Process for generating pure benzene from reformed gasoline
AssigneeKrupp Uhde GmbH
InventorsGerd Emmrich, Hans-Christoph Schneider, Helmut Gehrke, Bernhard Firnhaber
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Abstract
A process is disclosed for generating pure aromatic compounds from a reformed gasoline which contains aromatic compounds, olefins, diolefin, and triolefins, which comprises the steps of: (a) selectively hydrogenating the olefins, diolefins and triolefins in the reformed gasoline to obtain a mixture of hydrogenated, non-aromatic compounds and aromatic compounds; and (b) separating the aromatic compounds from the hydrogenated, non-aromatic compounds in the mixture formed during step (a) by either extractive distillation, liquid--liquid extraction or both to obtain the pure aromatic compounds.
Claims9
A process for generating pure benzene from a reformed gasoline cut which contains benzene as a principal aromatic compound and which contains olefins, diolefins including methyl-1,3-cyclopentadiene, and triolefins, which consists essentially of the steps of:
- (a) selectively and completely hydrogenating in a single step the diolefins including methyl-1,3-cyclopentadiene and triolefins in the reformed gasoline to obtain a mixture of hydrogenated, non-aromatic compounds and aromatic compounds wherein the amount of the benzene undergoing hydrogenation is about 0.29% to 1% and the bromine index of the mixture is higher than 330 mg Br/100 g;
- and
- (b) following step (a), separating the aromatic compounds from the hydrogenated, non-aromatic compounds in the mixture formed during step (a) by either extractive distillation, liquid--liquid extraction or both to obtain the pure benzene having a Bromine index of less than 20 mg Br.sub.2 /100 g and a content of methyl-1,3-cyclopentadiene of less than 1 ppm.
Dependencies are inferred from the claim text.