公开(公告)号：BR8404332A

公开(公告)日：1985-07-30

申请号：BR8404332

申请日：1984-08-30

Applicant: STAMICARBON

Inventor： PLANTEMA OTTO GERRIT ,  JETTEN ARNOLD GODFRIED MARIA ,  HAASEN NICOLAAS FRANCISCUS

IPC: C07D201/16 ,  C07D223/10

Abstract: The invention relates to a process for recovering capro- actam from a residue remaining in a destillation, under reduced pressure, of impure caprolactame, obtained by rearrangement of cyclohexanone-oxime with sulphuric acid or oleum. The process consists of a destillation of the residue under reduced pressure, followed by a hydrogenation of the caprolactam containing destillate in an aqueous medium, from which hydrogenation-product caprolactam is recovered.

公开(公告)号：DE3166798D1

公开(公告)日：1984-11-29

申请号：DE3166798

申请日：1981-05-29

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  JETTEN ARNOLD GODFRIED MARIA

IPC: C07D207/26 ,  C07D201/16

Abstract: In a distillation process 2-pyrrolidones obtained from succinonitrile are purified by treating the impure liquid pyrrolidone with a strong base, fractionally distilling this product to yield, as distillate, polymerization grade purified 2-pyrrolidone, mixing the 2-pyrrolidone-containing residue from the fractional distillation with water and an acid, and extracting purified 2-pyrrolidone from the water/acid mixture. The latter purified 2-pyrrolidone products are suitable for recycling to the pyrrolidone synthesis or to make other products.

公开(公告)号：DE2861562D1

公开(公告)日：1982-03-04

申请号：DE2861562

申请日：1978-11-29

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  JETTEN ARNOLD GODFRIED MARIA

IPC: C07D207/263 ,  C07D201/16