Filter device for acids and process for filtering inorganic acid

Details Filter device for acids and process for filtering inorganic acid Filter device for acids and process for filtering inorganic acid

1992-06-10

1994-01-04

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210650, 210654, 21050042, 210490, 2103216, 264 49, 264 48, B01D 6100

Patent

active

052757382

ABSTRACT:
A PVDF membrane exposed to a quarternary ammonium hydroxide solution retains it hydrophobicity and resistance to corrosive environments, yet spontaneously and completely wets with concentrated sulfuric and nitric acids. The modified membrane is incorporated into filtration devices that are in situ integrity testable in concentrated inorganic mineral acids.

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