http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9852900-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c5d35cbcd18261ca6afc76a9f64ae2a1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate | 1998-03-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_39cdf9d57ec08e7e29cd6bfd4b4de8cd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e465e856558955cb955babba04e58d6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1037c2db2c8671113021ad9b828cca39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b2f8adf7e7bf6129b15004804cc1abef |
| publicationDate | 1998-11-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9852900-A1 |
| titleOfInvention | Process for preparing purified aromatic polycarboxylic acids |
| abstract | Economical processes are disclosed for preparing relatively pure polycarboxylic acid from typical crude products of liquid phase oxidation, which do not involve intermediate steps of ester formation or require any alkanol containing solvent, for purification of 'crude' polycarboxylic acid containing impurities which include one or more monofunctional aromatic compounds, trifunctional aromatic compounds, and/or color causing organic compounds formed by oxidation of a corresponding substituted aromatic compound in a liquid phase, e.g. 2,6-naphthalene dicarboxylic acid by liquid phase oxidation of 2,6-dimethyl naphthalene. The invention provides integrate processes which comprise reacting crude oxidation product with a polyalkyl amine amine, e.g. trialkylamine, forming an aqueous solution of the salts thus obtained, separating deleterious compounds from the solution, and recovering the polyalkyl amine and a relatively pure polycarboxylic acid product. |
| priorityDate | 1997-05-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 145.