Hydrogenation catalyst for coal tar, a method of hydrogenation of coal tar with use of such catalyst, and a method of producing super needle coke from the hydrogenation product of coal tar

摘要

Described is a catalyst used for hydrogen treatment of coal tar characterized in that about 10 to 30 weight percent of Mo oxides as first catalyst component and about 1 to 6 weight percent of Ni and/or Co as second catalyst component, both relates to the total catalyst weight, are supported on a porous inorganic substrate consisting essentially of alumina or silica alumina, and in that the mean pore size is about 8 to 18 nm, the pore size distribution is such thatPP ______________________________________ PPpore size nm volume ratio cc/g PP ______________________________________ PP3.5-5 Less than 0.1 PP5-8 Less than 0.3 PP 8-18 0.2-0.2 PP18-30 Less than 0.2 PPover 30 Less than 0.1 PP______________________________________ P PPPand the total pore surface is higher than about 100 m.sup.2 /g. Also described are the method of hydrogen treatment with use of the catalyst, and the method of producing a super needle coke suitable for the preparation of the graphite electrode, which consists in subjecting the hydrogenated oil resulting from such hydrogen treatment to delayed coking.