Patent ID: 6448458
Filing Date: 2002-09-10
Classification: C07C,C10M

Abstract:
A modified alkylbenzene composition, wherein the modified alkylbenzene is produced by a process comprising the steps of:a) passing a feed stream containing C8-C28 paraffins to an isomerization zone, operating the isomerization zone at isomerization conditions sufficient to isomerize paraffins, and recovering from the isomerization zone an isomerized product stream comprising paraffins; b) passing at least a portion of the isomerized product stream to a dehydrogenation zone, operating the dehydrogenation zone at dehydrogenation conditions sufficient to dehydrogenate paraffins, and recovering from the dehydrogenation zone a dehydrogenated product stream comprising monoolefins and paraffins, wherein the monoolefins in the dehydrogenated product stream have from about 8 to about 28 carbon atoms, and wherein at least a portion of. the monoolefins in the dehydrogenated product stream have 3 or 4 primary carbon atoms and no quaternary carbon atoms; c) passing an aryl compound and at least a portion of the dehydrogenated product stream comprising monoolefins to an alkylation zone, operating the alkylation zone at alkylation conditions sufficient to alkylate the aryl compound with monoolefins in the presence of an alkylation catalyst to form arylalkanes comprising molecules having one aryl portion and one aliphatic alkyl portion containing from about 8 to about 28 carbon atoms; wherein at least a portion of the arylalkanes formed in the alkylation zone have 2, 3, or 4 primary carbon atoms and no quaternary carbon atoms except for any quaternary carbon atom bonded by a carbon-carbon bond with a carbon atom of the aryl portion; and wherein the alkylation has a selectivity to 2-phenyl-alkanes of from 40 to 100 and a selectivity to internal quaternary phenyl-alkanes of less than 10; d) recovering from the alkylation zone an alkylate product stream comprising arylalkanes and a recycle stream comprising paraffins; and e) passing at least a portion of the recycle stream to the isomerization zone or the dehydrogenation zone.