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US 5,264,123 AGranted
Acid recycling system
OwnerDaniel E. Baileyinventor
Life of this patent
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Abstract
A system for removing acid from a metal-rich acid stream by diffusion dialysis. The acid stream is contacted with a water stream through an ion exchange membrane, in a series, counter-current flow contactor. The contactor is formed of a stack of layers of ion exchange membranes and impervious separators with flow-control apertures. The stack includes switch-back spacers which cause the flow to switch direction.
Claims1
A system for removing acid from a metal-rich acid stream by diffusion dialysis, in which:
- (a) the acid stream is contacted with a water stream through an ion exchange membrane, in a series, counter current flow contactor,
- (b) the contactor is formed of a stack of layers of ion exchange membrane and impervious separators with flow-control apertures, and
- (c) the stack includes switch-back spacers which cause the flow to switch direction, without external plumbing said spacers having a first end and a second end, and having pass-through appertures at said first end and an apperture blocking zone at said second end, adapated to block flow through said second end.
Dependencies are inferred from the claim text.