Devices for removing acetic acid from cyclohexane in the production of adipic acid
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United States of America Patent
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Jan 23, 2001
Grant Date -
N/A
app pub date -
Jan 27, 1999
filing date -
Sep 19, 1997
priority date (Note) -
Expired
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Abstract
This invention relates to methods and devices for removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitated by introduction of additional cyclohexane. The removal of acetic acid is preferably conducted by use of rather small amounts of wash-water in one to three stage extractors. A two stage reactor is preferable as being more efficient.
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