Method of removing catalyst
AssigneePall Corporation
InventorsMatthew Raskin, James R. Gallagher
Life of this patent
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Abstract
A method of removing a catalyst, particularly Raney nickel, from a catalytic reaction product, particularly a hydrogenation reaction product, by passing the catalytic reaction product containing the solid 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.
Claims25
A method of removing a catalyst from a liquid catalytic reaction product, wherein said catalyst has a mean particle diameter of about 20 microns or less, which method comprises (a) passing a liquid catalytic reaction product containing a solid 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, (b) backwashing said filter medium, and (c) repeating steps (a) and (b) at least about 50 times.
A method of removing a catalyst from a liquid catalytic reaction product, which method comprises (a) passing a liquid hydrogenation reaction product containing Raney nickel catalyst having a mean particle diameter of about 3 microns or less through a hollow cylindrical 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, has a 99.98% removal efficiency at about 10 microns or less, and is backwashable, (b) backwashing said filter medium, and (c) repeating steps (a) and (b) at least about 50 times.
Dependencies are inferred from the claim text.