PHOSPHATED ALUMINA OR ALUMINUM PHOSPHATE CHROMIUM CATALYST

摘要

? catalyst system suitable for olefin polymerization comprising ? catalyst component made up of ? on a phosphated alumina or low ? aluminum phosphate base and optionally an organometal catalyst. The resulting catalyst is particularly sensitive to the effects of hydrogen as molecular weight control agent, thus allowing the production of polymers of having a melt flow varying over a wide spectrum utilizing the same catalyst.