http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20220050988-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C317-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-02 |
| filingDate | 2020-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad8cf8e26e61c4ca25cc063d54da029a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab19bb786f60b62e255793674fb8b3b5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e15b9e3ff376ecc7c230773ad9cdc558 |
| publicationDate | 2022-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20220050988-A |
| titleOfInvention | Method for preparing 4,4'-dichlorodiphenyl sulfone |
| abstract | The present invention relates to a crude reaction product comprising 4,4'-dichlorodiphenyl sulfone by reacting a solution comprising 4,4'-dichlorodiphenyl sulfoxide and at least one linear C 6 -C 10 carboxylic acid as a solvent with an oxidizing agent It relates to a process for preparing 4,4'-dichlorodiphenyl sulfone, comprising the step of obtaining: (a) a first step, at a temperature in the range of 80 to 105° C. over a period of 1.5 to 5 hours, 0.9 to 1.05 moles of an oxidizing agent per mole of 4,4′-dichlorodiphenyl sulfoxide are uniformly added to the solution to obtain a reaction mixture to do; (b) stirring the reaction mixture at the temperature of the first step for 5 to 30 minutes without adding an oxidizing agent after completion of the first step; (c) adding 0.05 to 0.2 moles of an oxidizing agent per mole of 4,4'-dichlorodiphenyl sulfoxide to the reaction mixture at a temperature in the range of 80 to 105° C. over a period of less than 40 minutes in a second step; (d) stirring the reaction mixture at the temperature of the second step for 10 to 30 minutes without adding an oxidizing agent after completion of the second step; (e) heating the reaction mixture to a temperature in the range of 95 to 110° C. and maintaining the temperature for 10 to 90 minutes to obtain a crude reaction product comprising 4,4′-dichlorodiphenyl sulfone. |
| priorityDate | 2019-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.