http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20040004687-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26 |
| filingDate | 2002-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2004-01-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20040004687-A |
| titleOfInvention | Two stage oxidation process for the production of aromatic dicarboxylic acids |
| abstract | The present invention relates to a first method comprising a dialkyl benzene compound and acetic acid in which a catalyst component is dissolved, and a benzene dicarboxylic acid in which the dialkyl benzene compound is oxidized with molecular oxygen and contains a small amount of monocarboxylic acid by-products such as carboxybenzaldehyde and toluic acid. Disclosed is a process for preparing a benzenedicarboxylic acid, such as terephthalic acid, which is fed to a first reaction zone providing an oxidation zone product. The first oxidation zone product comprising a slurry of benzene dicarboxylic acid containing a small amount of monocarboxylic acid by-product is fed to a second oxidation reaction zone operating under more severe temperature and pressure conditions. The feed rate of the molecular oxygen-containing gas to the second oxidation zone is 3% or less of the feed rate of the molecular oxygen-containing gas to the first oxidation zone. The benzene dicarboxylic acid product obtained contains carboxybenzaldehyde and toluic acid in a concentration of up to 150 ppmw in total. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100673093-B1 |
| priorityDate | 2001-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.