| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cff62ee19588f053fe1f229df4e6c756 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-331
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-333
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate |
1992-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_27bd69a7d6fa9bb1a7abc778dbdbfbc8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a37eb02b6f8feae917069cc782f5e3f7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_14542075f1a83916f56c1e228ead89df |
| publicationDate |
1993-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H05294891-A |
| titleOfInvention |
Method for producing biphenyldicarboxylic acid |
| abstract |
(57) [Summary] [Objective] The crude biphenyldicarboxylic acid containing impurities and coloring components obtained by the oxidation reaction of dialkylbiphenyl and the like can be easily purified without using a large amount of alkali, acid and water. Biphenyldicarboxylic acid having high purity and good hue is efficiently produced with high recovery rate. [Structure] Crude biphenyldicarboxylic acid obtained by oxidizing disubstituted biphenyls is dissolved in a mixed solvent of amines and alcohols for crystallization, and the separated crystallization product is heated to a temperature not lower than the boiling point of alkylamines. Purity 99% by heating By the above, biphenyldicarboxylic acid having a good hue is obtained. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-5262710-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007116906-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4654515-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002128729-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8168819-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6452047-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101375041-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1055660-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002193870-A |
| priorityDate |
1992-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |