| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bc442f269b1a5c92ef9f0be18055c7ac |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J8-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-15 |
| filingDate |
1998-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f5bfb34150a0b43f863a22bc19a8246d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_68ca364ef1f0cca31aec08a86e4532bb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_976827b4a3a4008f498a99b47af7c776
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b2e0968ccdf839be57d7db4af8f2968e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_abbdfc1c0fef9979a9d529c9b7cdc4c8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab9d766c0e52c1301f48c22b22fefcb6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_17494aef53bc3adfd3e80d0144ef3006 |
| publicationDate |
2003-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
RU-2205173-C2 |
| titleOfInvention |
Bis(4-hydroxyaryl)alkanes' production process |
| abstract |
FIELD: industrial organic synthesis. SUBSTANCE: bis(4-hydroxyaryl)alkanes are prepared by condensation of aromatic hydroxy compounds with ketones, in particular production of bisphenol A from phenol and acetone. Process is carried out in gas-liquid mode in countercurrent column-type rectification reactor providing continuous removal of forming water. Process is preferably catalyzed by cation-exchange resin in H form. Temperature and content of ketones and water in liquid reaction mixture are controlled by varying gas phase composition. In this case, water is transferred into gas phase and ketone from liquid phase into gas phase according to thermodynamic equilibrium. Temperature in reactor is superior to crystallization temperature of reaction mixture. EFFECT: increased selectivity of process and yield of desired product. 13 cl, 10 ex |
| priorityDate |
1997-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |