Coal hydrogenation catalyst recycle

Details Coal hydrogenation catalyst recycle Coal hydrogenation catalyst recycle

C - Chemistry, Metallurgy

10

G

196/5.3

C10G 1/06 (2006.01) C10G 1/08 (2006.01)

Patent

CA 1107214

A B S T R A C T The present invention resides in the field of the catalytic hydrogenation of coal. The invention is a process for recovering and recycling a substantial proportion of the catalyst used in the hydrogenation of coal, where the coal is slurried in recycle oil in the presence of the suspended catalyst. The catalyst is of a significantly smaller particle size than the ash particles from the coal, the hydrogenated slurry is separated by gravity concentra- tion, thus concentrating the ash particles in a lower layer and a substantial portion of the finer catalyst particles in the supernatant oil, and at least part of the oil is recycled to the hydrogenation process. The principal advantage is that only small amounts of fresh catalyst must be added to the coal slurry make-up to retain the original catalyst level. 18,293-F

297775

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