Patent ID: 6593505
Filing Date: 2003-07-15
Classification: B01J,C07C

Abstract:
An improved process for isomerization of at least one alkene wherein the improvement comprises conducting the isomerization in the presence of a catalyst comprising A) a heterogeneous acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid on a support, and a sulfated metal oxide; and B) a homogeneous acid component selected from the group consisting of chlorosulfonic acid, fluorosulfonic acid, a fluorinated monosulfonic acid of Formula 1a, a fluorinated sulfonimide of Formula 1b or 1c, a fluorinated disulfonic acid of Formula 2, and an adjunct acid mixture which is 1) a Bronsted/Lewis acid mixture wherein the Bronsted acid is selected from the group consisting of HF, HSO3F, CF3SO3H, and HCF2CF2SO3H and the Lewis acid is selected from the group consisting of SbF5, AsF5, NbF5, and TaF5 or 2) a mixture of said Bronsted/Lewis acid mixture with a compound of Formula 1a, Formula 1b or Formula 1c; whereinFormula 1a is R1â€”CF2â€”SO3H, Formula 1b is (R1â€”CF2â€”SO2)2NH, Formula 1c is R1â€”CF2â€”SO2â€”NHâ€”R2, wherein each R1 is independently Cl, F, H, branched or straight chain C1 to C10 alkyl optionally interrupted by oxygen atoms and optionally substituted with Cl or F, C6 to C12 aryl, or C6 to C12 aryl substituted with up to two groups selected from the group consisting of Cl, F, C1 to C10 alkyl, and C1 to C10 alkoxy;each R2 is independently branched or straight chain C1 to C10 alkyl optionally interrupted by oxygen atoms and optionally substituted with Cl or F, C6 to C12 aryl, or C6 to C12 aryl substituted with up to two groups selected from the group consisting of Cl, F, C1 to C10 alkyl, and C1 to C10 alkoxy; and Formula 2 is HSO3â€”CF2â€”R3â€”CF2â€”SO3H wherein R3 is a divalent C1 to C10 alkylene optionally interrupted by oxygen atoms and optionally substituted with Cl or F, a C6 to C12 arylene, or C6 to C12 arylene substituted with up to two groups selected from the group consisting of Cl, F, C1 to C10 alkyl, and C1 to C10 alkoxy.