Catalyst composition and processes therefor and therewith

A process consisting essentially of:

• (1) contacting a zeolite with (a) a metal compound and (b) an activity modifier precursor thereby incorporating said metal compound and said activity modifier precursor into said zeolite and (2) treating said modified zeolite with steam at a temperature in the range of about 120.degree. C. to about 1500.degree. C. for a time of at least 5 minutes sufficient to effect the conversion of at least a portion of said metal compound and said activity modifier precursor to the corresponding oxide wherein the metal of said metal compound is selected from the group consisting of chromium, cobalt, molybdenum, nickel, rhodium, palladium, platinum, tungsten, and combinations of any two or more thereof and wherein said activity modifier precursor is selected from the group consisting of silicon-containing compounds, sulfur-containing compounds, phosphorus-containing compounds, boron-containing compounds, magnesium-containing compounds, tin-containing compounds, titanium-containing compounds, zirconium-containing compounds, germanium-containing compounds, indium-containing compounds, lanthanum-containing compounds, cesium-containing compounds, and combinations of any two or more thereof.