http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1468987-A4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_623d02c6091d38f6b59470d9ab8ce72c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-22 |
| filingDate | 2003-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d826127ec747097cac526ad20bce8142 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d6e6cc940a995eb9b9d76689ae77a3d4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6eaa99438c4e820cfe816db53356b28f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6aadb4bcc3350e989d969219c813fdd8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba07e8f1371090aaabca2a39dc4d9123 |
| publicationDate | 2006-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1468987-A4 |
| titleOfInvention | PROCESS FOR PRODUCING 2,4'-DIHYDROXYDIPHENYL SULFONE |
| abstract | A process for producing 2,4'-dihydroxydiphenyl sulfone which comprises: subjecting a mixture which has been obtained by the dehydrating reaction of phenol with sulfuric acid or phenolsulfonic acid and contains 4,4'-dihydroxydiphenyl sulfone, 2,4'-dihydroxydiphenyl sulfone, phenolsulfonic acid, and phenol to crystallization to separate the 4,4'-dihydroxydiphenyl sulfone from the mixture and thereby obtain a mixture in which the content of 2,4'-dihydroxydiphenyl sulfone is not lower than that of 4,4'-dihydroxydiphenyl sulfone; regulating the mixture so as to have a solvent composition having a phenol/water ratio of from 10/90 to 90/10 by weight; crystallizing the 2,4'-dihydroxydiphenyl sulfone; and isolating the 2,4'-dihydroxydiphenyl sulfone by filtration. Also provided is a process for producing 2,4'-dihydroxydiphenyl sulfone in which the filtrate resulting from the filtration is utilized as a feed material for the subsequent dehydrating reaction. |
| priorityDate | 2002-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.