http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100841603-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1bc8d5b80410c3a0594da023cfabcbe0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2666 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-00 |
| filingDate | 2007-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2008-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7509ddf8e2e3faea46f25ffec3f4dd52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4cb2eb99c34e08a8b8184b9581dff03 |
| publicationDate | 2008-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-100841603-B1 |
| titleOfInvention | Method for preparing tetrahydrofuran polymer |
| abstract | The present invention relates to a method for preparing a polymer of tetrahydrofuran (THF) by using a heteropoly acid, specifically a high purity heteropoly acid having an alkali content of impurities such as Na, Mg and Ca of 100 ppm or less as a catalyst The present invention relates to a method for producing polytetramethylene glycol, which is a THF homopolymer or copolymer. The production method according to the present invention is characterized in that the content of Na, Mg, and Ca in the heteropolyacid is 100 ppm or less, respectively. |
| priorityDate | 2007-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.