GB915397A - Process for the recovery of capro-lactam monomer - Google Patents
Process for the recovery of capro-lactam monomerInfo
- Publication number
- GB915397A GB915397A GB3916559A GB3916559A GB915397A GB 915397 A GB915397 A GB 915397A GB 3916559 A GB3916559 A GB 3916559A GB 3916559 A GB3916559 A GB 3916559A GB 915397 A GB915397 A GB 915397A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caprolactam
- inert gas
- monomer
- liquid
- capro
- 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
- C08G69/46—Post-polymerisation treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
Abstract
Polycaprolactam containing caprolactam monomer is purified by evaporating the monomer from the polymer in the presence of inert gas and removing the caprolactam vapour from the inert gas stream by contact with liquid caprolactam. The liquid caprolactam is preferably at about 75 DEG C. The inert gas may be recycled, if necessary after drying at least a portion thereof. A part may be replaced by fresh inert gas before recycling. The condensed caprolactam may be used directly for polymerization. Specifications 676,585 and 798,659 are referred to.ALSO:Caprolactam monomer is recovered from polymeric caprolactam containing said monomer by evaporating the monomer from the polymer in the presence of inert gas and removing the caprolactam vapour from the inert gas stream by contact with liquid caprolactam. The liquid lactam is preferably kept at about 75 DEG C. The inert gas may be recycled, if necessary after drying at least a portion thereof. A part of the inert gas may be replaced by fresh inert gas before recycling. The condensed caprolactam may be used directly for polymerization. Specifications 676,585 and 798,659 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH6643258A CH373388A (en) | 1958-11-20 | 1958-11-20 | Process for the production of e-caprolactam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB915397A true GB915397A (en) | 1963-01-09 |
Family
ID=4527163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3916559A Expired GB915397A (en) | 1958-11-20 | 1959-11-18 | Process for the recovery of capro-lactam monomer |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE584167A (en) |
| CH (1) | CH373388A (en) |
| GB (1) | GB915397A (en) |
| SE (1) | SE303748B (en) |
-
1958
- 1958-11-20 CH CH6643258A patent/CH373388A/en unknown
-
1959
- 1959-10-30 BE BE584167A patent/BE584167A/en unknown
- 1959-11-10 SE SE1053559A patent/SE303748B/xx unknown
- 1959-11-18 GB GB3916559A patent/GB915397A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH373388A (en) | 1963-11-30 |
| BE584167A (en) | 1960-02-15 |
| SE303748B (en) | 1968-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1336831A (en) | Recovery of n-alkylated lactams and n-cycloalkylated lactams | |
| US3047565A (en) | Process for extraction of monomeric caprolactam from its polymer | |
| GB818461A (en) | Polymer recovery process | |
| GB897271A (en) | Process and apparatus for flash concentration of polyolefin solutions | |
| KR860000829B1 (en) | Recovery of caprolactam from nylon 6 oligomers | |
| GB1003565A (en) | Process for recovering polymer from dilute polymer solutions | |
| GB1023570A (en) | Improvements in or relating to a nitrocellulose product and process of manufacture | |
| GB996322A (en) | Simultaneous recovery of pure ammonium sulphate and pure lactams from rearrangement mixtures of alicyclic ketoximes | |
| GB915397A (en) | Process for the recovery of capro-lactam monomer | |
| GB1530070A (en) | Drying of water-wet solid materials | |
| GB1275574A (en) | Regeneration of glycol drying agents employed in butyl rubber manufacture | |
| GB986924A (en) | Process for the recovery of tertiary olefins | |
| GB851899A (en) | Improved process for resolution of gaseous mixtures | |
| GB952662A (en) | A process for the polymerisation of alkoxypropenes | |
| GB913153A (en) | Process for purifying high molecular weight solid polyolefins | |
| GB1070082A (en) | Purification of 2,6-xylenol | |
| GB804686A (en) | Improvements relating to the purification of lactams | |
| US3507856A (en) | Purification of caprolactam obtained by nitrosation of cyclohexyl compounds | |
| GB876494A (en) | Process for separating acetylene from gaseous mixtures containing it | |
| GB1401573A (en) | Process for regenerating exhausted active carbon | |
| GB1048233A (en) | Purified laurolactam | |
| KR840005821A (en) | Purification Method of Propylene Polymer | |
| GB1263505A (en) | Process for the production of substantially impurity-free high percent hydrofluoric acid | |
| GB1029201A (en) | Process for the rearrangement of cyclic oximes | |
| GB1222095A (en) | Improvements in or relating to the production of a cyanuric chloride solution |