Catalyst and process of preparing the catalyst

Details Catalyst and process of preparing the catalyst Catalyst and process of preparing the catalyst

1978-07-17

1980-01-22

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252428, 252431R, 252431C, 526 95, 526113, C08F 422, C08F 476

Patent

active

041849795

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.

REFERENCES:
patent: 3622521 (1971-11-01), Hogan et al.
patent: 3625864 (1971-12-01), Horvath
patent: 3780011 (1973-12-01), Pullukat et al.
patent: 3798202 (1974-03-01), Nasser
patent: 3879362 (1975-04-01), Chalfont et al.
patent: 3882096 (1975-05-01), Shida et al.
patent: 3953413 (1976-04-01), Hwang et al.
patent: 3976632 (1976-08-01), Delap
patent: 4041224 (1977-08-01), Hoff et al.

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