http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1235421-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_572ab3dc169a753db545ebb270bf4e36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D303-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C61-15 |
| filingDate | 1984-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1988-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_14e3d9f5ca7c306e29d9889f484ec469 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c22158e516de3fc00ab29a616f8a1be8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7b405d95d003d501aa1f792336a3146 |
| publicationDate | 1988-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1235421-A |
| titleOfInvention | 4,4-dihalohexahydrophthalic anhydrides and 4- fluorotetrahydrophthalic anhydride, and processes for their preparation and utilization |
| abstract | ABSTRACT 4,4-Dihalohexahydrophthalic anhydrides of the formula: where Y is chlorine or fluorine, are prepared by the reaction of hydrogen fluoride with 4-chlorotetrahydro-phthalic anhydride; the dihalo- anhydrides can be de-hydrohalogenated by reaction with basic alumina to pre-pare a mixture of 4-fluorotetrahydrophthalic anhydride isomers of the formula: the 4-fluorotetrahydrophthalic anhydrides can then be dehydrogenated by reaction with a dehydrogenation cata-lyst to prepare 4-fluorophthalic anhydride; thus the anhydrides are useful as chemical intermediates for the synthesis of 4-fluorophthalic anhydride which in turn is useful in the preparation of aromatic ether and thio-ether anhydride curing agents, antioxidants and poly-etherimide polymers. |
| priorityDate | 1983-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 81.