| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fa12583b23057a64d1fe6b3301e2724b |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-12 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate |
1999-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c0405d6e2467bda8404865b29530d10d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_612ece3fa3841412e4bcca5af765dce2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_255a6dc295ae3be7fe040b1235d5eba9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae4dc857731e4cd8824c3226e19af967
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b02fc30690b17f82814aabd49fb02d5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_132ab00ebddb07abd180b0ddfa68741c |
| publicationDate |
2003-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
RU-2213723-C2 |
| titleOfInvention |
Method for preparing bis-(4-hydroxyaryl)alkanes |
| abstract |
FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to isolation of bis-(4-hydroxyaryl)alkanes and aromatic hydroxy-compounds. Adducts are prepared by acid-catalyzed interaction of aromatic hydroxy-compounds with ketones followed by addition of solution of alkaline metal hydroxide to adduct in crystalline form as aerosol. The parent aqueous solution comprises 0.005-0.015 wt.-% of hydroxide. Then adduct is decomposed by distillation and end product is separated from aromatic hydroxy-compound. Mass consumption of alkaline metal is corrected by content of by-side products in preparing bis-(4-hydroxyaryl)alkane. Bisphenol A of high purity is prepared from adduct of bisphenol A and phenol preferably. Method provides significant reduction of impurities in preparing bis- (4-hydroxyaryl)-alkane with high purity degree. EFFECT: improved preparing method, enhanced quality of product. 6 cl, 3 ex |
| priorityDate |
1998-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |