公开(公告)号：DE2619234A1

公开(公告)日：1976-11-25

申请号：DE2619234

申请日：1976-04-30

Applicant: STAMICARBON

Inventor： DE ROOIJ ABRAHAM HERMANUS ,  GOETTSCH REIJER

IPC: C01C1/24 ,  C07D201/16 ,  C07D233/10

公开(公告)号：DE2260014A1

公开(公告)日：1973-06-14

申请号：DE2260014

申请日：1972-12-07

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM HERMANUS DE ,  GOETTSCH REIJER

IPC: B01D11/04 ,  B01D9/02 ,  C07D201/04 ,  C07D201/16 ,  C07D41/06

Abstract: A process for recovering lactams from a mixture of one or more lactams and sulphuric acid is disclosed, wherein the sulphuric acid is neutralized with ammonia or an ammonium salt to ammonium hydrogen sulfate in the presence of a lactam solvent. The neutralization produces a melt of ammonium hydrogen sulfate and a solution of lactam in the organic solvent, and the melt is readily separated from the solution. The lactam can then be recovered from the organic solvent.