http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2459220-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_696ca0ae93d5cf5a686273601361781f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate | 1979-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1981-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2459220-A1 |
| titleOfInvention | PROCESS FOR THE PURIFICATION OF TEREPHTHALIC ACID |
| abstract | THE INVENTION RELATES TO A PROCESS FOR PURIFYING TEREPHTHALIC ACID. THE CRUDE TEREPHTHALIC ACID OBTAINED BY OXIDATION OF P-TOLUALDEHYDE IN THE LIQUID PHASE IS PURIFIED WITH MOLECULAR OXYGEN IN THE PRESENCE OF A BROMINE COMPOUND AS A CATALYST, USING WATER AS A SOLVENT, BY DISSOLUTION OF CRUDE ACID IN WATER, HYDROGENATION OF THE AQUEOUS SOLUTION WITH MOLECULAR HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST AND RECRISTALLIZATION OF THE TEREPHTHALIC ACID COMING FROM THE AQUEOUS HYDROGENATED SOLUTION, AND ADDED, BEFORE HYDROGENATION, ALKALINE MATERIAL WITH TEREPHTHALIC ACID SOLUTION TO PURIFY. PURIFIED TEREPHTHALIC ACID HAS A VERY LOW CONTENT OF 4-CARBOXYBENZALDEHYDE AND THE ACTIVITY OF THE HYDROGENATION CATALYST IS NOT REDUCED BY ADDITION OF THE ALKALINE MATERIAL. |
| priorityDate | 1979-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.