Catalyst of mixed fluorosulfonic acids

A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide;

• and B) a mobile 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;
• wherein
• Formula 1a is R1—CF2—SO3H,
• Formula 1b is (R1—CF2—SO2)2NH,
• Formula 1c is R1—CF2—SO2—NH—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 HSO3—CF2—R3—CF2—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.