| Predicate |
Object |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-39
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-39
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 |
| filingDate |
1990-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c2dbdd0b2a3372151bfee070fa7721c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e50d35838d0c313b1cfe9bc07250da34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e86387b85374c8bce8e1ce1dbc7f3dc0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a8d20438de3353334c2aabf1c9d981d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8567b11a225eb57c3244c6b1b9eba06b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_55575ba6c31a5415ac8ed2c22c3abda4 |
| publicationDate |
1999-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
SK-280211-B6 |
| titleOfInvention |
METHOD OF PRODUCTION OF URC DIMETHYLTEREFTALATE INTERMEDIATE |
| abstract |
The DMT intermediate product is manufactured by joint oxidation of a mixture containing predominantly para-xylol (p-X) and para-toluene acid methyl ester (p-TE) in a liquid phase with a gas containing oxygen. The acids produced are esterified with methanol, and the esterification products are separated into a fraction rich in p-TE, a fraction containing more than 99 weight percent of DMT and its isomers and a residue fraction with a high boiling point, and the p-TE fraction is recycled to the oxidation. The residue fraction has a DMT content of 15 to 70 weight percent and the DMT fraction is purified by simple solvent recrystallisation in methanol to yield the DMT intermediate product in which the methyl hydroxy benzoate and methyl terephthalate together amount to less than 200 ppm. |
| priorityDate |
1989-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |