Process for producing ethylene/1-octene copolymers having reduced stickiness
US5100979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process comprising contacting a mixture comprising ethylene and 1-octene in the gas phase, in a fluidized bed reactor, under polymerization conditions, with a catalyst system comprising: PA1 (a) the reaction product of a vanadium compound and an electron donor impregnated into an inorganic support; PA1 (b) a halocarbon promoter; and PA1 (c) a hydrocarbyl aluminum cocatalyst with the following proviso: PA2 (i) the partial pressure of ethylene is in the range of about 50 to about 90 psi; PA2 (ii) the partial pressure of 1-octene is in the range of about 1.5 to about 2.5 psi; PA2 (iii) the temperature in the reactor is in the range of about 5.degree. C. to about 20.degree. C. above the dew point of 1-octene; PA2 (iv) the molar ratio of 1-octene to ethylene is in the range of about 0.02:1 to about 0.04:1; and, optionally, PA2 (v) the superficial gas velocity is in the range of about 1.4 to about 2.7 feet per second.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.