Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1979-02-02
1980-09-23
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252428, 252430, 252431R, 252431C, 526352, 526907, C08F 422, C08F 424, C08F 478
Patent
active
042244285
ABSTRACT:
A catalyst for polymerizing one or more 1-olefins and prepared by the process of (1) forming an initial mixture of a finely divided support such as silica and a chromium.sup.+3 compound of either of the formulas ##STR1## or Cr(OOCR).sub.3 or a mixture in an amount to provide about 0.1-30 weight percent of chromium in the finished catalyst and in which each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms and the necessary hydrogen atoms, followed by (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas and heating to a temperature of about 230.degree.-540.degree. C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95.degree.-370.degree. C., and then (4) activating the mixture of (3) by heating in a dry, oxidizing atmosphere such as dry air to a temperature of about 370.degree.-1100.degree. C. The disclosure also includes a method of preparing such a catalyst and the method of polymerizing at least one 1-olefin with said catalyst.
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Kirch William
Thompson Paul A.
Chemplex Company
Levin Stanford M.
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