发明名称 |
Process for depolymerizing nylon-containing waste to form caprolactam |
摘要 |
The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250 DEG C. to about 400 DEG C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.
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申请公布号 |
US5932724(A) |
申请公布日期 |
1999.08.03 |
申请号 |
US19970843502 |
申请日期 |
1997.04.16 |
申请人 |
ALLIEDSIGNAL INC.;DSM N.V. |
发明人 |
SIFNIADES, STYLIANOS;LEVY, ALAN BART;HENDRIX, JAN AGNES JOZEF |
分类号 |
C07D201/12;(IPC1-7):C07D201/12 |
主分类号 |
C07D201/12 |
代理机构 |
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主权项 |
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地址 |
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