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US 4,397,761 AGranted
Phosphate containing support for vanadium catalyst
AssigneePhillips Petroleum Company
InventorsMax P. McDaniel, Marvin M. Johnson
Life of this patent
Estimating the term…
Abstract
A supported vanadium catalyst comprising a vanadium compound on a phosphate-containing base. This catalyst in conjunction with an organoaluminum cocatalyst is capable of giving good activity and producing a polymer having broad molecular weight distribution. The catalyst system is sufficiently sensitive to hydrogen to allow broad leeway in controlling the molecular weight of the resulting polymers.
Claims38
A catalyst system comprising:
- (a) a catalyst comprising an activated vanadium compound on a phosphate-containing support;
- and
- (b) an organoaluminum cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
A method of producing a catalyst system comprising:
- (a) forming a supported catalyst by forming an aluminum phosphate hydrogel, converting said hydrogel to a xerogel,
- introducing a vanadium compound by one of coprecipitating with said aluminum phosphate, adding an aqueous solution of a vanadium compound to said hydrogel or adding a non-aqueous solution of a vanadium compound to said xerogel, and
- activating said xerogel containing said vanadium compound by heating to a temperature of 150.degree.-800.degree. C. to produce said supported catalyst;
- and
- (b) combining said supported catalyst with an organoaluminum cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
2 more elements
A method of producing a catalyst system comprising:
- (a) forming a supported catalyst by
- forming an aluminum phosphate hydrogel by combining a source of phosphate ions with a melt of an aluminum salt and neutralizing,
- converting said hydrogel to a xerogel,
- introducing a vanadium compound by one of coprecipitating with said aluminum phosphate, adding an aqueous solution of a vanadium compound to said hydrogel or adding a non-aqueous of a vanadium compound to said xerogel, and
- activating said xerogel containing said vanadium compound by heating to a temperature of 150.degree.-800.degree. C. to produce said supported catalyst;
- and
- (b) combining said supported catalyst with an organoaluminum cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
4 more elements
A method of producing a catalyst system comprising:
- (a) forming a supported catalyst by treating a silica-containing material with a phosphating agent selected from phosphate ions and vaporized phosphorus compounds so as to give 0.001 to 0.2 gram atoms of phosphorus per mole of silica, incorporating a vanadium compound to produce said supported catalyst, and activating the resulting catalyst at a temperature of 150.degree.-800.degree. C.;
- and
- (b) combining said supported catalyst with an organoaluminum cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
A method of producing a catalyst system comprising:
- (a) forming a supported catalyst by
- forming a silica/phosphate composition containing a vanadium compound, and
- activating said thus-produced vanadium-containing composition by heating at a temperature of 150.degree.-800.degree. C.;
- and
- (b) combining said supported catalyst with an organoaluminum cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
2 more elements
A method of producing a catalyst system comprising:
- (a) forming a supported catalyst by phosphating an alumina-containing composition by treating same with a phosphating agent selected from (1) phosphate ions, and (2) vaporous phosphorus compounds to give a surface composition having a 0.2:1 to 1.8:1 P/Al atom ratio, said composition having a vanadium compound incorporated therein, activating the thus phosphated alumina composition containing said vanadium compound by heating at a temperature within the range of 150.degree.-800.degree. C.;
- and
- (b) combining said supported catalyst with an organometal cocatalyst of the formula R.sub.n AlX.sub.3-n wherein R is a 1 to 12 carbon atom alkyl radical, n is a number between 1 and 2 inclusive, and X is a halogen.
Dependencies are inferred from the claim text.