http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02221267-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b09f893b262cefd50c5e76c4b85d1c0a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-90 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D305-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-89 |
| filingDate | 1989-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37a5634f332eb85fe59db4c3037ba709 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e0446519658730a202f110f741332dd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3709a1de4206b70684ad9e7cd1508ad0 |
| publicationDate | 1990-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02221267-A |
| titleOfInvention | Method for suppressing formation of polymer at time of ketene dimerization |
| abstract | PURPOSE: To suppress the formation of a polymer at the time of dimerization by using a specific amt. of sulfur dioxide as an inhibitor to add the same to a reaction medium of keten obtained by the catalytic decomposition of acetic acid or crude ketene gas to perform dimerization reaction of a batchwise system or the like. n CONSTITUTION: 10-6,000 ppm, pref., 100-2,000 ppm of sulfur dioxide is added on the suction side of a fluid circulating type vacuum pump used in the compression of crude ketene gas obtained by the catalytic decomposition of acetic acid as an inhibitor (additive) to cleave a nonionic polymn. chain and the development of a polymn. initiating group is deactivated to perform batchwise or continuous dimerization reaction to suppress the formation of a polymer at a time of dimerization. The above method contains no metal or halogen and does not use protonic acid and a solvent to be industrially advantageous. n COPYRIGHT: (C)1990,JPO |
| priorityDate | 1989-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.