Promoted zirconium oxide catalyst support
AssigneeSud-Chemie AG
InventorsAiguo Liu, Todd J. Cole, II, Wayne Turbeville
Life of this patent
Estimating the term…
Abstract
A polyacid-promoted, zirconia catalyst or catalyst support having a high crush strength, surface area and pore volume is described. The polyacid-promoted, zirconia catalyst or catalyst support may be made by combining a zirconium compound with a polyacid/promoter material that includes the group 6 metals (i.e., chromium (Cr), molybdenum (Mo), tungsten (W)), as well as phosphoric acids, sulfuric acids, and polyorganic acids. The zirconyl-promoter precursor may be extruded in the absence of any binder or extrusion aid. The polyacid-promoted, zirconia catalyst or catalyst support is hydrothermally stable in aqueous phase hydrogenation or hydrogenoloysis reactions.
Claims20
A hydrothermally-stable, extruded catalyst or catalyst support comprising a zirconium compound and a polyacid/promoter material, wherein the zirconium compound and polyacid/promoter material are combined to form a zirconyl-promoter precursor having a molar ratio between 2:1 and 20:1;
- the polyacid/promoter material is selected from the group consisting of a polyacid, a polyacid comprising the oxide or acid form of chromium, molybdenum, or tungsten, and combinations thereof;
- and the zirconyl-promoter precursor is extruded in an absence of any binder, extrusion aid or stabilizing agent.
A hydrothermally-stable, extruded catalyst or catalyst support consisting essentially of a zirconium compound and a polyacid/promoter material, wherein the zirconium compound and polyacid/promoter material are combined to form a zirconyl-promoter precursor having a molar ratio between 4:1 and 16:1;
- the polyacid/promoter material comprises the oxide or acid form of chromium;
- and the zirconyl-promoter precursor is extruded in an absence of any binder, extrusion aid or stabilizing agent.
A method of preparing a catalyst or catalyst support consisting essentially of zirconium oxide and a polyacid/promoter material, the method comprising:
- a) providing a polyacid/promoter material selected from the group consisting of a polyacid, a polyacid comprising the oxide or acid form of chromium, molybdenum, or tungsten, phosphoric acid, sulfuric acid, acetic acid, citric acid, and combinations thereof;
- b) providing a zirconium compound;
- c) mixing the polyacid/promoter material with the zirconium compound in an amount that yields a solution having an molar ratio of zirconium to polyacid/promoter material between 2:1 and 20:1;
- d) precipitating a zirconium-promoter precursor by mixing an aqueous basic solution with the zirconium-promoter solution;
- e) filtering and drying the zirconium-promoter precursor;
- f) forming the zirconium-promoter precursor into a shape suitable as a catalyst or catalyst support;
- and
- g) calcining the formed zirconium-promoter precursor to form the finished catalyst or catalyst support.
A method of preparing a catalyst or catalyst support consisting essentially of zirconium oxide and a polyacid/promoter material, the method comprising:
- a) providing a polyacid/promoter material selected from the group consisting of a polyacid, a polyacid comprising the oxide or acid form of chromium, molybdenum, or tungsten, phosphoric acid, sulfuric acid, acetic acid, citric acid, and combinations thereof;
- b) providing a zirconium compound;
- c) precipitating the zirconium compound using an aqueous basic solution and washing the zirconium precipitate;
- d) mixing the zirconium precipitate with the polyacid/promoter material in an amount that yields a zirconium-promoter precursor having an molar ratio of zirconium to polyacid/promoter material between 2:1 and 20:1;
- e) filtering and drying the zirconium-promoter precursor;
- f) forming the zirconium-promoter precursor into a shape suitable as a catalyst or catalyst support;
- and
- g) calcining the formed zirconium-promoter precursor to form the finished catalyst or catalyst support.
Dependencies are inferred from the claim text.