http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3293206-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_008c81123c3ccee6fee58519eba8580d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8b4a4d5069207619c5f2b9a383a6c334 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2203-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2207-068 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2314-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2314-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L9-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-245 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D19-0036 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-0815 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L23-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L23-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate | 2016-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bf38d209e131467c342b3d5b1cc76686 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_66cc0e94f9635cbed25578523f39d354 |
| publicationDate | 2018-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3293206-A1 |
| titleOfInvention | Multimodal polyethylene pipe |
| abstract | The present invention relates a to process for producing a multimodal polyethylene composition in the reactor system according to any of the claims 1 to 3, comprising; n(a) polymerizing ethylene in an inert hydrocarbon medium in the first reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen in an amount of 0.1-95% by mol with respect to the total gas present in the vapor phase in the first reactor to obtain a low molecular weight polyethylene or medium molecular weight polyethylene, n(b) removing in the hydrogen removal unit 98.0 to 99.8% by weight of the hydrogen comprised in a slurry mixture obtained from the first reactor at a pressure in the range of 103-145 kPa (abs) and transferring the obtained residual mixture to the second reactor; n(c) polymerizing ethylene and optionally C 4 to C 12 α-olefin comonomer in the second reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and in the presence of hydrogen in an amount obtained in step (b) to obtain a first high molecular weight polyethylene or a first ultra high molecular weight polyethylene in the form of a homopolymer or a copolymer and transferring a resultant mixture to the third reactor; and n(d) polymerizing ethylene, and optionally C 4 to C 12 α-olefin comonomer in the third reactor in the presence of a catalyst system, selected from Ziegler-Natta catalyst or metallocene, and hydrogen, wherein the amount of hydrogen in the third reactor is in a range of 0.1-70% by mol, preferably 0.1-60% by mol with respect to the total gas present in the vapor phase in the third reactor or optionally substantial absence of hydrogen to obtain a second high molecular weight polyethylene or a second ultra high molecular weight polyethylene homopolymer or copolymer. n As well as to a multimodal polyethylene composition obtainable this way and a pipe formed of this composition. |
| priorityDate | 2016-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 60.