초록 ▼

Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals, which catalysts in addition contain a nanocrystalline phase of alumina of a crystallite size at the surface of less than 25 .ANG.. Also provided are processes

Provided are high activity catalysts based upon gamma alumina containing substrates impregnated with one or more catalytically active metals, which catalysts in addition contain a nanocrystalline phase of alumina of a crystallite size at the surface of less than 25 .ANG.. Also provided are processes for preparing such high activity catalysts and various uses thereof.

대표청구항 ▼

[ We claim:] [1.] A catalyst composition comprising a particulate porous support containing gamma alumina, having a surface area of at least 100 square meters per gram, as measured by nitrogen adsorption, and a pore volume of at least 0.25 cubic centimeters per gram, as measured by mercury porosimet

[ We claim:] [1.] A catalyst composition comprising a particulate porous support containing gamma alumina, having a surface area of at least 100 square meters per gram, as measured by nitrogen adsorption, and a pore volume of at least 0.25 cubic centimeters per gram, as measured by mercury porosimetry, and impregnated with one or more catalytically active metals, characterized in that the catalyst contains a nanocrystalline phase of alumina of a crystallite size at the surface of from 8 .ANG. to 25 .ANG. in combination with the gamma alumina which has a crystallite size at the surface of the catalyst of greater than 30 .ANG.; and that the catalyst possesses an at least bimodal mesopore structure. [19.] A process for the catalytic hydrodesulfurization of a hydrocarbon-containing feed comprising the step of contacting the feed under hydrodesulfurization conditions with a catalyst composition comprising a particulate porous support containing gamma alumina, having a surface area of at least 100 square meters per gram, as measured by nitrogen adsorption, and a pore volume of at least 0.25 cubic centimeters per gram, as measured by mercury porosimetry, and impregnated with one or more catalytically active metals for hydrodesulfurization, characterized in that the catalyst contains a nanocrystalline phase of alumina of a crystallite size at the surface of from 8 .ANG. to 25 .ANG. in combination with the gamma alumina which has a crystallite size at the surface of the catalyst of greater than 30 .ANG.; and that the catalyst possesses an at least bimodal mesopore structure. [79.] A process for the catalytic hydrocracking of a hydrocarbon-containing feed comprising the step of contacting the feed under hydrocracking conditions with a catalyst composition comprising a particulate porous support containing gamma alumina, having a surface area of at least 100 square meters per gram, as measured by nitrogen adsorption, and a pore volume of at least 0.25 cubic centimeters per gram, as measured by mercury porosimetry, and impregnated with one or more catalytically active metals for hydrocracking, characterized in that the catalyst contains a nanocrystalline phase of alumina of a crystallite size at the surface of from 8 .ANG. to 25 .ANG. in combination with the gamma alumina which has a crystallite size at the surface of the catalyst of greater than 30 .ANG.; and that the catalyst possesses an at least bimodal mesopore structure.