http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1212370-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2648 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 | 2000-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4d8aced828819befe0856c3768e6a1db http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a12512924be9ba776d8cf39995e974c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef7cbcb396e0fa72a7836b704881e5bd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eff91e68a40cb90df7019eed2bedc025 |
| publicationDate | 2002-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1212370-A1 |
| titleOfInvention | Process for purifying polyethers |
| abstract | This invention involves several ways for improving a coalescing process for purifying a crude polyether. In one aspect, particulate zirconium dioxide is selected as a coalescing medium. In a second aspect, alkali metal catalyst is recovered and recycled to make additional polyether product. In a third aspect, a polyether stream obtained from the coalescing step is purified by stripping water in at least two phases, the first of which involves moderate conditions so that water but not allyl alcohol or higher molecular weight impurities are removed from the polyether, and the second of which involves more stringent stripping conditions. In a fourth aspect, crude polyether that is subjected to a holding period before undergoing a coalescing step is mixed with water to minimize the formation of impurities that are believed to compatibilize the aqueous and polyether phases. In a fifth aspect, the coalescing process is conducted under a non-oxidizing atmosphere. |
| priorityDate | 1999-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.