Catalyst
AssigneeJohnson Matthey PLC
InventorsMartin John Hayes, Chandresh Malde, Michael Ian Petch, Stephen David Pollington, Brian Ronald Charles Theobald
Life of this patent
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Abstract
A catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons comprises at least one first metal and at least one second metal bound to a support material. The at least one first metal comprises at least one transition metal, suitably a platinum group metal. The support material is provided with an overlayer such that acidic sites on the support material are substantially blocked. In a preferred embodiment the catalyst is also substantially chloride free. Method of preparing catalyst are also disclosed.
Claims19
A catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the catalyst consisting essentially of:
- a support material;
- an overlayer disposed on the support material;
- at least one first metal;
- and
- at least one second metal, said first and second metals bound to the overlayer;
- wherein the at least one first metal comprises at least one transition metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, iridium and osmium;
- the at least one second metal selected from the group consisting of tin, germanium, lead, gallium, zinc, antimony and bismuth;
- and wherein the overlayer comprises a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof, such that acidic sites on the support material are substantially blocked.
A catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the catalyst consisting essentially of:
- a support material;
- an overlayer disposed on the support material;
- at least one first metal;
- at least one second metal, wherein said first and second metals are bound to the overlayer;
- and
- a catalyst promoter;
- wherein the at least one first metal comprises at least one transition metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, iridium and osmium;
- the at least one second metal is selected from the group consisting of tin, germanium, lead, gallium, zinc, antimony and bismuth;
- and wherein the overlayer comprises a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof, such that acidic sites on the support material are substantially blocked.
A method of making a catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the method comprising the steps of:
- (a) contacting a support material with a solution of an overlayer precursor;
- (b) drying and calcining the support material to form an overlayer;
- (c) contacting the calcined support material from step (b) with a solution of at least one first metal precursor and at least one second metal precursor;
- and
- (d) drying and calcining the treated support material from step (c) to form the catalyst;
- wherein the overlayer comprises a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof such that acidic sites on the support material are substantially blocked wherein the at least one first metal precursor consists of a salt of platinum, palladium, rhodium, ruthenium, iridium or osmium;
- and the at least one second metal precursor consists of a salt of tin, germanium, lead, gallium, copper, zinc, antimony or bismuth.
A method of making a catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the method comprising the steps of:
- (a) contacting a support material with a solution of at least one first metal precursor and at least one second metal precursor;
- and
- (b) drying and calcining the as treated support material from step (a) to form the catalyst;
- wherein the solution of the at least one first metal precursor and the at least one second metal precursor comprises K2[Pt(C2O4)2] and Sn(BF4)2 in an aqueous solution of citric acid.
A method of hydrogenating a hydrocarbon, the method comprising the step of contacting the hydrocarbon with a hydrogen-containing gas and a catalyst comprising at least one first metal and at least one second metal bound to a support material;
- wherein the at least one first metal comprises at least one transition metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, iridium and osmium;
- the at least one second metal is selected from the group consisting of tin, germanium, lead, gallium, zinc, antimony and bismuth;
- and wherein the support material is provided with an overlayer comprising a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof, such that acidic sites on the support material are substantially blocked.
A method of dehydrogenating a hydrocarbon, the method comprising the step of contacting the hydrocarbon with a catalyst comprising at least one first metal and at least one second metal bound to a support material;
- wherein the at least one first metal comprises at least one transition metal chosen from the group consisting of platinum, palladium, rhodium, ruthenium, iridium and osmium;
- the at least one second metal is chosen from the group consisting of tin, germanium, lead, gallium, zinc, antimony and bismuth;
- and wherein the support material is provided with an overlayer comprising a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof, such that acidic sites on the support material are substantially blocked.
A method of making a catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the method comprising the steps of:
- (a) contacting a support material with a solution of an overlayer precursor;
- (b) drying and calcining the support material to form an overlayer;
- (c) contacting the calcined support material from step (b) with a solution of at least one first metal precursor comprising an anionic carboxylate and at least one second metal precursor;
- and
- (d) drying and calcining the treated support material from step (c) to form the catalyst;
- wherein the overlayer comprises a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof such that acidic sites on the support material are substantially blocked wherein the at least one first metal precursor consists of a salt of platinum, palladium, rhodium, ruthenium, iridium or osmium;
- and the at least one second metal precursor consists of a salt of tin, germanium, lead, gallium, copper, zinc, antimony or bismuth.
A method of making a catalyst suitable for the dehydrogenation and hydrogenation of hydrocarbons, the method comprising the steps of:
- (a) contacting a support material with a solution of an overlayer precursor;
- (b) drying and calcining the support material to form an overlayer;
- (c) contacting the calcined support material from step (b) with a solution of at least one first metal precursor and at least one second metal precursor comprising an anion of BF4−;
- and
- (d) drying and calcining the treated support material from step (c) to form the catalyst;
- wherein the overlayer comprises a layer of tin oxide, germanium oxide, lead oxide, zinc oxide, gallium oxide, lanthanum oxide, barium oxide or any mixture thereof such that acidic sites on the support material are substantially blocked wherein the at least one first metal precursor consists of a salt of platinum, palladium, rhodium, ruthenium, iridium or osmium;
- and the at least one second metal precursor consists of a salt of tin, germanium, lead, gallium, copper, zinc, antimony or bismuth.
Dependencies are inferred from the claim text.