| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-567
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C65-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-89 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 |
| filingDate |
2004-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9c91e06b52d46f5e3aedfdfe0a2f01f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_007ee1e9c7fa21615164a5586e32d811 |
| publicationDate |
2005-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1599458-A1 |
| titleOfInvention |
Method for preparing oxydiphthalic anhydrides using bicarbonate as catalyst |
| abstract |
Oxydiphthalic anhydrides such as 4-oxydiphthalic anhydride are prepared by the reaction of a halophthalic anhydride with an alkali metal carbonate such as potassium carbonate in the presence of a catalyst system comprising an alkali metal bicarbonate such as potassium bicarbonate and a phase transfer catalyst, preferably a tetraarylphosphonium halide. |
| priorityDate |
2003-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |