| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b8ab726017739a0a4a21cebe97413d7a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_262b1d9bbce9a6ee989453843307bb34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7e4870a7738b243c0fe39026e2caa17b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4526d0c3145b854cbb5be226babf2115
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f873e576887881339d4b8b84223fff98 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2410-05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-6546
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-651
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65925
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65912
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/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-42 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6592
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-659 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00 |
| filingDate |
2004-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_076cb19af429071d25ae9b6d9be5debb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5207899bbfe643fa020f5f25fd130a1a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b9b4de33b2e80f62a07f3472ab3b25cd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b15a9999a0ad7e7fc30cb8bc0c56e660
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b398692716bfa4e96dbb0d9498604989 |
| publicationDate |
2004-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2004214969-A1 |
| titleOfInvention |
Processes for transitioning between chrome-based and mixed polymerization catalysts |
| abstract |
A process of transitioning from a first polymerization reaction conducted in the presence of a mixed catalyst system comprising to a second polymerization reaction conducted in the presence of a chrome-based catalyst system is disclosed, the polymerization reactions being conducted in one embodiment in a polymerization zone of a gas phase fluidized bed reactor which contains a fluidized bed of polymer particles by the essentially continuous passage of monomer gases through the polymerization zone, comprising: n a) discontinuing the introduction of the mixed catalyst system into the reactor; n b) maintaining polymerization conditions in the reactor and permitting polymerization to continue for a period of time to allow the components of the mixed catalyst system present in the reactor to produce additional polymer particles; n c) introducing a deactivating agent into the fluidized bed in an amount sufficient to deactivate the mixed catalyst system; n d) establishing optimal conditions within the reactor for the chrome-based catalyst system; and n e) introducing the chrome-based catalyst system into the reactor characterized in that the amount of polymer particles in the fluidized bed is substantially maintained in the polymerization zone during the transition steps. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8846829-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9469755-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006130310-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2018051102-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114621378-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10494455-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10494454-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7808227-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014095626-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9505919-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2016151098-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8940239-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012283395-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008042655-A1 |
| priorityDate |
2002-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |