| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2657
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-2642
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-26 |
| filingDate |
1998-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56dbaf45400e4688805e38d614844ac5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3d97bfb3af75d8dd34ce6edab6d991e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9e93db4d1efbf8018fdfe4893b85359
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48cb647642e9ce80ee1368fe6fa4c3be |
| publicationDate |
2001-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6274700-B1 |
| titleOfInvention |
Catalyst and method for producing polytetrahydrofuran |
| abstract |
In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over acid-activated montmorillonite catalysts, the montmorillonite catalyst after acid activation has a ratio of montmorillonite structure to the sum of muscovite and kaolin structures, determined from the intensities of the reflections at 2theta=5.5° for montmorillonite, 2theta=9.0° for muscovite and 2theta=12.5° for kaolin measured in the X-ray powder pattern, of at least 5:1. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008108786-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009029121-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7456249-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7449422-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006046925-A1 |
| priorityDate |
1997-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |