Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1993-06-11
1994-02-22
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204149, 210748, C02F 1461
Patent
active
052883736
ABSTRACT:
A process for removing cyanide from liquid waste by electrolysis is disclosed. The method includes combining waste water and NaCl to an electrolyser cell, the cell having positive and negative electrode plates. The NaCl concentration in the cell is maintained at about 180 g/l. HCl and NaOH are added to maintain the pH at about 10.5. The liquids are agitated, and a current is applied to the electrode plates. The cyanide is decomposed, and the heavy metals are separated out. The waste gasses are sent through a purifying tower where CO.sub.2 and N.sub.2 are released. A decyanation apparatus comprising an electrolyser and a gas purifier is also disclosed.
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Metalloberflache, "Entgiftung von Zyanidabwassern aus Galvanisierungswerkstatten mit Hilfe der kontinuierlichen elektrolytischen Chlorierung", Eigenschaften et al., vol. 8, pp. 225-231, 1969.
Galvanotechnik, "Entgiftung cyanidischer Abwasser", Knorre, vol. 66, No. 5, pp. 374-383, 1975.
Niebling John
Phasge Arun S,.
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