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 difficulty reducible inorganic support such as silica, an organic chromium compound or complex such as a chelate derived from an N-nitroso-substituted N-arylhydroxylamine, N-nitroso-substituted hydroxamic acid, N-aryl-substituted hydroxamic acid, or an aromatic hydroxamic acid with or without an N-substituent and activating the resulting mixture by heating at an elevated temperature in a non-oxidizing atmosphere.
Claims41
A catalyst prepared by dispersing on a finely divided, difficultly reducible, inorganic support of the class consisting of silica, alumina, thoria, zirconia, titania, magnesia, and mixtures thereof an organic nitrogen containing chromium 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, 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, 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.
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 an organic nitrogen containing chromium compound essentially of the formula of the class consisting of ##STR7## wherein R is individually selected from hydrogen, alky, 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, 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, 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.