Process for the preparation of a mixture of .epsilon.-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide
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United States of America Patent
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Jan 4, 2000
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N/A
app pub date -
Aug 21, 1998
filing date -
Feb 23, 1996
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Abstract
Process for the preparation of a mixture of .epsilon.-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide by heating an aqueous mixture containing ammonia and oligomers of 6-aminocaproic acid and/or of 6-aminocaproic amide, the aqueous mixture containing 0.5-7 wt. % of equivalent ammonia (calculated as NH.sub.3) and the temperature lying between 280.degree. C. and 330.degree. C., in which by 'equivalent ammonia' is meant free ammonia and ammonia present in the form of a terminal amide group of one of the compounds present in the aqueous mixture.
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