Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-04-07
1978-12-05
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252428, 252429R, 252431R, 526 96, B01J 3102, B01J 3112
Patent
active
041285000
ABSTRACT:
A catalyst and the method of making same and a method of making polymers of 1-olefins with said catalyst in which the catalyst is prepared by chemically modifying a finely divided, difficultly reducible, inorganic support of the nature of silica, alumina, thoria, titania, magnesia and mixtures thereof by adding to the support a zirconium compound before dispersing on the modified support a chromium chelate derived from a beta-dicarbonyl compound that may be either acyclic or cyclic, the chelate being essentially of the formula ##STR1## WHEREIN R is individually selected from hydrogen, alkyl, alkenyl, aryl, cycloalkyl and cycloalkenyl radicals and combinations of these radicals with each R containing 0-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, R' is selected from alkylene, alkenylene, arylene, cycloalkylene and cycloalkenylene radicals and combinations of these bivalent radicals with R' containing 1-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, m is a whole number of 1 to 3, n is a whole number of 0 to 2 and m plus n is 2 or 3 and X is an inorganic or organic negative group (relative to chromium) such as halide, alkyl, alkoxy and the like, followed by activating by heating to and at an elevated pyrolytic temperature of about 800.degree.-2000.degree. F. in a non-oxidizing (either inert or reducing) atmosphere. Typical compounds are chromium acetylacetonate, chromium benzoylacetonate, chromium 5,5-dimethyl-1,3-cyclohexanedionate, chromium 2-acetylcyclohexanonate, and the like.
REFERENCES:
patent: 3740384 (1973-06-01), Ballard et al.
patent: 3756998 (1973-09-01), Karapinka
patent: 3844975 (1974-10-01), Karol
patent: 3953413 (1976-04-01), Hwang et al.
J. of Organic Chemistry, 28 (Jul. 1963), pp. 1947-1948.
Grimmett Howard L.
Hwang Yu-Tang
Garvin Patrick P.
Wright William G.
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