GB1121109A - Improvements in or relating to preparation of epsilon-caprolactams - Google Patents
Improvements in or relating to preparation of epsilon-caprolactamsInfo
- Publication number
- GB1121109A GB1121109A GB3738865A GB3738865A GB1121109A GB 1121109 A GB1121109 A GB 1121109A GB 3738865 A GB3738865 A GB 3738865A GB 3738865 A GB3738865 A GB 3738865A GB 1121109 A GB1121109 A GB 1121109A
- Authority
- GB
- United Kingdom
- Prior art keywords
- epsilon
- derivative
- hydroxy
- alkaline
- acid
- 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
- C07D201/08—Preparation of lactams from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones or nitriles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyamides (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Epsilon-caprolam and its derivatives are prepared by reacting an epsilon-hydroxy-caproic acid derivative in aqueous solution with ammonia or a primary amine in an amount from 1 to 10 moles per mol. of monomeric derivative or per ester equivalent of polyester taking into account the nitrogen contained in said derivative at a temperature from 250 DEG to 450 DEG C. under the autogenous pressure of the mixture in the absence of a catalyst and in the presence of a neutral salt soluble in water, and extracting the resultant e -caprolactam with a solvent. Epsilon-hydroxy-caproic acid derivatives are e -caprolactones, alkyl e -hydroxy caproates, e -acetoxycaproic acids, ammonium salts of e -hydroxycaprioc acid or e -hydroxycaproamides or capronitriles or polyesters of e -hydroxycaproic acid with molecular weights between 400 and 4000. The starting material is preferably a solution containing 5 to 25% by weight of the acid derivative. The neutral salt may be an alkali metal or alkaline-earth metal salt of inorganic or organic acids having anions stable under the reaction conditions, e.g. sodium and potassium chlorides, bromides, fluorides, sulphates, orthophosphates, carbonates and acetates; ammonium chloride, bromide, fluoride, sulphate and orthophosphate; and lithium, calcium and barium chlorides, bromides and acetates. Mixtures of these may be used. The neutral salt may also be the alkali metal or alkaline-earth metal salt of e -hydroxycaproic acid prepared in situ by the addition of an alkali metal or alkaline-earth metal compound, e.g. caustic soda or potash. In the case of e.g. a hydroxycaproamide or a capronitrile separate addition of ammonium or primary amine may not be necessary.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR987003A FR1419684A (en) | 1964-09-03 | 1964-09-03 | Advanced process for manufacturing epsilon-caprolactams |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1121109A true GB1121109A (en) | 1968-07-24 |
Family
ID=8837703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3738865A Expired GB1121109A (en) | 1964-09-03 | 1965-09-01 | Improvements in or relating to preparation of epsilon-caprolactams |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1620300C3 (en) |
FR (1) | FR1419684A (en) |
GB (1) | GB1121109A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996016936A1 (en) * | 1994-11-25 | 1996-06-06 | Basf Aktiengesellschaft | Method of producing caprolactam |
US6191274B1 (en) | 1996-02-17 | 2001-02-20 | Dsm N.V. | Recovery of ε-caprolactam |
WO2001083441A1 (en) * | 2000-05-03 | 2001-11-08 | Basf Aktiengesellschaft | Method for producing cyclic lactams |
CN114605307A (en) * | 2022-03-10 | 2022-06-10 | 浙江新和成股份有限公司 | Amination reaction and catalyst therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0826665A1 (en) * | 1996-09-02 | 1998-03-04 | Dsm N.V. | Recovery of epsilon-caprolactam from aqueous mixtures |
-
1964
- 1964-09-03 FR FR987003A patent/FR1419684A/en not_active Expired
-
1965
- 1965-09-01 GB GB3738865A patent/GB1121109A/en not_active Expired
- 1965-09-02 DE DE19651620300 patent/DE1620300C3/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996016936A1 (en) * | 1994-11-25 | 1996-06-06 | Basf Aktiengesellschaft | Method of producing caprolactam |
CN1070182C (en) * | 1994-11-25 | 2001-08-29 | 巴斯福股份公司 | Method of producing caprolactam |
US6191274B1 (en) | 1996-02-17 | 2001-02-20 | Dsm N.V. | Recovery of ε-caprolactam |
WO2001083441A1 (en) * | 2000-05-03 | 2001-11-08 | Basf Aktiengesellschaft | Method for producing cyclic lactams |
US6683178B2 (en) | 2000-05-03 | 2004-01-27 | Basf Aktiengesellschaft | Preparation of cyclic lactams |
CN114605307A (en) * | 2022-03-10 | 2022-06-10 | 浙江新和成股份有限公司 | Amination reaction and catalyst therefor |
Also Published As
Publication number | Publication date |
---|---|
FR1419684A (en) | 1965-12-03 |
DE1620300B2 (en) | 1973-07-05 |
DE1620300C3 (en) | 1974-02-28 |
DE1620300A1 (en) | 1972-03-30 |
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