Method of purifying the raw brine used in alkali salt electrolys

Details Method of purifying the raw brine used in alkali salt electrolys Method of purifying the raw brine used in alkali salt electrolys

1975-12-10

1977-11-29

Bascomb, Jr., Wilbur L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 99, 210 26, 210 27, 210 38A, C25B 100, C25B 126

Patent

active

040604659

ABSTRACT:
A method of purifying the raw brine used in the electrolysis of the aqueous NaCl or KCl solution by removing the Mg and Ca ions from said brine, which comprises contacting said brine with a member selected from the group consisting of
A. the chelate-forming water-insoluble resins capable of forming an intramolecular complex with the Mg and Ca ions said resins being selected from the class consisting of the styrene-butadiene copolymer resins containing the group .ltoreq.N--CH.sub.2 COOH, the epichlorohydrin polymer resins containing the group >N--CH.sub.2 COOH, the N-phenyl glycine-glycidyl methacrylate copolymer resins containing the group >N--CH.sub.2 COOH and the styrene-divinylbenzene copolymer resins containing the group >N--CH.sub.2 COOH; and
B. the water-insoluble adsorbent solids adsorptively supporting a chelate-forming compound selected from the group consisting of the aminoacetic acids containing at least one >N--CH.sub.2 COOH in their molecular structure and the oligomers and the alkali metal salts thereof.

REFERENCES:
patent: 2340110 (1974-01-01), D'Alelio
patent: 2980607 (1961-04-01), Mock et al.
patent: 3551309 (1970-12-01), Dunn et al.
patent: 3645997 (1972-02-01), D'Alelio
patent: 3816356 (1974-06-01), Grannen et al.
Fradkin et al., "Removing the Hardness from Brackish Waters", Chemical Abstract #72:6167t, 1970.

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