http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-404938-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bba6a23b064f7c9c46db366b8de7659e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C33-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-10 |
| filingDate | 1994-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2000-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_da909b3a0f2413ea2ce95994a4351a61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c251deb12752036784238c44e77020f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad52b8bbf6920c64f2f382c6aad9dd99 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7a971e9aeb67fb09a6968e48ec619da |
| publicationDate | 2000-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-404938-B |
| titleOfInvention | Process for producing 2, 2-BIS(4-hydroxyphenyl) propane |
| abstract | There is disclosed a process for producing 2,2-bis(4-hydroxyphenyl)propane by the steps of condensing phenol and acetone in the presence of an acid catalyst, at a molar ratio of phenol/acetone in the range of 3 to 30 and a temperature in the range of 45 to 110 DEG C, to obtain a reaction mixture containing an adduct of 2,2-bis(4-hydroxyphenyl)propane and phenol, concentrating the reaction mixture in the condensation step installed in back of the reactor and in front of the crystallization step, so as to reduce the concentration of 2,2-bis(4-hydroxyphenyl)propane in the concentrated residual to 20 to 40% by weight, at conditions of a temperature in the range of 100 to 170 DEG C and a pressure in the range of 40 to 500 torr, crystallizing the adduct at a temperature in the range of 40 to 70 DEG C, after that conducting the separation, then separating phenol from this adduct, which process is characterized by bringing the crystallization mother liquor from which the adduct has been removed into contact with an acid catalyst comprising a cation-exchange resin of sulfonic acid type, to effect an isomerizing treatment at conditions of a temperature in the range of 45 to 110 DEG C and a liquid hourly space velocity (LHSV) in the range of 0.5 to 5 hr<-1>, by continuous reaction process with fixed bed, and recycling the obtained isomerization reaction product with a concentration of 2,2-bis(4-hydroxyphenyl)propane of lower than 25% by weight to the aforementioned concentration step. According to the above process, bisphenol A is efficiently recovered from the mother liquor and bisphenol A as the objective product is obtained in high yield and high purity. |
| priorityDate | 1993-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.