초록 ▼

A hydroprocessing process includes a cocurrent flow liquid reaction stage, a countercurrent flow liquid reaction stage and a vapor reaction stage in which feed components are catalytically hydroprocessed by reacting with hydrogen. Both liquid stages both produce a liquid and a vapor effluent, with t

A hydroprocessing process includes a cocurrent flow liquid reaction stage, a countercurrent flow liquid reaction stage and a vapor reaction stage in which feed components are catalytically hydroprocessed by reacting with hydrogen. Both liquid stages both produce a liquid and a vapor effluent, with the cocurrent stage liquid effluent the feed for the countercurrent stage and the countercurrent stage liquid effluent the hydroprocessed product liquid. Both liquid stage vapor effluents are combined and catalytically reacted with hydrogen in a vapor reaction stage, to form a hydroprocessed vapor. This vapor is cooled to condense and recover a portion of the hydroprocessed hydrocarbonaceous vapor components as additional product liquid. The uncondensed vapor is rich in hydrogen and is cleaned up if necessary, to remove contaminants, and then recycled back into the cocurrent stage as hydrogen-containing treat gas. Fresh hydrogen is introduced into the countercurrent stage and the countercurrent stage effluent contains sufficient, and preferably all of the hydrogen for the vapor stage reaction.

대표청구항 ▼

[ What is claimed is:] [1.] A hydroprocessing process which includes two liquid and one vapor reaction stages and which comprises the steps of:(a) reacting a feed comprising a hydrocarbonaceous liquid with hydrogen in a cocurrent flow reaction stage in the presence of a hydroprocessing catalyst to f

[ What is claimed is:] [1.] A hydroprocessing process which includes two liquid and one vapor reaction stages and which comprises the steps of:(a) reacting a feed comprising a hydrocarbonaceous liquid with hydrogen in a cocurrent flow reaction stage in the presence of a hydroprocessing catalyst to form a first stage effluent comprising a mixture of a partially hydroprocessed hydrocarbonaceous liquid and vapor;(b) separating said liquid and vapor effluent;(c) reacting said first stage liquid effluent with hydrogen in the presence of a hydroprocessing catalyst in a countercurrent flow hydroprocessing reaction stage to produce a hydroprocessed hydrocarbonaceous product liquid effluent at the bottom of said stage and a hydrocarbonaceous vapor effluent at the top, and(d) combining both of said vapor effluents and then reacting them with hydrogen in the presence of a hydroprocessing catalyst in a vapor hydroprocessing reaction stage to produce a hydroprocessed hydrocarbonaceous vapor, wherein said vapor stage reaction hydrogen is provided by unreacted hydrogen in at least one or both of said countercurrent or cocurrent stage vapor effluents,(e) condensing at least a portion of said hydroprocessed hydrocarbonaceous vapor produced in said vapor hydroprocessing stage to liquid, and then(f) forming a blend consisting essentially of at least a portion of said condensed hydroprocessed hydrocarbonaceous vapor and said hydroprocessed product liquid.