| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_78ca80ad4b743c901ec136b21263f093 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2410-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-6592
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2410-05 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-6592
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-001 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6592 |
| filingDate |
2016-11-29^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_175a6ecd758a9fd4d6ba644e860d0367
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_21f3dffc9926d5a620c8977165c2f018
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2d7c0824210233d8e6cc83e18152f771 |
| publicationDate |
2020-08-27^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2020270373-A1 |
| titleOfInvention |
Process for transitioning between incompatible catalysts |
| abstract |
The invention relates to a process for transitioning from a first continuous polymerization in a gas phase reactor conducted in the presence of a metallocene catalyst to a second polymerization conducted in the presence of a Ziegler-Natta catalyst in the gas phase reactor wherein the metallocene catalyst and the Ziegler-Natta catalysts are incompatible, the process comprising: (a) discontinuing the introduction of the metallocene catalyst into the gas phase reactor; (b) introducing an effective amount of cyclohexylamine into the reactor to at least partially deactivate the metallocene catalyst; (c) introducing an organometallic compound into the reactor and reacting the organometallic compound with cyclohexylamine; (d) degas the gas composition of the reactor and build up a new composition inside the reactor for the second polymerization with the Ziegler-Natta catalyst (e) introducing the Ziegler-Natta catalyst into the reactor. |
| priorityDate |
2015-12-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |