Catalyst and method
AssigneeChemplex Company
InventorYu-Tang Hwang
Life of this patent
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Abstract
A new catalyst and method of making polymers therewith and the process of preparing the catalyst in which the catalyst is prepared by dispersing on a finely divided carrier material, particularly a difficultly reducible inorganic support such as silica, an organic chromium complex such as a chelate derived from orthohydroxyphenyl or 2'-hydroxyphenyl carbonyl compounds, including ketone, aldehyde and amide types, and their derivatives, and activating the resulting mixture by heating at an elevated temperature in a non-oxidizing atmosphere.
Claims35
A catalyst prepared by dispersing on a finely divided, difficultly reducible, inorganic support of the class consisting of silica, alumina, thoria, zironia, titania, magnesia, and mixtures thereof a chromium chelate of an orthohydroxy carbonyl compound essentially of the formula of the class consisting of ##STR2## wherein R is individually selected from hydrogen, alkyl, alkenyl, aryl, cycloalkyl, cycloalkenyl, and arylalkyl radicals and combinations of these radicals with each R containing 0-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, X is a negative group relative to chromium selected from the group consisting of halide, alkyl and alkoxy, Y is selected from hydrogen, hydroxyl, alkoxy, and alkyl groups, 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 activating the resulting mixture by heating to and at an elevated temperature of from about 600-2000.degree. F. in a non-oxidizing atmosphere.
The process of preparing an active polymerization catalyst comprising the steps of dispersing on a finely divided, difficultly reducible, inorganic support of the class consisting of silica, alumina, thoria, zirconia, titania, magnesia, and mixtures thereof a chromium chelate of an orthohydroxy carbonyl compound essentially of the formula of the class consisting of ##STR5## wherein R is individually selected from hydrogen, alkyl, alkenyl, aryl, cycloalkyl, cycloalkenyl, and arylalkyl radicals and combinations of these radicals with each R containing 0-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, X is a negative group relative to chromium selected from the group consisting of halide, alkyl and alkoxy, Y is selected from hydrogen, hydroxyl, alkoxy, and alkyl groups, 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 activating the resulting mixture by heating to and at an elevated temperature of from about 600.degree.-2000.degree. F. in a non-oxidizing atmosphere.
Dependencies are inferred from the claim text.