http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4948921-A
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 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 |
| filingDate | 1989-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1990-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48fa2b137acf1bc5db9490ae307f9fa0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bca236b6a718f62c9c047ae9051d5de8 |
| publicationDate | 1990-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4948921-A |
| titleOfInvention | Process for the production and recovery of trimellitic acid |
| abstract | A process for the oxidation of pseudocumene to TMLA is disclosed which comprises catalytic oxidation of pseudocumene with air in the presence of acetic acid in an oxidation zone in the liquid phase wherein the weight ratio of acetic acid to pseudocumene is in the range of about 0.5-0:1.0 and the catalyst comprises one or more heavy metal oxidation catalysts comprising zirconium, cobalt, and manganese to provide about 0.1 to about 0.4 weight percent total metals based on pseudocumene and a source of bromine. The addition of the bromine component is controlled to provide a total of about 0.10 to about 0.30 weight percent total bromine based on pseudocumene. The total weight ratio of bromine ions to total metals ions is about 0.5 to about 2.0. The zirconium content is about 1 to about 5% and the manganese content is about 14 to about 60% each by weight of the total metals. The reaction temperature is about 300 DEG F. to about 420 DEG F. The crude trimellitic anhydride is hydrolyzed with water or a mixture of a low molecular weight carboxylic acid and water. Alternatively, a trimellitic anhydride/dimethylformamide adduct is prepared and this adduct is hydrolyzed with a mixture of a low molecular weight carboxylic acid and water. Trimellitic acid is useful in the manufacture of polyesters and polyamide-imides. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5929274-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6696604-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5961935-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100460400-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5250724-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6113866-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100431688-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6054610-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/BE-1006355-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5095141-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02057247-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02057247-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6013835-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5767311-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5145971-A |
| priorityDate | 1989-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 86.