http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CZ-2000521-A3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b9ff2988b0c12145a439b1a8945d0e6d |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-905 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-901 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-1809 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-69 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-02 |
| filingDate | 1998-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3f6a521c7bc208066de532108cc4f033 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_27e3676d818887cbcf52c8d276f62565 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_026e2e488b227a13491d3ef558a258ae http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0bc65efc960a3218ffc1d1e7898804f |
| publicationDate | 2000-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CZ-2000521-A3 |
| titleOfInvention | Process for producing high density polyethylene |
| abstract | A process for preparing high density polyethylene in the gas phase comprising contacting a mixture comprising ethylene and one or more alpha-olefins with the supported reaction product of a bis-hydrocarbylsilyl chromate and a hydrocarbylaluminum compound or a hydrocarbyl boron compound in a fluidized bed reactor having a recycle gas line, under polymerization conditions, with the following provisos: (i) the atomic ratio of aluminum to chromium is in the range of about 0.1:1 to about 2.9:1; (ii) the amount of catalyst is in the range of about 0.005 to about 0.25 part by weight based on 100 parts by weight of the high density polyethylene; (iii) the partial pressure of ethylene is in the range of about 200 to about 400 psia; (iv) oxygen and/or another catalyst poison is introduced into the reactor in the range of about 0.005 to about 0.5 part by volume of catalyst poison per million parts by volume of ethylene; (v) the molar ratio of alpha-olefin to ethylene is about 0.0001:1 to about 0.1:1; (vi) hydrogen is introduced into the reactor in the range of about 0.005 to about 0.5 mole of hydrogen per mole of ethylene; (vii) the polymerization is carried out at a temperature in the range of about 80 to about 110 degrees C; and (viii) a relatively low boiling inert hydrocarbon is introduced into the recycle gas line in an amount sufficient to raise the dew point of the recycle gas, which is comprised of alpha-olefins and other reactor gases, and the recycle gas is partially condensed and recycled to the reactor where it promotes cooling by evaporation. |
| priorityDate | 1997-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 102.