| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-266 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J21-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate |
1992-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1995-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_941fea6dbfc913304fccac64f611f27f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_903c186f01b223390c02c0c50ad92ecd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0931720d57fd39fa87f08514e04338e |
| publicationDate |
1995-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0573602-B1 |
| titleOfInvention |
Preparation of polytetramethylene ether glycol using an acidic zirconia catalyst |
| abstract |
A process for polymerizing tetrahydrofuran to produce polytetramethylene ether glycol or ester-capped polytetramethylene ether glycol is disclosed. The reaction mass is carried out at 10° to 80 °C and preferably 20° to 60 °C. In a preferred aspect of the invention, a mixture of acetic anhydride and acetic acid is present in the reaction mixture. |
| priorityDate |
1991-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |