| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f6e960aa6ad2ba6401030159343ebe68 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65912
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L2207-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-943 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-642
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F6-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L23-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L21-00 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-659 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L21-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L23-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F6-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-06 |
| filingDate |
1993-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1997-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48a522ee2eec3849752cb2b82057f39b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92fe3d7011d6c561faf3dce93e58c909
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6cbc5816a6284e745068d9950e0ee693
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8543184af54c71d76cd15c19e86eeba4 |
| publicationDate |
1997-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2087916-C |
| titleOfInvention |
Process for the preparation of polyolefin |
| abstract |
A first process for the preparation of polyolefin according to the invention is a process comprising polymerizing or copolymerizing olefin in the presence of a catalyst for olefin polymerization comprising [A] a metallocene compound of a transition metal selected from Group IVB of the periodic table, and [B] an organoaluminum oxy-compound; wherein the organoaluminum oxy-compound [B] is added to the polymerization system in the form of a slurry of said organoaluminum oxy-compound [B] in an aliphatic hydrocarbon or alicyclic hydrocarbon, and the polymerization is carried out in the presence of an aliphatic hydrocarbon diluent or an alicyclic hydrocarbon diluent. A second process for the preparation of polyolefin according to the invention is a process comprising: (i) polymerizing or copolymerizing olefin in a liquid phase in the presence of the above-mentioned catalyst; and (ii) feeding a polymer solution containing the resulting polyolefin from a polymerization zone to a separation zone kept at a temperature of not lower than the upper cloud point of the polymer solution to separate the polymer solution into a lower phase portion containing the polyolefin in a high concentration and an upper phase portion, so as to recover the polyolefin from the lower phase portion in the separation zone and to recycle at least a part of the upper phase portion to the polymerization zone. |
| priorityDate |
1992-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |