Method for separation of electrolytes, and method for ion exchan

Details Method for separation of electrolytes, and method for ion exchan Method for separation of electrolytes, and method for ion exchan

1988-07-18

1991-05-14

Cintins, Ivars

Liquid purification or separation

Processes

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

E01D 6102

Patent

active

050153862

ABSTRACT:
A method for separating electrolytes which have different charges of the same sign or of carrying out ion exchange of electrolytes with counterions, which comprises causing the electrolytes (anion or cation) to pass through a positively or negatively charged loose reverse-osmotic membrane, in an aqueous solution.

REFERENCES:
patent: 4659474 (1987-04-01), Perry et al.
Freeman, Scott D. N. et al., "Comparison of Two Thin-Film Composite Membranes: Low Pressure FT-30 to Very Low Pressure NF40HF", Desalination 62 (1987) pp. 183-191.
Chemical Abstracts, vol. 103, No. 12, Sep. 23, 1985, Columbus, Ohio, U.S.A., p. 365, abstract No. 93439h; K. Koyama et al.: "Separation of inorganic ions by charged reverse osmosis membranes"; & Maku 1984, 9(5), 281-4 (Japan).
Journal Water Pollution Control Federation, vol. 51, No. 1, Jan. 1979, pp. 176-186; D. Bhattacharyya et al.: "Charged membrane ultrafiltration of heavy metals from nonferrous metal" p. 179, lines 9-18.
Journal of Chemical Engineering of Japan, vol. 15, No. 5, 1983, Tokyo, pp. 394-399; I. Jitsuhara et al.: "Rejection of inorganic salts by charged ultrafiltration membranes made of sulfonated polyfulfone".
CZ-Chemie-Technik, 2. Jahrgang (1973), No. 6, Heidelberg, pp. 245-253; K. Marquardt: "Umgekehrte Osmose und Ultrafiltration -Amwendungsmoeglichkeiten und Beschraenkungen des Verfahrens sowie der gegenwaertige Trend im Anlagenbau" p. 249, table 1, lines 32-36.

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