http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2261256-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate | 2001-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2005-09-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_470d24bf94c140e6517597182427fe35 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_40676ae5fcb4178bd466fe875834ab0b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f65cc17cc29900b9a0e363a315f2a9bf |
| publicationDate | 2005-09-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2261256-C2 |
| titleOfInvention | Polyether-polyol production process |
| abstract | FIELD: industrial organic synthesis. n SUBSTANCE: process of producing polyether-polyols containing at most 15 ppm sodium or potassium comprises following steps: (a)interaction of initiator having at least to active hydrogen atoms with at least one alkylene oxide in presence of catalyst containing alkali metal hydroxide to form polyether-polyol reaction product; (b) neutralization of polyether-polyol reaction product obtained in step (a) by bringing it into contact with acid having pKa below 5 and water, said acid and said water being introduced in such an amounts that finally content of water is 1 wt % or of the total weight of polyether-polyol present, while molar ratio of acid to alkali metal hydroxide ranges from 0.3:1 to 1.0:1; optionally (c) reduction of content of water in reaction mixture to 0.5 wt % or less of the total weight of polyether-polyol; and (d) removal of salt crystals from polyether-polyol and recovery of neutralized polyether-polyol containing not more than 15 ppm sodium and/or potassium. In the course of neutralization, magnesium silicate or aluminum silicate is added in amount below 0.05 wt parts per 100 wt parts of polyether-polyol and also hydrated inorganic acid metal salt in amount 0.01% of the weight of polyether-polyol. n EFFECT: minimized consumption of heat during neutralization step and reduced neutralization time. n 7 cl, 6 ex |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2765641-C2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2492190-C2 |
| priorityDate | 2000-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.