Method of recovering caprolactam from mixed waste
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United States of America Patent
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Aug 31, 1993
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app pub date -
Jun 25, 1992
filing date -
Jun 25, 1992
priority date (Note) -
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Abstract
A process for recovering caprolactam from waste containing both polycaprolactam and materials which are insoluble in acidic solvents for polycaprolactam includes agitating the waste in an acidic solvent capable of dissolving polycaprolactam without degrading the acid insoluble materials, separating the solution containing polycaprolactam from the acid insoluble materials, feeding the solution containing the polycaprolactam to a depolymerization reactor, without substantially precipitating the polycaprolactam and depolymerizing the polycaprolactam solution to obtain substantially pure caprolactam.
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