公开(公告)号：DK138333C

公开(公告)日：1979-01-29

申请号：DK540275

申请日：1975-11-28

Applicant: SNIA VISCOSA SOCIETA NAZIONALE INDUSTRIA APPLICAZIONI VISCO

Inventor： GIUFFRE L ,  SIOLI G ,  MATTONE R

IPC: C07G99/00

公开(公告)号：DK133150C

公开(公告)日：1976-08-30

申请号：DK356573

申请日：1973-06-27

Applicant: SNIA VISCOSA

Inventor： MATTONE R ,  SIOLI G ,  GIUFFRE L

IPC: B01D11/04 ,  C07D201/16

Abstract: A method is disclosed for recovering lactams from acidic reaction mixtures, the improvement consisting in the fact that the extractant is an alkylsubstituted phenol the alkyl chain of which contains at least three carbon atoms, the alkyl substituent being capable of imparting to the phenol a lipophilic character. Monosubstituted and disubstituted phenols, such as isopropyl phenols, sec. and tert. butyl phenols, sec. and tert. amylphenols, di-sec. amylphenols and di-tert. amylphenols are preferred.

公开(公告)号：SE7602498A

公开(公告)日：1976-02-26

申请号：SE7602498

申请日：1976-02-26

Applicant: SNIA VISCOSA

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 ,  C07C13/28

CPC classification number: C07D201/10

公开(公告)号：DK540275A

公开(公告)日：1975-11-28

申请号：DK540275

申请日：1975-11-28

Applicant: SNIA VISCOSA

Inventor： GIUFFRE L ,  SIOLI G ,  MATTONE R

IPC: C07G99/00

公开(公告)号：ZA7304342B

公开(公告)日：1974-05-29

申请号：ZA7304342

申请日：1973-06-26

Applicant: SNIA VISCOSA

Inventor： MATTONE R ,  SIOLI G ,  GIUFFRE L

IPC: B01D11/04 ,  C07D201/16 ,  C07D

CPC classification number: C07D201/16

公开(公告)号：ZA7304341B

公开(公告)日：1974-05-29

申请号：ZA7304341

申请日：1973-06-26

Applicant: SNIA VISCOSA

Inventor： MATTONE R ,  SIOLI G ,  GIUFFRE L

IPC: B01D3/00 ,  B01D9/02 ,  C07D201/16 ,  C07D

CPC classification number: C07D201/16

公开(公告)号：ZA7101118B

公开(公告)日：1971-11-24

申请号：ZA7101118

申请日：1971-02-22

Applicant: SNIA VISCOSA

Inventor： SIOLI G ,  MATERA G ,  GIUFFRE L ,  RIGHI F

IPC: C07D239/42 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/89 ,  C07C49/88 ,  C07C51/00 ,  C07C61/09 ,  C07C67/00 ,  C07D307/89 ,  C07C

CPC classification number: C07C45/89 ,  C07C49/88

公开(公告)号：ZA704436B

公开(公告)日：1971-03-31

申请号：ZA704436

申请日：1970-06-29

Applicant: SNIA VISCOSA

Inventor： GIUFFRE L ,  SIOLI G

IPC: C07C251/46 ,  C07C67/00 ,  C07C239/00 ,  C07D201/10 ,  C07D223/10 ,  C07D

公开(公告)号：NO134151B

公开(公告)日：1976-05-18

申请号：NO296273

申请日：1973-07-20

Applicant: SNIA VISCOSA

Inventor： SIOLI G ,  GIUFFRE L ,  RIGHI F ,  MATERA G

IPC: C07C51/56

公开(公告)号：IT956941B

公开(公告)日：1973-10-10

申请号：IT2638572

申请日：1972-06-28

Applicant: SNIA VISCOSA

Inventor： SIOLI G ,  GIUFFRE L ,  MATTONE R

IPC: B01D3/00 ,  B01D9/02 ,  C07D201/16 ,  C07D

Abstract: 1430949 Lactams SNIA VISCOSA SOC NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA SpA 27 June 1973 [28 June 1972] 30468/73 Heading C2C A lactam, e.g. caprolactam, is removed from solution in an organic first solvent by adding to the solution a second solvent which is miscible with the first solvent but which is not a solvent for the lactam so that the lactam is displaced from solution in the first solvent. Exemplified as the first solvent is a phenol containing at least one alkyl substituent which contains 3 or more carbon atoms and has a solubility in water of less than 0À5 g. per 100 g. of water at 25‹ C. and in sulphuric acid solution containing 50 g. of sulphuric acid per 50 g. of water has a solubility of less than 0À2 g. per 100 g. of acid solution at 25‹ C, the substituent groups of the phenol not hindering the activity of the OH group of the phenol. The second solvent may be an aliphatic, aromatic or chlorinated hydrocarbon. A third solvent, e.g. water which is immiscible with both the first and second solvents but which is a solvent for the lactam may also be added to the solution so that the displaced lactam forms a solution in the third solvent.