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

2009-06-09

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

07544848

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.

REFERENCES:
patent: 3812197 (1974-05-01), Suggitt et al.
patent: 4341914 (1982-07-01), Berger
patent: 6740788 (2004-05-01), Maher et al.
patent: 2004/0186330 (2004-09-01), Kong et al.
patent: 2004/0186332 (2004-09-01), Kong et al.
Robert A. Meyers,Handbook of Petroleum Refining Processes, 2d. Edition, 1997, Part 2.

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