Ethylene polymerization catalysts

Details Ethylene polymerization catalysts Ethylene polymerization catalysts

1976-07-06

1977-10-04

Holler, Alan

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252428, 252467, 526106, 526120, C08F 402, C08F 412, C08F 424, C08F 1000

Patent

active

040525449

ABSTRACT:
Novel catalysts are provided for the polymerization of olefins such as ethylene. The catalysts consist essentially of a chromium compound supported upon an inorganic carrier containing aluminum and arsenate moieties. The inorganic carrier is an amorphous precipitate of aluminum arsenate, or an amorphous coprecipitate containing aluminum and arsenate moieties in proportions such that the aluminum and arsenic are present in an atomic ratio in the range of 5:1 to 1:1. The catalysts are particularly useful for polymerizng ethylene in a Particle Form Process in that the catalysts have essentially no induction period and provide ethylene polymers having a desirably-broad molecular weight distribution and a desirably-high melt flow shear ratio.

REFERENCES:
patent: 2825721 (1958-03-01), Hogan et al.
patent: 2930789 (1960-03-01), Kerber et al.
patent: 2959577 (1960-11-01), Hogan
patent: 3196139 (1965-07-01), Best

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