Process for the separation of olefins from paraffins

摘要

A process for the separation of internal olefins from a mixed feedstock comprising internal olefins and paraffins, wherein said process comprises:
(i) reacting said mixed feedstock with a trialkylaluminium compound in the presence of an isomerisation/displacement catalyst in order to cause isomerisation of the internal olefins and to displace alkyl group(s) from said trialkylaluminium compound to form an alkylaluminium compound wherein at least one of the alkyl groups bound to the aluminium is an alkyl group which has been derived from the isomerisation of said internal olefins; and
(ii) reacting the alkylaluminium compound formed in step (i) with one or more displacement olefins in the presence of an isomerisation/displacement catalyst in order to cause the displacement olefins to optionally isomerise and to displace alkyl group(s) from the alkylaluminium compound to form a trialkylaluminium compound and to liberate the 1-olefins derived from the internal olefins of the mixed feedstock, which 1-olefins are isomerised to form internal olefins.