公开(公告)号：ZA734342B

公开(公告)日：1974-05-29

申请号：ZA734342

申请日：1973-06-26

Applicant: SNIA VISCOSA

Inventor： MATTONE R ,  SIOLI G ,  GIUFFRE L

IPC: C07D201/16 ,  B01D11/04 ,  C07D

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：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：BR7304800D0

公开(公告)日：1974-09-05

申请号：BR480073

申请日：1973-06-28

Applicant: SNIA VISCOSA

Inventor： SIOLI G ,  GIUFRE L ,  MALTONE R

IPC: B01D11/04 ,  C07D201/16 ,  C07D41/06

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：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.

公开(公告)号：IT956940B

公开(公告)日：1973-10-10

申请号：IT2638472

申请日：1972-06-28

Applicant: SNIA VISCOSA

Inventor： SIOLI G ,  GIUFFRE L ,  MATTONE R

IPC: B01D11/04 ,  C07D201/16 ,  C07D

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：ZA711118B

公开(公告)日：1971-11-24

申请号：ZA711118

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

Abstract: A method is disclosed for the preparation of alicyclic ketenes, useful as intermediates in the preparation of lactams. The instant method consists in a heat treatment of an alicyclic acid, or its anhydride, in a matallic reactor exempt from nickel, at high temperatures but under subatmospherical pressures. A catalyst of the type XP(OR)3 wherein X is selected from the group consisting of oxygen, sulphur and selenium and R is an alkyl radical is preferred for accelerating the reactions. The temperatures are in the range from 550 DEG to 750 DEG C and the preferred pressure is under 100 millimeters of mercury. High yields and conversion rates are obtained and the purity of the end product is more than satisfactory. The method can be applied to the preparation of a number of alicyclic ketenes.

公开(公告)号：ZA7004436B

公开(公告)日：1971-03-31

申请号：ZA7004436

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

CPC classification number: C07D201/10

公开(公告)号：YU173673A

公开(公告)日：1982-02-28

申请号：YU173673

申请日：1973-06-27

Applicant: SNIA VISCOSA

Inventor： MATTONE R ,  SIOLI G ,  GIUFFRE L

IPC: B01D3/00 ,  B01D9/02 ,  C07D201/16 ,  C07D207/00

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.

公开(公告)号：IN140469B

公开(公告)日：1976-11-13

申请号：IN178CA1973

申请日：1973-01-25

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 ,  C07D29/22 ,  C07D41/06

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：NO134151C

公开(公告)日：1976-08-25

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