Recovering free organic acids from solutions in which they occur

Details Recovering free organic acids from solutions in which they occur Recovering free organic acids from solutions in which they occur

1986-07-21

1988-11-01

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041826, 204186, 204301, 204302, 426239, B01D 1302

Patent

active

047818093

ABSTRACT:
Processes and apparatus are disclosed for recovering free organic acids from aqueous solutions in which they occur at least in part as free acid together with other organic matter comprising:
(a) passing said solution through a de-acidifying chamber (compartment, cell, space) in an electrodialysis ("ED") apparatus, said de-acidifying chamber defined on each face thereof by membranes substantially permeable to anions, said membranes separated from each other by turbulence promoting spacers, such ED apparatus also comprising an organic acid receiving chamber juxtaposed to one face of said de-acidifying chamber;
(b) passing a direct electric current (which may include alternating current components) through said ED apparatus in a direction to cause anions of said organic acid and hydronium cations to migrate into said organic acid receiving chamber; and
(c) recovering from said organic acid receiving chamber a solution comprising free organic acid.

REFERENCES:
patent: 3165415 (1960-10-01), Kilburn et al.
patent: 3654125 (1968-08-01), Leitz
patent: 3878086 (1975-04-01), Haswell et al.
patent: 4024043 (1977-05-01), Dege et al.
patent: 4057483 (1977-11-01), Giuffrida
patent: 4110175 (1978-08-01), Ahlgren et al.
patent: 4632745 (1986-12-01), Giuffrida et al.

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