초록 ▼

A catalyst composition and a process for hydrodealkylating a C.sub.9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C.sub.6 to C.sub.8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises a zeolite, a metal oxide, and an activity modifier selected fro

A catalyst composition and a process for hydrodealkylating a C.sub.9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C.sub.6 to C.sub.8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises a zeolite, a metal oxide, and an activity modifier selected from the group consisting of silicon oxides, sulfur oxides, phosphorus oxides, boron oxides, magnesium oxides, tin oxides, titanium oxides, zirconium oxides, germanium oxides, indium oxides, lanthanum oxides, cesium oxides, and combinations of any two or more thereof. The process comprises contacting a fluid which comprises a C.sub.9 + aromatic compound with the catalyst composition under a condition sufficient to effect the conversion of a C.sub.9 + aromatic compound to a C.sub.6 to C.sub.8 aromatic hydrocarbon.

대표청구항 ▼

[ That which is claimed:] [1.] 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 s

[ That which is claimed:] [1.] 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.