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AssigneeExxon Research & Engineering Co.
InventorsTeh C. Ho, Archie R. Young, Allan J. Jacobson, Russell R. Chianelli
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This invention relates to the preparation and use of catalysts useful for hydroprocessing processes, such as hydrotreating, wherein said catalysts are formed by heating, at elevated temperature, in the presence of sulfur and under oxygen-free conditions, a composite of support material and one or more catalyst precursor salts containing a thiometallate anion of Mo, W or mixture thereof and a cation comprising one or more divalent promoter metals at least one of which is iron, wherein said promoter metal or metals are chelated by at least one neutral, nitrogen-containing polydentate ligand, and wherein said additional divalent promoter metal, if any, is selected from the group consisting of Ni, Co, Mn, Zn, Cu and mixture thereof.
As a composition of matter, a supported catalyst obtained by compositing a pre-selected quantity of support material with one or more precursor salts and heating said composite at elevated temperature of at least about 150.degree. C., in the presence of sulfur and under oxygen-free conditions for a time sufficient to form said catalyst, wherein said precursor salt contains a tetrathiometallate anion of Mo, W or mixture thereof and a cation of divalent iron which is chelated by at least one neutral, nitrogen-containing polydentate ligand.
A process for preparing a supported catalyst, said process comprising compositing a pre-selected quantity of support material with one or more precursor salts and heating said composite at elevated temperature of at least about 150.degree. C., in the presence of sulfur and under oxygen-free conditions for a time sufficient to form said catalyst, wherein said precursor salt contains a tetrathiometallate anion of Mo, W or mixture thereof and a cation comprising divalent iron as a promoter metal and wherein said divalent promoter metal is chelated by at least one neutral, nitrogen-containing polydentate ligand.
As a composition of matter, a supported catalyst obtained by compositing a pre-selected quantity of inorganic refractory oxide support material with one or more precursor salts and heating said composite at elevated temperature of at least about 150.degree. C., in the presence of sulfur and under oxygen-free conditions for a time sufficient to form said catalyst, wherein said precursor salt is of the formula (ML)(Mo.sub.y W.sub.1-y S.sub.4) wherein M is divalent iron, wherein y is any value ranging from 0 to 1, and wherein L is one or more neutral, nitrogen-containing ligands, at least one of which is a chelating polydentate ligand.
A process for preparing a supported catalyst, said process comprising compositing a pre-selected quantity of inorganic refractory oxide support material with one or more precursor salts and heating said composite at elevated temperature of at least about 150.degree. C., in the presence of sulfur and under oxygen-free conditions for a time sufficient to form said catalyst, wherein said precursor salt is of the formula (ML)(Mo.sub.y W.sub.1-y S.sub.4) wherein M is divalent iron, wherein y is any value ranging from 0 to 1 and wherein L is one or more neutral, nitrogen-containing ligands, at least one of which is a chelating polydentate ligand.
Dependencies are inferred from the claim text.