Method of making polymers and copolymers of 1-olefins

Details Method of making polymers and copolymers of 1-olefins Method of making polymers and copolymers of 1-olefins

1980-07-07

1981-12-01

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252430, 252431R, 252431C, 252432, 252467, 252469, 526106, 5263486, 526352, 526901, 526907, C08F 402, C08F 424

Patent

active

043037704

ABSTRACT:
A new catalyst and a method of polymerizing olefins in which the catalyst is prepared (1) by forming a mixture by dispersing on a finely divided, difficult to reduce, inorganic support of silica, alumina, thoria, zirconia, titania, magnesia or mixtures of these a tetravalent or lower valent organic chromium compound, (2) calcining the mixture of (1) in an oxidizing or inert atmosphere and at an elevated temperature to produce a chromium compound on the support, (3) reacting the product of (2) with an alkyl ester of titanium, boron, vanadium or mixtures thereof or boric acid at an elevated temperature, and (4) activating the product of (3) with a dry gas that contains oxygen by heating at an elevated temperature the product of (3) in this dry gas.

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