http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1960558-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2a4dd47d8aa4f50fbb7cb8512dca5bcd |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-275 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-275 |
| filingDate | 1969-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2315606f95a86e25f5cf7212b74869ee http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2489ef7ad169a4294fdf84f624fcbd1b |
| publicationDate | 1971-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-1960558-A1 |
| titleOfInvention | Process for the preparation of aromatic polycarboxylic acids, in particular terephthalic acid |
| abstract | P-xylene and/or p-toluic acid is oxidised by air or O2 in 10-50 moles. pref. 25 moles, aliphatic carboxylic acid e.g. acetic acid, and an anhydride e.g. acetic anhydride, in the presence of Co(0.0003-0.02 pref. 0.003 mole per mole solvent) and Br at 90-130 degrees C pref. 120 degrees C followed by treatment with 0.5-5% pref. 1-3% HNO3 at 150-250 degrees C pref. 180-190 degrees C. Similarly other subst benzenes give polycarboxylic acids. Low Co and HNO3 concs give very pure product, suitable for preparing synthetic fibres. |
| priorityDate | 1969-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 58.