liquid olefin oligomers having high viscosity index and regio-regularity not greater than 40%, usually from 20 to 40%. Lower hydrocarbon fractions useful as gasoline and distillate fuels are also produced. The process comprises contacting the mixtures or C3-C5 alpha-olefins with a reduced valence state chromium oxide catalyst on a silica support in an oligomerization zone under oligomerization conditions comprising a temperature from 90C to 250C. The process can be carried out in dilute form using an inert solvent such as octane. The liquid oligomerization products can be produced in wide range of viscosities including the direct production of low viscosity lubricants having high viscosity index.

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