| 摘要 |
<p>1373331 #-Caprolactam KANEBO Ltd 13 Feb 1973 [15 Feb 1972] 7117/73 Heading C2C #-Caprolactam is produced by bringing N- acetyl-#-caprolactam into contact, in the gaseous phase, with an acid catalyst or basic catalyst in the presence of water vapour. Preferred acid catalysts are silica-alumina catalysts, certain zeolite catalysts, silica-magnesia catalysts, silica-zirconia catalysts, alumina-boria catalysts, alumina catalysts containing fluorine, and phosphoric acid catalysts supported on a carrier. Suitable basic catalysts are NaOH, KOH, LiOH, Ba(OH) 2 , Na 2 CO 3 and K 2 CO 3 , all supported on a carrier. Suitable carriers are silica gel, alumina, Celite (Trade Mark), or active carbon.</p> |
