Method for the production of polyisobutene

Details Method for the production of polyisobutene Method for the production of polyisobutene

2003-09-18

2009-02-03

Caldarola, Glenn (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By addition of entire unsaturated molecules, e.g.,...

C585S520000, C526S209000, C526S210000, C526S212000, C526S237000, C526S348700

Reexamination Certificate

active

07485764

ABSTRACT:
A process for the preparation of polyisobutene containing at least 75 mol % of terminal vinylidene groups, in which isobutene or an isobutene-containing hydrocarbon mixture is polymerized in the liquid phase in the presence of a boron trifluoride complex catalyst having the compositionin-line-formulae description="In-line Formulae" end="lead"?a(BF3):b(Co1):c(Co2)in-line-formulae description="In-line Formulae" end="tail"?where Co1 is at least one tertiary alcohol, Co2 is at least one compound selected from water, primary alcohols, secondary alcohols, dialkyl ethers, alkanecarboxylic acids and phenols, the ratio c:b is from 0.9 to 1.8 and the ratio (b+c):a is from 0.9 to 3.0, is described.

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