Integrated process for producing xylenes and high purity...

Details Integrated process for producing xylenes and high purity... Integrated process for producing xylenes and high purity...

2008-06-25

2009-12-29

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

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

C585S475000

Reexamination Certificate

active

07638669

ABSTRACT:
Processes and apparatus are provided that provide high yields of xylenes per unit of aromatic-containing feed while enabling a high purity benzene co-product to be obtained without the need for an extraction or distillation to remove C6naphthenes. The processes of this invention include a transalkylation section and a disproportionation section in the benzene and toluene-containing feed is directly provided to the transalkylation section and in which a benzene recycle loop in the transalkylation section isolates the disproportionation section from C6naphthenes.

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U.S. Appl. No. 12/146,043, filed Jun. 25, 2008, Edward M. Casey et al., USPTO Notice of Allowance mailed Mar. 6, 2009.

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