Patent ID: 7612246
Filing Date: 2009-11-03
Classification: C10G,C10L

Abstract:
1. A process for the production of a RON isomerate that is at least equal to 80 and for co-production of an aromatic fraction that for the most part contains toluene, staffing from a C7 fraction containing paraffins, naphthenes and aromatic compounds in any proportion, whereby said process employs at least one step comprising passing fresh feedstock ( 11 ) into an extractive distillation unit for extracting aromatic compounds (EA) so as to produce an aromatic fraction ( 23 ) containing mostly toluene, and a dearomatized C7 fraction ( 12 ) that is introduced into a distillation column (CD) from which are extracted: a) A top flow ( b) A lateral flow ( c) A bottom flow ( within said isomerization unit (IS), conducting at least one step of isomerization of linear paraffins and mono-branched paraffins into multi-branched paraffins wherein the resultant isomerate contains less than 1% by weight of aromatic compounds, and at least one step of separating resultant stream of linear and mono-branched paraffins from di- and tri-branched paraffins.