http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10032266-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20 |
| filingDate | 2000-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac4038cc45cfa26ece548605105986f2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_66b8b2aafd6f1f4700f3a5317c82b6bb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92cadc32094be2782a94818863990377 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_097af80abd47f1973e8c3bc1c23e5dca http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2dd688806ae8aa93aed6144d0af4433d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44b3ae2ef15a8566ddd53f8d0cfabe5c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_860ae93f847b31d9c8671ab1866dbbb5 |
| publicationDate | 2002-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-10032266-A1 |
| titleOfInvention | Improved process for the one-step production of polytetrahydrofuran and tetrahydrofuran copolymers |
| abstract | The present invention relates to a process for the one-stage preparation of polytetrahydrofuran and / or tetrahydrofuran copolymers having an average molecular weight of 650 to 5000 daltons by the polymerization of tetrahydrofuran over an acidic heterogeneous catalyst in the presence of at least one telogen and / or comonomer from the group of the alpha , omega diols, water, polytetrahydrofuran with a molecular weight of 200 to 700 daltons and / or the cyclic ethers, characterized in that DOLLAR A a) the suspended and / or dissolved catalyst fractions and / or secondary catalyst products contained in the polymerization discharge are separated off, DOLLAR A b) a separation into a distillation residue containing the polymerization product and at least one tetrahydrofuran fraction is carried out from the catalyst-free polymerization product obtained in at least one distillation stage and the tetrahydrofuran fraction is at least partially in d ie the polymerization is recycled and DOLLAR A c) is separated from the distillation residue of the working-up stage b) low molecular weight polytetrahydrofuran and / or tetrahydrofuran copolymers with an average molecular weight of 200 to 700 daltons and polytetrahydrofuran and / or tetrahydrofuran copolymers with an average molecular weight of 650 to 5000 daltons is won. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7544766-B2 |
| priorityDate | 2000-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.