Process for the preparation of high density ethylene polymers in fluid bed reactor
US4303771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1979 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Feb 16, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalytic process for preparing ethylene polymers having a density of .gtoreq.0.94 to .ltoreq.0.97 and a melt flow ratio of about .gtoreq.22 to .ltoreq.32 in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti with a catalyst formed from selected organoaluminum compounds and a precursor composition of the formula EQU Mg.sub.m Ti.sub.1 (OR).sub.n X.sub.p (ED).sub.q wherein ED is a selected electron donor compound PA0 m is .gtoreq.0.5 to .ltoreq.56 PA0 n is 0, 1 or 2 PA0 p is .gtoreq.2 to .ltoreq.116 PA0 q is >1.5 m+2 PA0 R is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, and PA0 X is selected from the group consisting of PA0 Cl, Br, I or mixtures thereof, PA0 which catalyst is in particulate form and impregnated in a porous inert carrier material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.