Patent ID: 6846903

Claim:
A process for the preparation of polyisobutenes by cationic polymerization of isobutene or isobutene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride as a catalyst, the catalytic activity of the boron trifluoride being reduced partially or fully eliminated at a desired time by means of a solid deactivator, wherein the solid deactivator is insoluble in the reaction mixture and has pendant, boron trifluoride-binding primary, secondary, tertiary amine groups and/or quaternary ammonium ions bound to a carriers, wherein the primary amino groups are derived from primary amines of the formula: R 1 —NH 2 , the secondary amino groups are derived from secondary amines of the formula: R 2 R 3 —NH, the tertiary amino groups are derived from tertiary amines of the formula: R 4 R 5 R 6 —N and the quaternary ammonium ions are derived from quaternary ammonium ions of the formula: R 7 R 8 R 9 R 10 —N + , wherein R 1 , at least one of R 2 and R 3 , at least one of R 4 to R 6 and at least one of R 7 to R 10 are bound to said carrier with the R groups being C 1 -C 10 -alkyl, C 6 -C 10 -aryl, C 7 -C 15 -arylalkyl or C 1 -C 8 -alkylcarbonyl.