초록

The process according to the invention is particularly suitable for preparing ebullated bed catalysts from spent hydroprocessing catalysts.

대표청구항 ▼

[ I claim:] [1.] A process for preparing a hydroprocessing catalyst which comprises(a) subjecting a spent hydroprocessing catalyst comprising at least a hydrogenation metal component on a support comprising at least 50 wt. % of alumina and carbonaceous and sulphurous deposits is subjected to a therm

[ I claim:] [1.] A process for preparing a hydroprocessing catalyst which comprises(a) subjecting a spent hydroprocessing catalyst comprising at least a hydrogenation metal component on a support comprising at least 50 wt. % of alumina and carbonaceous and sulphurous deposits is subjected to a thermal treatment at a temperature in the range of 200.degree. to 600.degree. C. in an oxidising atmosphere to remove at least part of the carbonaceous and sulphurous deposits from the catalyst,(b) grinding the hydroprocessing catalyst from which at least part of the carbonaceous and sulphurous deposits have been removed form particles with a particle size of 300 microns or less,(c) mixing the ground hydroprocessing catalyst with at least one additive, and(d) shaping the mixture of additive and ground hydroprocessing catalyst to form particles of a new hydroprocessing catalyst, wherein the product of at least one of the steps (a) through (d) is subjected to a high-temperature calcination step carried out at a temperature in the range of 550-1000.degree. C. for a period of time sufficient to increase the MPD of the spent catalyst by at least 0.5 nm.