Catalyst for disproportionation/double-bond isomerization of olefins

Claim 2

An activated calcined homogenous catalyst composition consisting essentially of a support/uranium/and at least one of tungsten and rhenium, wherein said composition contains about 0.1 to 25 weight percent total uranium, tungsten, and rhenium, each calculated as the metal; and a weight ratio of uranium:at least one of tungsten and rhenium of about 2:1 to 0.1:1; and wherein said activated catalyst composition is prepared by steps which comprise forming a homogenous composite, calcining said homogenous composite in a molecular oxygen-containing atmosphere at elevated temperatures, and subsequently activating said calcined homogenous composite under reducing conditions at elevated temperatures.

Claim 3

The catalyst composition according to claim 1 wherein said total of uranium, tungsten, and rhenium is about 1 to 15 weight percent.

Claim 4

The catalyst composition according to claim 2 wherein said ratio of uranium:at least one of tungsten and rhenium is about 2:1 to 0.5:1.

Claim 5

The catalyst composition according to claim 3 wherein said support is alumina, silica, silica-alumina, zirconia, titania, thoria, aluminum phosphate magnesium silicate, zinc aluminate, or mixture.

Claim 6

The catalyst composition according to claim 4 wherein said support is silica.

Claim 7

The catalyst composition according to claim 5 wherein said promoter is tungsten.

Claim 8

The catalyst composition according to claim 5 wherein said promoter is rhenium.

Claim 9

The catalyst composition according to claim 1 activated with hydrogen, nitrogen, or carbon monoxide at elevated temperatures.

Claim 10

A method of preparing the activated catalyst composition of claim 1 which comprises impregnating a said support with at least one aqueous impregnating solution of a water-soluble uranium-containing compound and at least one compound of tungsten or rhenium or both, removing excess solvent from the resulting impregnated support, drying, calcining the dried impregnated support, and activating the calcined impregnated support under a reducing atmosphere at elevated temperature, thereby producing said activated calcined homogenous catalyst.

Claim 11

The process according to claim 9 wherein said calcining is at a temperature of about 500° to 800° C., and said activation with a reducing atmosphere is at a temperature of about 300° to 500° C.

Claim 12

An activated calcined homogenous catalyst composition consisting essentially of a molecular hydrogen or carbon monoxide treated uranium/tungsten, rhenium, or both/support catalyst composition containing about 0.1 to 25 weight percent total of uranium, tungsten, and rhenium, calculated as the metals and based on the total weight of the catalyst composition including support, and a weight ratio of about 2:1 to 0.1:1 uranium:total of tungsten and rhenium, prepared by steps comprising impregnating a solid support with water soluble salts of uranium and at least one salt of at least one of tungsten or rhenium, calcining the resulting impregnated solid support at elevated temperatures in a molecular-oxyen containing atmosphere, and heating the calcined impregnated supported composition with hydrogen or carbon monoxide under reducing conditions at elevated temperatures.

Claim 13

An activated calcined homogenous catalyst composition consisting essentially of a molecular hydrogen or carbon monoxide treated uranium/tungsten, rhenium, or both/support catalyst composition containing about 0.1 to 25 weight percent total of uranium, tungsten, and rhenium, calculated as the metals and based on the total weight of the catalyst composition including support, and a weight ratio of about 2:1 to 0.1:1 uranium:total of tungsten and rhenium, prepared by steps comprising impregnating a solid support with water soluble salts of uranium and at least one salt of at least one of tungsten or rhenium, calcining the resulting impregnated solid support at elevated temperatures in a molecular-oxyen containing atmosphere, and heating the calcined impregnated supported composition with hydrogen or carbon monoxide under reducing conditions at elevated temperatures.

Claim 14

The catalyst composition according to claim 11 wherein said support is alumina, silica, silica-alumina, zirconia, titania, aluminum phosphate thoria, magnesia silicate, zinc aluminate, or mixture.

Claim 15

The catalyst composition according to claim 12 wherein said treatment with said molecular hydrogen or carbon monoxide is conducted at about 300° to 500° C.

Claim 16

The catalyst composition according to claim 13 wherein said support is silica.

Claim 17

The catalyst composition according to claim 14 wherein said catalyst composition is a tungsten promoted/silica supported/uranium activated catalyst composition.

Claim 18

The catalyst composition according to claim 5 containing a weight percent ratio of about 0.464/0.435/10 tungsten/uranium/silica.

Claim 19

The catalyst composition according to claim 11 wherein said hydrogen or carbon monoxide is hydrogen.

Claim 20

The catalyst composition according to claim 11 wherein said hydrogen or carbon monoxide is carbon monoxide.