GB1286427A - Process of purifying lactams - Google Patents
Process of purifying lactamsInfo
- Publication number
- GB1286427A GB1286427A GB2401871A GB2401871A GB1286427A GB 1286427 A GB1286427 A GB 1286427A GB 2401871 A GB2401871 A GB 2401871A GB 2401871 A GB2401871 A GB 2401871A GB 1286427 A GB1286427 A GB 1286427A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxime
- sulphur dioxide
- lactam
- distillation
- purifying lactams
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/16—Separation or purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1286427 Purifying lactams FARBENFABRIKEN BAYER AG 19 April 1971 [26 March 1970] 24018/71 Heading C2C In a process for the removal of at least one oxime from at least one oxime-containing lactam obtained by the catalytic rearrangement of an oxime in the gaseous phase, sulphur dioxide is introduced at a temperature of from 70‹ to 170‹ C. into the lactam until the concentration of the sulphur dioxide is at least 1 mol. per mol. of the oxime; and on completion of the reaction, the excess sulphur dioxide is removed and the lactam is recovered by distillation. Sodium hydroxide is preferably added before the distillation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702014761 DE2014761C3 (en) | 1970-03-26 | 1970-03-26 | Process for removing oximes from lactams |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1286427A true GB1286427A (en) | 1972-08-23 |
Family
ID=5766479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2401871A Expired GB1286427A (en) | 1970-03-26 | 1971-04-19 | Process of purifying lactams |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE764894A (en) |
CH (1) | CH549021A (en) |
DE (1) | DE2014761C3 (en) |
FR (1) | FR2087869A5 (en) |
GB (1) | GB1286427A (en) |
NL (1) | NL172150C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0464943A1 (en) * | 1990-07-06 | 1992-01-08 | Dsm N.V. | Process for treating amides |
NL1003564C2 (en) * | 1996-07-11 | 1998-01-15 | Dsm Nv | Method for separating a ketoxime or aldoxime from an amide. |
-
1970
- 1970-03-26 DE DE19702014761 patent/DE2014761C3/en not_active Expired
-
1971
- 1971-03-24 CH CH426771A patent/CH549021A/en not_active IP Right Cessation
- 1971-03-25 FR FR7110730A patent/FR2087869A5/fr not_active Expired
- 1971-03-25 NL NL7104047A patent/NL172150C/en not_active IP Right Cessation
- 1971-03-26 BE BE764894A patent/BE764894A/en not_active IP Right Cessation
- 1971-04-19 GB GB2401871A patent/GB1286427A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0464943A1 (en) * | 1990-07-06 | 1992-01-08 | Dsm N.V. | Process for treating amides |
US5227028A (en) * | 1990-07-06 | 1993-07-13 | Dsm N.V. | Process for treating amides |
NL1003564C2 (en) * | 1996-07-11 | 1998-01-15 | Dsm Nv | Method for separating a ketoxime or aldoxime from an amide. |
WO1998002416A1 (en) * | 1996-07-11 | 1998-01-22 | Dsm N.V. | Process for the separation of a ketoxime or aldoxime from an amide |
US6706153B2 (en) | 1996-07-11 | 2004-03-16 | Dsm N.V. | Process for the separation of a ketoxime or aldoxime from an amide |
Also Published As
Publication number | Publication date |
---|---|
DE2014761B2 (en) | 1981-01-15 |
DE2014761A1 (en) | 1971-10-21 |
NL172150C (en) | 1983-07-18 |
DE2014761C3 (en) | 1982-01-21 |
BE764894A (en) | 1971-08-16 |
FR2087869A5 (en) | 1971-12-31 |
NL7104047A (en) | 1971-09-28 |
CH549021A (en) | 1974-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |