Process for preparing halogenated benzene derivatives

Details Process for preparing halogenated benzene derivatives Process for preparing halogenated benzene derivatives

1989-02-21

1990-10-09

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570202, C07C 1737

Patent

active

049622455

ABSTRACT:
By a process for preparing halogenated benzene derivatives comprising distilling or stripping a mixture of the isomers of a halogenated benzene derivative containing a hydrogen halide to remove the hydrogen halide from the isomeric mixture of the halogenated benzene derivative and then contacting with a zeolite adsorbent for selectivity separating the desired isomer of the halogenated benzene derivative, it is possible to prevent from degrading the zeolite adsorbent. And it is possible to separate selectively industrially an desired isomer of the halogenated benzene derivative for a long time without reduction of productivity and to separate selectively the desired isomer in high purity.

REFERENCES:
patent: 4254062 (1981-03-01), Wambach et al.
patent: 4650915 (1987-03-01), Arpe et al.
patent: 4774371 (1988-09-01), Miwa et al.
patent: 4777306 (1988-10-01), Kaneshiki et al.
patent: 4814526 (1989-03-01), Rule et al.

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