PROCESS FOR PREPARING BUTENE OLIGOMER FROM FIELD BUTANE

摘要

Disclosed is a process for preparing di-iso-butane and optionally butene oligomers from field butane, in which (a) the field butane 1 is dehydrogenated in a dehydrogenation stage 2, (b) the dehydrogenation mixture 3 is oligomerized in an oligomerization stage 8, (c) the oligomerization mixture is separated into di-iso-butene, and residual gas, and (d) the di- iso-butene is hydrogenated to give di-iso-butane. The di-iso- butane can be used as fuel additive. The oligomerization products di-n-butene and tri-butene are useful as starting materials for preparing plasticizer alcohols and detergent bases. By incorporating an isomerization stage 24 or not, the process may be controlled in such a manner that the only di- butene formed is di-iso-butene or both di-iso-butene and di-n- butene.