Abstract:
A mixed-solid solution tri-metallic oxide/sulfide catalyst having the formula: M. sub. I O. sub. a S. sub. b. multidot. M. sub. II O. sub. c M. sub. III O. sub. d wherein M. sub. I is vanadium, neodymium, tantalum, chromium, molybdenum, tungsten, and mixtures thereof; O is oxygen; S is sulfur; a is selected from zero and a number up to a positive real number representing the stoichiometric requirement, and b is selected from zero and a number up to a positive real number representing the stoichiometric requirement, provided one of a and b is a positive real number; M. sub. II is titanium, zirconium, hafnium, and mixtures thereof; c is a positive real number up to the stoichiometric requirement; M. sub. III is lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, radium, zinc, cadmium, mercury, scandium, yttrium, lanthanum, actinium, and mixtures thereof; and d is a positive real number up to the stoichiometric requirement; and wherein M. sub. I O. sub. a S. sub. b is mixed in a solid solution of M. sub. II O. sub. c M. sub. III O. sub. d.