http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1599439-A1
Outgoing Links
Predicate | Object |
---|---|
assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C65-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-567 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-567 |
filingDate | 2004-02-17-04:00^^<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-1599439-A1 |
titleOfInvention | Method for preparing oxydiphthalic anhydrides using guanidinium salt 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. The reaction proceeds in the presence of a hexaalkylguanidinium halide or alpha,omega-bis(pentaalkylguanidinium)alkane halide as a phase transfer catalyst. |
priorityDate | 2003-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 109.