公开(公告)号：AR227961A1

公开(公告)日：1982-12-30

申请号：AR28841982

申请日：1982-02-12

Applicant: FRIULI CHIM SPA

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

公开(公告)号：BR8006999A

公开(公告)日：1981-05-05

申请号：BR8006999

申请日：1980-10-30

Applicant: SNIA VISCOSA

Inventor： CATONI M ,  ROSSI P

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

公开(公告)号：IT8119801D0

公开(公告)日：1981-02-17

申请号：IT1980181

申请日：1981-02-17

Applicant: FRIULI CHIM SPA

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

IPC: C07C51/48 ,  C07C20060101 ,  C07C13/18 ,  C07C51/42 ,  C07C61/08 ,  C07C63/06 ,  C07D201/10 ,  C07C

公开(公告)号：PT71898A

公开(公告)日：1980-11-01

申请号：PT7189880

申请日：1980-10-10

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07C

公开(公告)号：IT7927018D0

公开(公告)日：1979-11-02

申请号：IT2701879

申请日：1979-11-02

Applicant: SNIA VISCOSA

Inventor： PAOLO ROSSI PIER ,  MARIO CATONI

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07D

公开(公告)号：DK139964C

公开(公告)日：1979-10-22

申请号：DK41373

申请日：1973-01-25

Applicant: SNIA VISCOSA SOCIETA NAZIONALE INDUSTRIA APPLICAZIONI VISCO

Inventor： GIUFFRE L ,  SIOLI G ,  MATTONE R

IPC: C07D201/02 ,  C07C67/00 ,  C07C201/00 ,  C07C207/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D201/10 ,  C07D205/08 ,  C07D207/263 ,  C07D223/02

Abstract: A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.

公开(公告)号：FR2417501A1

公开(公告)日：1979-09-14

申请号：FR7804571

申请日：1978-02-17

Applicant: ATO CHIMIE

Inventor： MICHEL JEAN-CLAUDE ,  POTIN PHILIPPE

IPC: C07D201/10 ,  C07D201/04 ,  C07D227/08

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：GB2014572A

公开(公告)日：1979-08-30

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：DE2905680A1

公开(公告)日：1979-08-30

申请号：DE2905680

申请日：1979-02-14

Applicant: ATO CHIMIE

Inventor： MICHEL JEAN-CLAUDE ,  POTIN PHILIPPE

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：DK139964B

公开(公告)日：1979-05-28

申请号：DK41373

申请日：1973-01-25

Applicant: SNIA VISCOSA

Inventor： GIUFFRE LUIGI ,  SIOLI GIANCARLO ,  MATTONE ROBERTO

IPC: C07D201/02 ,  C07C67/00 ,  C07C201/00 ,  C07C207/00 ,  C07C239/00 ,  C07C251/46 ,  C07D201/04 ,  C07D201/10 ,  C07D205/08 ,  C07D207/263 ,  C07D223/02 ,  C07D223/10

Abstract: A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.