| 摘要 |
<p>Caprolactam is obtained from caprolactam-containing polymers in the presence of a base under reduced pressure by depolymerizing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of: from 50 to 99.99 % by weight of a polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]-; from 0.01 to 50 % by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes; from 0 to 10 % by weight of organic and/or inorganic additives; from 0 to 40 % by weight of non-polyamide-containing polymers and, from 0 to 20 % by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam; in at least two depolymerization reactors connected in series.</p> |
