Polymerization with sublimed chromium catalyst

Details Polymerization with sublimed chromium catalyst Polymerization with sublimed chromium catalyst

1979-12-06

1981-04-14

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252458, 252465, 252468, 252469, 5263486, 526352, 526907, C08F 424

Patent

active

042621020

ABSTRACT:
A catalyst, a process of preparing the catalyst and a method of making polymers and copolymers of 1-olefins with the catalyst in which the catalyst is prepared by producing finely divided particles of chromium metal by a sublimation process and dispersing the sublimate of chromium particles with an organic liquid and providing a mixture comprising the chromium sublimate particles and a support such as silica. The mixture is then heat activated in an oxidizing atmosphere. In another aspect of the invention the chromium sublimate particles and support particles are further modified by having a titanium compound as a part of the mixture of chromium sublimate particles and support particles.

REFERENCES:
patent: 2825721 (1958-03-01), Hogan et al.
patent: 3346511 (1967-10-01), Hill
patent: 3780011 (1973-12-01), Pullukat et al.
patent: 4041224 (1977-08-01), Hoff et al.

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