초록 ▼

This invention relates to a process for preparing highly active hydrotreating catalysts prepared by incorporating cobalt and an element selected from the group consisting of molybdenum, tungsten and mixtures thereof, into an alumina hydrogel support. The final calcined catalysts have surface areas g

This invention relates to a process for preparing highly active hydrotreating catalysts prepared by incorporating cobalt and an element selected from the group consisting of molybdenum, tungsten and mixtures thereof, into an alumina hydrogel support. The final calcined catalysts have surface areas greater than about 300 m2/g, flat plate crush strengths greater than about 14 lbs and more than about 80% of their pore volume in pores having diameters less than about 70 Å.

대표청구항 ▼

A process for preparing highly active hydrotreating catalysts having surface areas above about 300 m2/g and at least about 80% of the pore volume in pores having less than about 70 Å, which process comprises: (a) precipitating an aqueous solution of one or more aluminum salt(s) by adjusting the pH t

A process for preparing highly active hydrotreating catalysts having surface areas above about 300 m2/g and at least about 80% of the pore volume in pores having less than about 70 Å, which process comprises: (a) precipitating an aqueous solution of one or more aluminum salt(s) by adjusting the pH to a range between about 5.5 and about 10.0 at a temperature in the range between about 20°C. and about 90°C., (b) aging the precipitate at a temperature ranging from about 20°C. to about 90°C. for at least about 15 minutes at a pH ranging from about 8.0 to about 12.0, (c) washing the precipitate, (d) mixing the precipitate with dry, water-soluble salts of cobalt and a heavy metal selected from the group consisting of molybdenum, tungsten and mixtures thereof, at a pH in the range between about 4.0 and about 8.0 and a temperature in the range between about 25°C. and about 100°C. to yield a final catalyst having from about 1% w to about 5% w cobalt and from about 8% w to about 32% w heavy metal, (e) extruding the product of step (d), and (f) drying and calcining the product of step (e) at a temperature ranging from about 300°C. to about 900°C.