http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2841995-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_96ec3985e3ce9b24614fb87bf51a4f12 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2603 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2663 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate | 2012-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ed674841e5e41b4420ab40fe599c55e9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e49b2beabe8c06c804853b6fb5fbc64a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_819d46675b9ca9b0f33e2cea8de54a84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d1918d7bc4e0f1e059215bfeb14522e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad2c492958bbc15ea2f1cd6ab31c0616 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3bd7d4d6f05624f0e7deb25480086b0a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3bea014ecedf6104563eecc8f94b1c37 |
| publicationDate | 2013-01-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2841995-A1 |
| titleOfInvention | Method for producing polyether polyols |
| abstract | The invention relates to a method for producing polyether carbonate polyols from one or more H-functional starter compounds, one or more alkylene oxides, and carbon dioxide in the presence of a double metal cyanide catalyst. The method has the following steps: (a) the H-functional starter substances or a mixture of at least two H-functional starter substances are introduced; (ß) a sub-quantity (with respect to the total quantity of the alkylene oxides used in the steps (ß) and (?)) of one or more alkylene oxides is added to the mixture resulting from step (a) for the purpose of activation, wherein the step (ß) can also be carried out multiple times for the purpose of activation; and (?) one or more alkylene oxides and carbon dioxide are continuously metered into the mixture resulting from step (ß) (copolymerization), the alkylene oxides used for the copolymerization being the same or different from the alkylene oxides used in step (ß). The invention is characterized in that the carbon dioxide is introduced into the mixture in step (?) by (i) gassing the reaction mixture in the reactor from below, (ii) using a hollow shaft stirrer, (iii) combining the controlled deliveries according to (i) and (ii), and/or (iv) gassing over the liquid surface using multi-stage stirring elements. |
| priorityDate | 2011-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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