http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108084068-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-06 |
| filingDate | 2017-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108084068-B |
| titleOfInvention | Method for converting low-content bisphenol S into high-content bisphenol S |
| abstract | The invention relates to a method for converting low-content bisphenol S into high-content bisphenol S, which comprises the steps of adding low-content bisphenol S with the water content of 4-6 wt% into a flask, then adding mesitylene into the flask, heating up, refluxing and dehydrating after the addition is finished, and removing the water in the bisphenol S; after moisture is removed, cooling the flask, sequentially adding an alcohol solvent and a sulfonic acid catalyst into the flask, and continuously performing reflux reaction for 6-8 hours; after the reflux reaction is finished, sampling and analyzing, stopping the reaction when the content of the 4,4' -dihydroxy diphenyl sulfone reaches 94-95%, and decompressing and recovering the alcohol solvent; and finally, adding a mixed alcohol solvent of isopropanol and isoamylol into the 4,4 '-dihydroxy diphenyl sulfone with the content of 94-95% for recrystallization to obtain the high-content bisphenol S with the 4,4' -dihydroxy diphenyl sulfone content of 99-99.8%. The invention has the advantages that: the invention improves the utilization rate of products and reduces the production cost and the environmental protection cost at the same time. |
| priorityDate | 2017-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.