Abstract A novel bimetallic catalyst especially useful for the low temperature reduction of oxysulfur compounds with hydrogen, is disclosed. The bimetallic catalyst is a combination of catalytically effective amounts of molybdenum sulfide and of cobalt sulfide with a porous carrier material. It is prepared by impregnating the carrier material with a first metallic component drying and sulfiding to form a sulfided monometallic composite, purging free sulfide from contact with same, impregnating the resulting composite with the second metallic component to form a bimetallic composite, and thereafter, drying and sulfiding the resulting bimetallic composite to produce the bimetallic catalyst. The resulting bimetallic catalyst is especially useful in a method for reducing an inorganic, water-soluble oxysulfur compound wherein an aqueous solution of the oxysulfur compound and hydrogen are contacted with the bimetallic catalyst at reduction conditions.
A catalyst as defined in claim 1 wherein said Porous carrier material is a carbonaceous material.
Claim 2
Dependent Claim
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A catalyst as defined in claim 2 wherein said carbonaceous material is activated carbon.
Claim 3
Dependent Claim
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A catalyst as defined in claim 2 wherein said carbonaceous material is high surface area coke.
Claim 4
Dependent Claim
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A catalyst as defined in claim 2 wherein said carbonaceous carrier material is charcoal.
Claim 5
Dependent Claim
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A catalyst as defined in claim 1 wherein said porous carrier material is a refractory inorganic oxide.
Claim 6
Dependent Claim
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A catalyst as defined in claim 6 wherein said refractory inorganic oxide is alumina.
Claim 7
Dependent Claim
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A catalyst as defined in claim 1 wherein said sulfide-yielding compound utilized in steps (c) and (g) is hydrogen sulfide.
Claim 8
Dependent Claim
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A catalyst as defined in claim 1 wherein steps (c) and (g) are both performed by lowering the pressure in a vessel containing the composite to a pressure substantially below atmospheric pressure and thereafter using a hydrogen sulfide-containing gas to raise the pressure of said vessel to at least atmospheric pressure.
Claim 9
Dependent Claim
41 words
A catalyst as defined in claim 1 wherein the amounts of the cobalt sulfide component and the molybdenum sulfide component are selected to result in a catalyst possessing an atomic ratio of cobalt to molybdenum of about 0.25:1 to about 5:1.