Method for removing impurities from caprolactam
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United States of America Patent
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Jan 19, 1988
Issued Date -
N/A
app pub date -
Sep 2, 1983
filing date -
Jun 26, 1981
priority date (Note) -
Expired
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Abstract
A method for removing impurities from caprolactam is disclosed. The method comprises the sequential steps of treating the impure caprolactam with phosphorus pentoxide so that the impurities react therewith to form high boiling species and then distilling the so treated impure lactam to recover substantially pure caprolactam as overhead, with the impurities remaining as bottoms.
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