公开(公告)号：US20240117142A1

公开(公告)日：2024-04-11

申请号：US18265702

申请日：2021-12-14

Applicant: BASF SE

Inventor： Caroline BEYER ,  Florian RICHTER

IPC: C08J11/16 ,  C07D223/10

CPC classification number: C08J11/16 ,  C07D223/10 ,  C08J2375/04 ,  C08J2377/02 ,  Y02W30/62

Abstract: A process for obtaining caprolactam from mixtures of caprolactam-containing polymers and polyurethane-containing polymers, in particular polyurethane block copolymers, by depolymerization, wherein the depolymerization of the mixture is performed in the presence of 0.05% to 5% by weight of a base at a temperature of 250° C. to 350° C. and a pressure of 5 to 700 mbar and wherein the caprolactam is obtained in gaseous form.