PROCESS FOR PREPARING C4-C5 ISOOLEFINS

摘要

1505404 Isomerizing alkenes SNAMPROGETTI SpA 17 July 1975 [2 Aug 1974] 30141/75 Heading C5E Alkenes are isomerized with a silica-surface - modified alumina catalyst which has been produced by impregnating alumina with an organosilicon compound containing radicals, at least one of which is other than OH, pyrolysably bound to silicon, and subjecting the treated alumina (substantially free from unreacted impregnating material and any volatile reaction products) to calcining. The alumina may contain 0À5-12 wt. per cent of surface-modifying silica. Preferred organosilicon compounds are esters of orthosilicic acid. Examples describe the isomerization of butenes and pentenes.