| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c5d35cbcd18261ca6afc76a9f64ae2a1 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-06 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-22 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-06 |
| filingDate |
1991-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8dccc2b31d0a1a7ff658cc384e46b20a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3207725a3d5f4bd024bc4d9d28e8cd29 |
| publicationDate |
1992-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9214698-A1 |
| titleOfInvention |
Process for purifying impure mixtures containing 4,4'-dihydroxydiphenyl sulfone |
| abstract |
Described herein is a purification process to make high isomeric purity, essentially colorless 4,4'-dihydroxydiphenyl sulfone from an impure isomeric mixture comprising 4,4'-dihydroxydiphenyl sulfone, 2,4'-dihydroxydiphenyl sulfone, and optionally triphenol disulfone, which combines one or more recrystallizations from water or water with a small amount of added base and decolorization with a carbonaceous adsorbent. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1498412-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1498412-A4 |
| priorityDate |
1991-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |