公开(公告)号：DE2803657A1

公开(公告)日：1978-08-03

申请号：DE2803657

申请日：1978-01-27

Applicant: STAMICARBON

Inventor： WASSEN WILLEM JOSEPH ,  ZWART RUDOLF LAMBERTUS

IPC: C07D201/16 ,  C07D201/00

公开(公告)号：CH629784A5

公开(公告)日：1982-05-14

申请号：CH792477

申请日：1977-06-28

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  ZWART RUDOLF LAMBERTUS

IPC: C01C1/24 ,  C07D201/16 ,  C07D223/10

公开(公告)号：CH632250A5

公开(公告)日：1982-09-30

申请号：CH94178

申请日：1978-01-27

Applicant: STAMICARBON

Inventor： WASSEN WILLEM JOSEPH ,  ZWART RUDOLF LAMBERTUS

IPC: C07D201/16 ,  C07D223/10

公开(公告)号：MX4280E

公开(公告)日：1982-03-11

申请号：MX584477

申请日：1977-06-27

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  ZWART RUDOLF LAMBERTUS

IPC: C01C1/24 ,  C07D201/16 ,  C07D223/10

Abstract: The process is directed to recovering epsilon -caprolactam from a reaction mixture containing epsilon -caprolactum and sulfuric acid by separating the caprolactam from the sulfuric acid by an extraction. Extraction includes the steps of neutralizing a part of said sulfuric acid with ammonia, ammonium sulfate, ammonium hydrogen sulfate or mixture thereof, to form an ammonium salt of at least part of said sulfuric acid as a neutralization product, thermally decomposing a part of the ammonium salt formed to produce a gaseous mixture of ammonia and sulfur dioxide and contacting another portion of the neutralization product with said gaseous mixture to produce ammonium hydrogen sulfate, ammonium sulfate or both, and neutralizing at least a part of the sulfuric acid in the reaction mixture with said ammonium hydrogen sulfate, ammonium sulfate or both.

公开(公告)号：DE2728606A1

公开(公告)日：1977-12-29

申请号：DE2728606

申请日：1977-06-24

Applicant: STAMICARBON

Inventor： GOETTSCH REIJER ,  ZWART RUDOLF LAMBERTUS

IPC: C01C1/24 ,  C07D201/16

Abstract: The process is directed to recovering epsilon -caprolactam from a reaction mixture containing epsilon -caprolactum and sulfuric acid by separating the caprolactam from the sulfuric acid by an extraction. Extraction includes the steps of neutralizing a part of said sulfuric acid with ammonia, ammonium sulfate, ammonium hydrogen sulfate or mixture thereof, to form an ammonium salt of at least part of said sulfuric acid as a neutralization product, thermally decomposing a part of the ammonium salt formed to produce a gaseous mixture of ammonia and sulfur dioxide and contacting another portion of the neutralization product with said gaseous mixture to produce ammonium hydrogen sulfate, ammonium sulfate or both, and neutralizing at least a part of the sulfuric acid in the reaction mixture with said ammonium hydrogen sulfate, ammonium sulfate or both.

公开(公告)号：MX5326E

公开(公告)日：1983-06-22

申请号：MX680178

申请日：1978-01-27

Applicant: STAMICARBON

Inventor： WASSEN WILLEM JOSEPH ,  ZWART RUDOLF LAMBERTUS

IPC: C07D201/16 ,  C07D223/10