| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fab82a381f9d0ff8a604cb09e446c878 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-907
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-904
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-901 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-04 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F110-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F110-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-654
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-646
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-04 |
| filingDate |
1989-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_31412a8318cd629e30f8d4de93fd1cbc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e4a7b9c7e7e26640a6a9d2f49664aa6e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_256f5bd4f164776d66fe0853b5eb9c4c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2bccf585235ce109be9a28fe4ce8d0e |
| publicationDate |
1990-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0368631-A2 |
| titleOfInvention |
A process for the homo- or copolymerization of alpha-olefin, and a catalyst system used in the process |
| abstract |
The polymerization of alpha-olefins in a gas phase involves the problem of agglomeration of the product into particles disadvantageous from the viewpoint of its handling. In the present invention this problem has been solved by means of a new type of process for the homo- or copolymerization of alpha-olefins. In the process the catalyst system is pretreated by contacting and reacting a transition-metal compound which is solid or on a solid carrier with an organoaluminum compound, and possibly an electron donor, in a liquid medium, and by drying the thus formed reaction product to produce a solid catalyst system. The thus pretreated solid and active catalyst system is then fed together with an alpha-olefin in the gaseous state into a gas-phase reactor, and polymerization is carried out by contacting them with each other. By feeding a dry and active catalyst system into the gas-phase reactor, it is possible to avoid the agglomeration of the product which occurs in conventional processes in which an organoaluminum compound and possibly an electron donor are fed in a liquid medium into the reactor. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AU-762010-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9945043-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6429270-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0015673-A1 |
| priorityDate |
1988-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |