Method for separating and recovering an acid

Details Method for separating and recovering an acid Method for separating and recovering an acid

1992-06-05

1994-04-05

Spear, Frank

Liquid purification or separation

Processes

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

210644, B01D 6124

Patent

active

053002288

ABSTRACT:
A method for separating and recovering an acid, which comprises contacting to one side of a diffusion dialysis membrane an acid solution containing an acid having an acid radical with a formula weight of at most 200 and impurities and to the other side of the membrane water or a dilute acid solution, to separate and recover the acid in the solution, wherein the diffusion dialysis membrane comprises a cation exchange membrane having certain specific properties or comprises a main layer of an anion exchanger and a surface layer of the cation exchange membrane having certain specific properties formed on the main layer at the side of which is contact with the acid solution.

REFERENCES:
patent: 4476025 (1984-10-01), Chum et al.
patent: 4765905 (1988-08-01), Kitamura et al.
Patent Abstracts of Japan, vol. 5, No. 8, (C-39), Jan. 20, 1981, & JP-A-55 137 008, Oct. 25, 1980, Kurokawa Fumio, et al., "Diffusion Dialysis".

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