Isomerization of vinylidene olefins

摘要

A process for isomerization of vinylidene olefins at least in part to tri-substituted ethylene compound which process comprises contacting an olefinic feedstock, containing mostly vinyl olefins and minor amounts of vinylidene olefins, with a catalyst comprising LZ-Y52 zeolite so as to isomerize the vinylidene olefins to the tri-substituted ethylene compounds without losing substantial amounts of the vinyl olefins to side products. A process is preferably applied to a feedstock such as octene-1 containing 2-ethyl-hexane-1 and the 2-ethyl-hexene-1 is isomerized to 3-methyl-heptene-2 and 3-methyl-heptene-3 while retaining all or most all of the octene-1.