Abstract Novel hydrogenation catalysts are formed by impregnating a suitable support material with an aqueous solution of a salt of a transition metal; heat-treating the impregnated support at a temperature above 500*F. to form chemical complexes on the surface of the support and to drive off moisture and absorbed oxygen; activating the surface complex by contacting the impregnated support with a soluble organometallic compound wherein the metal constituent is selected from Groups I, II and III of the Periodic Chart of the Elements; treating the activated support material in the presence of hydrogen at a temperature of at least 300*F., and thereafter reacting the hydrogen treated activated support material with hydrogen sulfide. The so-formed novel supported sulfided catalysts are highly active for the hydrogenation of organic feedstocks containing relatively high concentration of sulfur in the feedstocks.
The process of claim 1 wherein said hydrogenation reaction is conducted at a temperature ranging between about 0* and about 1, 000*F.
Claim 2
Dependent Claim
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The process of claim 1 wherein the hydrogenation reaction is conducted at a temperature ranging between about 100* and 500*F. and at a pressure ranging between about 1 and 50 atmospheres.
Claim 3
Dependent Claim
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The process of claim 1 wherein said catalyst is at least partially deactivated as a result of contacting same with said feed in the hydrogenation reaction and where said deactivated catalyst is at least partially reactivated by treatment of same with a stripping gas selected from the group consisting of hydrogen, nitrogen and methane, at a temperature ranging between about 200* and 1,200*F.
Claim 4
Dependent Claim
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The process of claim 4 wherein said stripping gas is hydrogen.
Claim 5
Dependent Claim
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The process of claim 1 wherein said catalyst is at least partially deactivated as a result of contacting same with said feed in the hydrogenation reaction and is at least partially regenerated by oxidizing same with air, resulfiding said oxidized catalyst with H2S and reactivating said oxidized, resulfided catalyst with a trialkyl aluminum compound.
Claim 6
Dependent Claim
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The process of claim 1 wherein said organometallic compound, having the formula QRn, is predominantly covalently bonded.
Claim 7
Dependent Claim
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The process of claim 1 wherein the sulfided catalyst is contacted with a gaseous stream containing hydrogen at a temperature above about 400*F. prior to contacting the sulfided catalyst with the feed.
Claim 8
Dependent Claim
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The process of claim 1 wherein the support is selected from oxides of Groups II, III and IV of the Periodic Chart of the Elements.
Claim 9
Dependent Claim
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The process of claim 1 wherein Q has an atomic number of from 3 to 50 and wherein QRn is a trialkyl aluminum compound.
Claim 10
Dependent Claim
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The process of claim 1 wherein the hydrogen-treated activated supported metal complex is treated with hydrogen sulfide at temperatures in the range of from about 100* to about 800*F.
Claim 11
Dependent Claim
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The process of claim 1 wherein the hydrogen sulfide is contained in a gaseous stream in a concentration ranging from about 0.1 to about 20 percent.