Process for preparing halogenated benzene derivatives
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United States of America Patent
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Oct 9, 1990
Grant Date -
N/A
app pub date -
Feb 21, 1989
filing date -
Feb 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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