| 摘要 |
Solid particles of a catalyst, particularly Raney nickel, are recovered from a catalytic reaction product, particularly a hydrogenation reaction product, by passing the product containing the catalyst through a hollow tubular filter medium which comprises a nonwoven web of fibers, has a tapered pore distribution such that the pore size of the filter medium decreases in the direction of normal fluid flow, and is backwashable when clogged to enable its re-use. The catalyst content of the product may be reduced to 2ppm. Catalyst particles may be as small as 3 microns diameter, and Raney nickel is preferred.
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