Patent ID: 6284807
Filing Date: 2001-09-04
Classification: B01D,C01B,C10G,C10K

Abstract:
A slurry hydrocarbon synthesis process, with reduced rejuvenation hydrogen consumption, for making hydrocarbons from a synthesis gas comprising a mixture of H.sub.2 and CO which also contains HCN, NH.sub.3 or mixture thereof, said process comprising passing said synthesis gas into a slurry hydrocarbon synthesis reactor and reacting said H.sub.2 and CO in the presence of a hydrocarbon synthesis catalyst in a slurry comprising said catalyst and gas bubbles in a hydrocarbon slurry liquid, under reaction conditions effective to form hydrocarbons from said H.sub.2 and CO, at least a portion of which are liquid at said reaction conditions and comprise said slurry liquid, wherein said HCN, NH.sub.3 or mixture thereof reversibly deactivates said catalyst and causes it to lose a portion of its catalytic activity, and wherein at least a portion of said lost catalytic activity is restored by contact with hydrogen in-situ in said slurry liquid, said catalyst comprising a catalytically active metal component and a particulate inorganic refractory oxide support component, and wherein the total amount of said HCN, NH.sub.3 or mixture thereof present in said synthesis gas passed into said reactor is less than 20 vppb, to achieve a reversibly deactivated short term catalyst half life of at least 20 days.