http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4429107-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-46 |
| filingDate | 1982-08-24^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1984-01-31^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78071864d76702a1cb90a02cedf1994f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_283476f7fc8906a0c590e382ad2240d7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_33ac523f02343be8605ed28efa8d4371 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50abe0c25d26f6f1426ce17929f02557 |
| publicationDate | 1984-01-31^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4429107-A |
| titleOfInvention | Continuous preparation of polycaprolactam wherein constant composition is maintained |
| abstract | An improved process for the continuous preparation of polycaprolactam, in which ε-caprolactam is partially polymerized, with the addition of a water-containing agent and acetic acid or propionic acid as a chain regulator, at a nylon-forming temperature, in a mechanically mixed zone in a vertical tubular reactor through which the reaction mixture flows downwards, and is then polymerized further, in additional heat exchange zones, until the desired degree of polymerization is reached, and polycaprolactam is then discharged as a melt, wherein a gaseous mixture of caprolactam, water and acetic acid or propionic acid is removed at the top of the tubular reactor and is fed to the middle of a column, water is removed at the top of the column, the bottom of the column is maintained at from 125° to 145° C., and the mixture obtained at the bottom of the column, and comprising caprolactam, acetic acid or propionic acid and a small amount of water, is recycled to the top of the tubular reactor. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20160018798-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5218080-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5077381-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4746724-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9957355-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016159983-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5169582-A |
| priorityDate | 1981-09-02^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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