GB1029201A - Process for the rearrangement of cyclic oximes - Google Patents
Process for the rearrangement of cyclic oximesInfo
- Publication number
- GB1029201A GB1029201A GB1395/63A GB139563A GB1029201A GB 1029201 A GB1029201 A GB 1029201A GB 1395/63 A GB1395/63 A GB 1395/63A GB 139563 A GB139563 A GB 139563A GB 1029201 A GB1029201 A GB 1029201A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxime
- exchanger
- ion
- solvent
- lactam
- 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
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/02—Preparation of lactams
- C07D201/04—Preparation of lactams from or via oximes by Beckmann rearrangement
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/16—Separation or purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D225/00—Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom
- C07D225/02—Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom not condensed with other rings
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
Abstract
Lactams are made by contracting a hot solution of a cyclic oxime, containing no more than 6 carbon atoms, in a non-aqueous organic acid that is a solvent for the oxime, with a sulphonic acid ion exchanger, whereby the oxime is converted to the lactam which is bound by the sulphonic groups on the ion-exchanger, separating the ion-exchanger from the solvent for the oxime and removing the lactam from the ionexchanger with an aqueous solvent at a temperature below 5 DEG C. Specified solvents for the oxime are anhydrous acetic acid and an anhydrous acetic acid/acetic anhydride mixture. Suitable temperatures to which the oxime solution is heated are in the range 107-120 DEG C. Examples relate to the preparation of caprolactam.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH41862A CH394212A (en) | 1962-01-13 | 1962-01-13 | Process for rearrangement of cyclic oximes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1029201A true GB1029201A (en) | 1966-05-11 |
Family
ID=4186573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1395/63A Expired GB1029201A (en) | 1962-01-13 | 1963-01-11 | Process for the rearrangement of cyclic oximes |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH394212A (en) |
GB (1) | GB1029201A (en) |
NL (1) | NL140238B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944542A (en) * | 1971-05-15 | 1976-03-16 | Stamicarbon, B.V. | Conversion of ketoximes into lactams in organic sulfoxide solvents |
CN1036583C (en) * | 1992-06-30 | 1997-12-03 | Dsm有限公司 | Process for the conversion of oximes into the corresponding amides |
CN100363351C (en) * | 2004-11-17 | 2008-01-23 | 中国石油化工股份有限公司 | Production of hexyl lactam |
-
1962
- 1962-01-13 CH CH41862A patent/CH394212A/en unknown
-
1963
- 1963-01-11 NL NL63287682A patent/NL140238B/en unknown
- 1963-01-11 GB GB1395/63A patent/GB1029201A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944542A (en) * | 1971-05-15 | 1976-03-16 | Stamicarbon, B.V. | Conversion of ketoximes into lactams in organic sulfoxide solvents |
CN1036583C (en) * | 1992-06-30 | 1997-12-03 | Dsm有限公司 | Process for the conversion of oximes into the corresponding amides |
CN100363351C (en) * | 2004-11-17 | 2008-01-23 | 中国石油化工股份有限公司 | Production of hexyl lactam |
Also Published As
Publication number | Publication date |
---|---|
CH394212A (en) | 1965-06-30 |
NL140238B (en) | 1973-11-15 |
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