| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0a906fcc273ed8131a3b80b3b8e9bb31 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-15
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2500-12 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-6543
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-001
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-654
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate |
2013-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_941dfed0f9066537c7d1c7472d378e7c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e77ecfc037d4b7ca82b4649760c17d4a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_12b8cb6d7a4f0fe40760948a0ccaa5c3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5a1d5debec92af2130313ac188ea7d9f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9113ac7fb0d50ba0b1748f0d62a0403c |
| publicationDate |
2015-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-2882781-A1 |
| titleOfInvention |
Process for the preparation of polypropylene with improved productivity |
| abstract |
The present invention relates to a process for the preparation of a polypropylene in a sequential polymerization process comprising a pre-polymerization reactor and at least two polymerization reactors connected in series, wherein the polymerization in the at least two polymerization reactors takes place in the presence of a Ziegler-Natta catalyst, and said Ziegler-Natta catalyst comprises: (a) a pro-catalyst comprising (a1) a compound of a transition metal, (a2) a compound of a metal which metal is selected from one of the groups 1 to 3 of the periodic table (IUPAC), (a3) an internal electron donor, (b) a co-catalyst, and (c) an external donor, wherein said Ziegler-Natta catalyst is present in the pre-polymerization reactor and ethylene (C2) in addition to propylene (C3) is fed to said pre-polymerization reactor in a C2/C3 feed ratio of 0.5 to 10.0 g/kg. |
| priorityDate |
2012-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |