Patent ID: 6447673
Filing Date: 2002-09-10
Classification: C10G

Abstract:
A multistage hydrofining process comprising:a. supplying a sulfur- and hydrocarbon-containing processing stream to a multistage hydrotreating reactor; b. within said reactor passing said processing stream into contact with an initial catalyst stage comprising a cobalt molybdenum desulfurization catalyst; c. thereafter passing said processing stream through an intervening sector of said hydrotreating reactor separating said initial catalyst stage from the hereinafter recited subsequent catalyst stage, said intervening sector containing an inert particulate refractory material; d. thereafter passing said processing through a subsequent catalyst stage comprising a cobalt molybdenum hydrocracking catalyst, wherein said cobalt molybdenum catalyst in initial catalyst stage comprises from 10-40 wt. % of the composite of the catalysts in said initial and said subsequent catalyst stages and the cobalt molybdenum catalyst in the subsequent catalyst stage comprises from 60-90% of the composite of said cobalt molybdenum desulfurization catalyst and said cobalt molybdenum catalyst; and e. withdrawing an effluent stream having a reduced sulfur content from said hydrotreating reactor.