http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4382896-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6223bea7bd553fbad56cc0c78d55bc61 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-50 |
| filingDate | 1982-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1983-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_17758962cbf9e9d66c0e4108e0653109 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f5c637b73a7d0c3596fbdbd2a8459a15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_19d37dd36dafa5ea6f81a80f25eb2bc3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eb0409d5d19c2baa340c11b2be6fe5a5 |
| publicationDate | 1983-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4382896-A |
| titleOfInvention | Process for producing 4,4'-diphenyldisulfonic acid and its monopotassium salt |
| abstract | A process for producing 4,4'-diphenyldisulfonic acid is disclosed, which comprises the steps of adding a sulfonating agent to molten diphenyl at a temperature within a range of 130 DEG to 145 DEG C., and when crystallization commences of 4,4'-diphenyldisulfonic acid within such temperature range, cooling the reaction mixture to a temperature within a range of 115 DEG to 127 DEG C., and letting the disulfonation reaction complete while the reaction mixture is maintained within the cooled temperature range. A process for producing monopotassium 4,4'-diphenyldisulfonate is also disclosed, in which steps are taken of adding a sulfonating agent to diphenyl, then controlling the sulfuric acid concentration to 45 to 55%, and while the reaction mixture is heated to at least 140 DEG C., adding at least a stoichiometric amount of a potassium salt of an inorganic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114933553-A |
| priorityDate | 1981-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.