http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H07188241-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fb2edb0f237a90d982f2dce09ad61976 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D493-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-76 |
| filingDate | 1993-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a3f731a6b00a1ef3d240382b67af5c05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_717bafa8960194abae5f48b09c696280 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_742904b99e105116d7f84b7ea27d64a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_38d6267f2f424ca8b8beb79abf1a62bd |
| publicationDate | 1995-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H07188241-A |
| titleOfInvention | Separation and recovery method of pyromellitic dianhydride |
| abstract | (57) [Summary] [Structure] In a method of separating pyromellitic dianhydride crystals obtained by introducing pyromellitic dianhydride contained in a catalytic gas phase oxidation product gas into a crystallization collector, This is a method for separating pyromellitic dianhydride, in which alcohol is allowed to act on the pyromellitic dianhydride crystals to dissolve the pyromellitic dianhydride, and the pyromellitic dianhydride is mainly discharged as a diester of pyromellitic dianhydride outside the crystallization collector. [Effect] According to the present invention, a diester of pyromellitic acid is mainly obtained by the action of alcohol, and if it is further esterified, a tetraalkyl ester of pyromellitic acid useful as a heat-resistant plasticizer for vinyl chloride is obtained. Etc. can be obtained more easily than before, and the diester of pyromellitic acid has applications in polyamide or polyimide resins, and it is possible to provide an inexpensive raw material. |
| priorityDate | 1993-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.