公开(公告)号：IN155491B

公开(公告)日：1985-02-09

申请号：IN1157CA1980

申请日：1980-10-13

Applicant: SNIA VISCOSA

Inventor： ROSSI PIER PAOLO ,  CATONI MARIO

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07D41/06

公开(公告)号：AU532673B2

公开(公告)日：1983-10-06

申请号：AU6400580

申请日：1980-10-31

Applicant: SNIA VISCOSA

Inventor： ROSSI PIER PAOLO ,  CATONI MARIO

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07D223/10

公开(公告)号：CH636083A5

公开(公告)日：1983-05-13

申请号：CH155079

申请日：1979-02-16

Applicant: ATO CHIMIE

Inventor： MICHEL JEAN-CLAUDE ,  POTIN PHILIPPE

IPC: C07D201/10 ,  C07D201/04

公开(公告)号：BR8200837A

公开(公告)日：1982-12-28

申请号：BR8200837

申请日：1982-02-16

Applicant: FRIULI CHIM SPA

Inventor： DANATI IVO ,  ROSSI PIETRO PAOLO ,  ASTARITA DOMENICO ,  CATONI MARIO

IPC: C07C51/48 ,  C07C20060101 ,  C07C13/18 ,  C07C51/42 ,  C07C61/08 ,  C07C63/06 ,  C07D201/10

公开(公告)号：GB2014572B

公开(公告)日：1982-07-14

申请号：GB7905164

申请日：1979-02-14

Applicant: ATO CHIMIE

IPC: C07D201/10 ,  C07D201/04

Abstract: The invention relates to a process for the preparation of lactames according to the so-called "Beckmann rearrangement" which consists in isomerizing oximes in a sulfuric solution, the weight ratio percentage of sulfuric acid to the combined amount of sulfuric acid and water being raised to a value above that of the sulfuric solution feed.

公开(公告)号：SU938741A3

公开(公告)日：1982-06-23

申请号：SU2729503

申请日：1979-02-16

Applicant: ATO CHIMIE

Inventor： MISHEL ZHAN-KLOD ,  POTEN FILIPP

IPC: C07D201/10 ,  C07D201/04

Abstract: The invention relates to a process for the preparation of lactames according to the so-called "Beckmann rearrangement" which consists in isomerizing oximes in a sulfuric solution, the weight ratio percentage of sulfuric acid to the combined amount of sulfuric acid and water being raised to a value above that of the sulfuric solution feed.

公开(公告)号：GB2061927A

公开(公告)日：1981-05-20

申请号：GB8032495

申请日：1980-10-08

Applicant: SNIA VISCOSA

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07D207/12

公开(公告)号：AU6400580A

公开(公告)日：1981-05-07

申请号：AU6400580

申请日：1980-10-31

Applicant: SNIA VISOCSA SOC NAZIONALE INDUSTRIA APPLICAZIONE VISCOSA SPA

Inventor： ROSSI P P ,  CATONI M

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07D223/10

公开(公告)号：DE2203945C3

公开(公告)日：1980-11-20

申请号：DE2203945

申请日：1972-01-28

Applicant: BAYER AG, 5090 LEVERKUSEN

Inventor： IMMEL, OTTO, DR. ,  SCHWARZ, HANS- HELMUT, DR.

IPC: B01D11/04 ,  C07D201/16 ,  C07D201/10

Abstract: Object of the invention is a process for the purification of epsilon -caprolactam prepared either by Beckmann rearrangement or by rearrangement of cyclohexanoxime in the gaseous phase or by depolymerisation of polyamide waste comprising treating the solid, finely-divided crude lactam with an organic solvent for a period of up to 60 hours at a temperature from 0 DEG to 50 DEG C. According to the purification process many impurities could be removed without a substantial decrease in the yield of the purified caprolactam.

公开(公告)号：DE2203945B2

公开(公告)日：1980-03-27

申请号：DE2203945

申请日：1972-01-28

Applicant: BAYER AG, 5090 LEVERKUSEN

Inventor： IMMEL, OTTO, DR. ,  SCHWARZ, HANS- HELMUT, DR.

IPC: B01D11/04 ,  C07D201/16 ,  C07D201/10

Abstract: Object of the invention is a process for the purification of epsilon -caprolactam prepared either by Beckmann rearrangement or by rearrangement of cyclohexanoxime in the gaseous phase or by depolymerisation of polyamide waste comprising treating the solid, finely-divided crude lactam with an organic solvent for a period of up to 60 hours at a temperature from 0 DEG to 50 DEG C. According to the purification process many impurities could be removed without a substantial decrease in the yield of the purified caprolactam.