PROCESS FOR DEPOLYMERIZING NYLON-CONTAINING WASTE TO FORM CAPROLACTAM BY SUPERHEATED STEAM IN THE ABSENCE OF CATALYSTS
摘要
<p>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.</p>
申请公布号
EP0874817(B2)
申请公布日期
2015.12.02
申请号
EP19960943716
申请日期
1996.12.06
申请人
ALLIEDSIGNAL INC.;KONINKLIJKE DSM N.V.
发明人
SIFNIADES, STYLIANOS;LEVY, ALAN, BART;HENDRIX, JAN, AGNES, JOZEF