| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c241fa141b1dacb2875c9a6d34f62fb4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ddce09c5e439207b4d4bf8204f926744
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_12847b111993bc065ad87ae74ec6fb66 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-30 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate |
2009-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_423dda3e1edcc636492bd5afa5302f99
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_109f93d0af8c87a0d1fe2117841727ba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85756beeae659f3113cf5f8bc26d5449 |
| publicationDate |
2009-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2009143625-A1 |
| titleOfInvention |
Process for the preparation of polyether polyols |
| abstract |
A process for the preparation of a polyether polyol containing at most about 15 ppm of sodium and potassium, comprising: (a) reacting an initiator having at least two active hydrogen atoms with at least one alkylene oxide in the presence of a catalyst having an alkali metal hydroxide to form a polyether polyol reaction product; (b) neutralizing the polyether polyol reaction product obtained in step (a) by contacting this reaction product with phosphoric acid and water; and (c) removing the salt crystals from the polyether polyol and recovering the neutralized polyether polyol containing at most about 15 ppm of sodium and potassium, wherein no adsorption agent and no hydrate of a metal salt of the acid are used before, during or after the neutralization. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012078018-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9012695-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10597490-B2 |
| priorityDate |
2000-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |