| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28f20ac45ce702138202014800bee672
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e3b3f4f8df8306f743faf2d4a4af65e1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b0f2d2bdf1f86398f2961168358b4ba9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d36fc109c10f180308c9716f76c1aac9 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00006
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00114
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-0011
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-0004
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00054
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2308-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-0013
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F6-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F6-001 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-00 |
| filingDate |
2010-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2013-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8708d86351943a216a55ee5bd73e1dae
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4f88429c89cfb526e9f38d5cec944c2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8a472eb5a504cb709c393c4a7d0f811a |
| publicationDate |
2013-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-8557932-B2 |
| titleOfInvention |
Process for the preparation of a multimodal polyolefin polymer with improved hydrogen removal |
| abstract |
Process for the preparation of a multimodal polyolefin polymer at temperatures of from 40 to 150° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst in a first and a second polymerization reactor connected in series, wherein further polymerization reactors can be connected to said reactors upstream or downstream of said reactors, in which in the first polymerization reactor a first polyolefin polymer is prepared in suspension in the presence of hydrogen and in the second polymerization reactor a second polyolefin polymer is prepared in the presence of a lower concentration of hydrogen than in the first polymerization reactor, comprisingn a) withdrawing from the first polymerization reactor a suspension of solid polyolefin particles in a suspension medium comprising hydrogen; b) feeding the suspension to a flash drum of a lower pressure than that of the first polymerization reactor; c) vaporizing a part of the suspension medium; d) withdrawing a hydrogen-depleted suspension from the flash drum and feeding it to the second polymerization reactor; e) withdrawing gas from the gas-phase of the flash drum and feeding it to a heat exchanger; f) condensing a part of the gas withdrawn from the flash drum; and g) returning the liquid obtained in the heat exchanger to the polymerization process at a point where suspension is present,n nand apparatus for preparing a multimodal polyolefin polymer according to the process. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11597783-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019228791-A1 |
| priorityDate |
2009-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |