http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3858889-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad2790f76726483146bfee21e3acd7ac |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-8953 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-0208 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2612 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2609 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2615 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2663 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2696 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-006 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate | 2019-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76095e5ca067279e39df44aafdc0b893 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_40d28ce890628c96f969805ed7dc8fce |
| publicationDate | 2021-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3858889-A1 |
| titleOfInvention | Mixed acid-modified zinc-cobalt two-metal cyanide catalyst and preparation method thereof |
| abstract | The disclosure provides a double metal cyanide catalyst, a method for preparing the double metal cyanide catalyst and a method for catalyzing a polymerization reaction using the double metal cyanide catalyst. The metal elements of the catalyst comprise only the two metal elements of zinc and cobalt, besides impurities. The catalyst is obtained by reacting water-soluble metal salts of zinc and cobalt in water-soluble solvents. The catalyst is modified by a mixed acid during synthesis, the mixed acid comprising at least one organic acid and at least one water-soluble inorganic acid. the water-soluble inorganic acid is selected from the group consisting of diluted sulfuric acid and diluted hydrochloric acid, with a pH value being in the range of 0 to 5; and the organic acid is any one or more selected from the group consisting of succinic acid, glutaric acid, phthalic acid, iminodiacetic acid, pyromellitic acid, and 1,2,3,4-butanetetracarboxylic acid, the water-soluble inorganic acid and organic acid being in a molar ratio of 1:10 to 10:1. The catalyst of the present disclosure has a high activity and a strong thermal stability, achieving a higher catalytic activity for a polymerization reaction, a high polymer product yield and a higher selectivity over the polycarbonate segment on the polymer backbone with a lower catalyst concentration and a higher initiator concentration. |
| priorityDate | 2018-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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