Process for producing p-xylene

Details Process for producing p-xylene Process for producing p-xylene

2005-03-15

2005-03-15

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

C585S470000, C585S475000, C585S479000

Reexamination Certificate

active

06867339

ABSTRACT:
A complete new process for producing p-xylene is provided to solve the problems in the prior arts of the great amount of benzene as a by-product and the requirement of low content of C10+heavy aromatics in the feedstock. The process comprises first subjecting benzene and C9+aromatics to alkyl transfer reaction to produce toluene and C8aromatics, then conducting toluene selective disproportionation, and molecular sieve adsorptive separation and isomerization of C8aromatics, to obtain p-xylene.

REFERENCES:
patent: 2795629 (1957-06-01), Boedeker
patent: 3551510 (1970-12-01), Pollitzer et al.
patent: 4341914 (1982-07-01), Berger
patent: 1217369 (1999-05-01), None
patent: 235948 (1999-11-01), None

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