Transalkylation process with recycle of C.sub.10 hydrocarbons

Details Transalkylation process with recycle of C.sub.10 hydrocarbons Transalkylation process with recycle of C.sub.10 hydrocarbons

1980-12-22

1982-07-27

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By alkyl or aryl transfer between molecules, e.g.,...

C07C 522

Patent

active

043419143

ABSTRACT:
A transalkylation process useful in producing C.sub.8 alkyl-aromatic hydrocarbons from C.sub.9 alkylaromatic hydrocarbons or a mixture of C.sub.7 and C.sub.9 alkylaromatic hydrocarbons. The effluent of a transalkylation zone is passed into a fractionation zone and is therein preferably separated into a light recycle stream comprising benzene and toluene and a heavy recycle stream comprising C.sub.9 and C.sub.10 alkylaromatic hydrocarbons, with both recycle streams being returned into the transalkylation zone. The recycling of C.sub.10 hydrocarbons to the transalkylation zone increases the yield of C.sub.8 alkylaromatic hydrocarbons from the transalkylation process. The transalkylation step is preferably integrated with a paraxylene separation zone and a xylene isomerization zone operated as a continuous loop receiving mixed xylenes from the transalkylation zone feed and effluent fractionation zones.

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