Patent ID: 9199891
Filing Date: 2015-12-01
Classification: C07C,C10G

Abstract:
1. A process for reducing the benzene content of gasoline by alkylating benzene contained in a benzene-containing refinery gasoline stream, said process comprising contacting said benzene-containing refinery gasoline stream under alkylation conditions with an alkylating agent selected from one or more C2 to C5 olefins in at least a first alkylation reaction zone and a second alkylation reaction zone connected in series to produce an alkylated effluent, which has reduced benzene content as compared with said refinery gasoline stream, wherein all of the refinery gasoline stream is introduced into the first alkylation reaction stage, wherein an aliquot of the alkylated effluent from the second alkylation zone is recycled and introduced to the second, but not the first, alkylation reaction zone, and wherein the refinery gasoline stream comprises at least 0.1 wt. % of at least one C6 to C8 olefin.