GB885355A - Improvements in and relating to the production of epsilon-caprolactam - Google Patents
Improvements in and relating to the production of epsilon-caprolactamInfo
- Publication number
- GB885355A GB885355A GB19733/60A GB1973360A GB885355A GB 885355 A GB885355 A GB 885355A GB 19733/60 A GB19733/60 A GB 19733/60A GB 1973360 A GB1973360 A GB 1973360A GB 885355 A GB885355 A GB 885355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caprolactam
- epsilon
- relating
- production
- hydroxycaproamide
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
- C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
- C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D223/08—Oxygen atoms
- C07D223/10—Oxygen atoms attached in position 2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
- Polyamides (AREA)
Abstract
S -caprolactams are prepared by heating a 6-hydroxycaproamide of general formula HO-(CR2)5.CONHR, wherein R represents hydrogen or alkyl groups having up to 8 carbon atoms, in water at between 300 DEG C. and 475 DEG C., at superatmospheric pressure. The process may be continuous and the products are removed by conventional methods, e.g. extraction with chloroform. Compounds in which the total carbon atoms in the alkyl groups does not exceed 12 are preferred and such compounds are listed. Examples describe the use of 6-hydroxycaproamide, N-methyl, 3-methyl, and 3,5-dimethyl-6 hydroxycaproamides, to prepare the corresponding S -caprolactams.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US885355XA | 1959-06-08 | 1959-06-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB885355A true GB885355A (en) | 1961-12-28 |
Family
ID=22211930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19733/60A Expired GB885355A (en) | 1959-06-08 | 1960-06-03 | Improvements in and relating to the production of epsilon-caprolactam |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB885355A (en) |
-
1960
- 1960-06-03 GB GB19733/60A patent/GB885355A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1017443A (en) | Improved process for manufacture of pigment compositions of the quinacridone series | |
GB1048112A (en) | Process for the hydrodealkylation of alkyl aromatic compounds | |
GB920375A (en) | Process for the production of substantially stress-free moulded bodies | |
GB928812A (en) | Process for the production of cyclododecatri-1,5,9-enes | |
GB885355A (en) | Improvements in and relating to the production of epsilon-caprolactam | |
GB858254A (en) | Improvements in the production of expanded polyamides | |
ES420375A1 (en) | Process for the preparation of dibenzothiazolyl disulphide | |
GB1003719A (en) | Improvements in the manufacture of diphenyl from benzene | |
GB998523A (en) | A process for the production of 6-chloro-3-keto-í¸4,6-steroids | |
GB947606A (en) | N-substituted piperazines | |
GB848859A (en) | Process for the production of shaped parts of polyethylene | |
FR1361784A (en) | Process for the production of aqueous dispersions of hardenable plastics with good film-forming power | |
BE587832A (en) | Process for the production of carbon electrodes. | |
CA618244A (en) | Process for the production of co-polyamides with improved physical properties | |
BE593650A (en) | Process for the production of carbon tetrachloride. | |
GB877403A (en) | Improvements in or relating to the production of organic nitrogen compounds | |
GB1037380A (en) | Process for the production of basic esters of pyridine-carboxylic acids | |
GB742450A (en) | Improvements in or relating to piperazine derivatives and process of preparing the same | |
GB883940A (en) | Improvements in and relating to the preparation of substituted di-p-xylylenes | |
GB934643A (en) | Improvements in or relating to the preparation of tetracyanoethylene | |
GB900112A (en) | Process for the manufacture of halohydrocarbons | |
GB1056429A (en) | Improvements in or relating to new derivatives of lysergic acid | |
GB973927A (en) | Thiazolosteroids and production thereof | |
GB927698A (en) | Pharmaceutically useful sulphonylamido derivatives and process of preparing them | |
GB940779A (en) | Process for the manufacture of quinacridone dyestuffs |