http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2003313160-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9d3e7acaa8f222171094c47408fbfc1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-22 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 |
| filingDate | 2002-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_24a779b4f9d959be86973c5c9533722e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70001ef7b2a78ee31737bb094d5778b3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2b44c63809e367437399d80e4743fdf1 |
| publicationDate | 2003-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2003313160-A |
| titleOfInvention | Process for producing dihydroxydiphenyl sulfone isomer mixture |
| abstract | PROBLEM TO BE SOLVED: To provide a method for producing a high-performance quality dihydroxydiphenylsulfone isomer mixture which does not cause the problem of background coloring (coloring) when used as a developer for thermal paper, and the dihydroxy. A mixture of diphenyl sulfone isomers is provided. SOLUTION: The organic solvent solution or the organic solvent suspension of the crude isomer mixture containing 2,4'-dihydroxydiphenylsulfone and 4,4'-dihydroxydiphenylsulfone is cooled and filtered. A method for producing a mixture of dihydroxydiphenylsulfone isomers, and a solution or suspension of an organic solvent of a crude isomer mixture containing 2,4′-dihydroxydiphenylsulfone and 4,4′-dihydroxydiphenylsulfone with a base After mixing the crude isomer mixture with the basic aqueous solution and extracting the crude isomer mixture into the basic aqueous solution, removing the organic solvent layer by a liquid separation operation, adding an acidic substance to the basic aqueous solution, and filtering the precipitated crystals. A process for producing a mixture of dihydroxydiphenylsulfone isomers, characterized in that: Emissions isomer mixture. |
| priorityDate | 2002-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.