Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1987-11-16
1988-12-27
Wyse, Tom
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210719, 210721, 210737, 210751, 210904, 210912, C02F 170
Patent
active
047939338
ABSTRACT:
A waste treatment method for metal hydroxide electroplating sludges. Metal hydroxide sludges from the treatment of electroplating waste waters are rendered environmentally safe. The sludges are first dewatered and heated to a temperature sufficient to cause the metal hydroxides to convert to metal oxides. Predetermined quantities of silica and soda, or sources thereof, are mixed with the metal oxides. The mixture is further heated to a temperature sufficient to cause fusion of the mixture and form a slag-like composition having the metal oxides in chemical solution. The slag-like composition is then cooled to ambient temperature. The structure of the cooled slag-like composition is predominantly crystalline, having the metal oxides in solid solution in either a precipitate phase or a silicate matrix. The slag-like composition is resistant to corrosion even in an acidic environment.
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Dvorscek John
Rostoker William
Jarnholm Arne R.
Rostoker, Inc.
Wyse Tom
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