| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_51b8f4040f2c90da075bcad83aaf78d7 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-48 |
| filingDate |
1981-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1983-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_966a050b92df28e8c3590c14be853fbe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84488454026cfb1a5ea3a4b9c25fef75 |
| publicationDate |
1983-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4380662-A |
| titleOfInvention |
Process for the purification of terephthalic acid |
| abstract |
Disclosed is a process for the purification of a crude terephthalic acid product contaminated with up to 10% by weight of partially oxidized impurities including p-toluic acid and 4-carboxybenzaldehyde, comprising the steps of dissolving the crude product in water by heating up to a temperature at least about 5 DEG C. higher than necessary for having the resulting solution saturated with terephthalic acid; cooling the resulting solution down to a temperature not lower than about 185 DEG C. to precipitate purified crystals; recovering the purified crystals by solid-liquid separation at a temperature not lower than that used for the precipitation of the purified crystals; and washing the recovered crystals by contacting with water at a temperature which is at least as high as the temperature of the recovery step. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5767311-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7214760-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8754254-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6013835-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7226986-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012012048-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8884054-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8884055-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6113866-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7193109-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012012048-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5643468-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005154179-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1030829-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8933266-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9640612-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8933265-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1030829-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005159617-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9045407-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005228164-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004073059-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7276625-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6054610-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2564409-C2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7601795-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102958897-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5961935-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8835678-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102958897-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7339072-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5929274-A |
| priorityDate |
1981-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |