Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1987-01-02
1987-12-15
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204301, 204151, 204DIG13, B01D 1302, C02F 146
Patent
active
047131560
ABSTRACT:
A process and apparatus for regulating an electrodialyzer having a stack of ion-exchange membranes (2, 3) immersed in an electric field, and including sampling the dilute solution at the discharge (6), measuring in a cell (12) the content of a predetermined ion substance of this sample, in particular the content of free cyanide, and driving by means of a processing unit (14) a pump (15) as a function of that content so as to add a solution containing the ion substances (free cyanides) in an amount inversely related to the measured content at the intake (5) of the electrodialyzer, thereby eliminating electrodialyzer shutdown and membrane clogging.
REFERENCES:
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patent: 4179348 (1979-12-01), Bernat
patent: 4210530 (1980-07-01), Etzel et al.
patent: 4652351 (1987-03-01), Vaughan
Bodamer, George W., "Electrodialysis for Closed Loop Control of Cyanide Rinse Waters", U.S., NTIS, PB Rep., PB-272688, (1977).
Shiio, Hazime and Yamasuchi, Masami, "Use of Ion Exchange Membranes for Recovering Electroplating Zinc Cyanide Baths", Nogoya-Shi Kogyo Kenkyusho Kenkyu Hokoku, 54, 9-12, (1975).
Ozerov, A. I. et al., "Automatic Monitoring of Copper Cyanide in Waste Water During Ion Exchange and Electrodialysis Purification", Primenonie Sorbentov v Bsvet. Metallurgii, 173-177 from: Ref. Zh., Metall, 1974, Abstr. No. 11G405, (1973).
Shivrin, G. N. et al., "Electrodialysis of Industrial Cyanide Solutions and Slurries", Tsvet. Metal., 43(1), 89-93, (1970).
Hasegawa, Isao et al., "Electrodialytic Concentration of Cyano Complexes of Copper (I) in Waste Water from Copper Plating Bath by Electrolytic Cell with Ion Exchange Membranes", Kinzoku Hyomen Gijutsu, 33 (4), 408-413, (1982).
Tuwiner, S. B., "Zero Discharge of Cyanide Copper/Zinc Plating Solutions by the TU-WIN Process", Proc. Natl. Conf. Complete Water Reuse, 2nd, Meeting Date 1975, 276-281, (1976).
Chiapello Jean-Michel
Gal Jean-Yves
Peyrot Martial
Tourneux Etienne
Dutton, Jr. Harold H.
Niebling John F.
Starsiak Jr. John S.
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