Hazardous or toxic waste destruction or containment – Processes for making harmful chemical substances harmless,... – By reacting with chemical agents
Reexamination Certificate
2007-08-07
2007-08-07
Johnson, Edward M. (Department: 1754)
Hazardous or toxic waste destruction or containment
Processes for making harmful chemical substances harmless,...
By reacting with chemical agents
Reexamination Certificate
active
10494707
ABSTRACT:
A highly reliable detoxifying method of the cyano matters is provided. The waste-liquor, which contains at least one of free cyano material, a cyano complex and a reducing compound exhibiting volatility in alkaline aqueous solution, is heated under an alkaline condition to a temperature range, which lies within a range of from room temperature to the boiling point, and which includes a high temperature range of 80° C. or more, followed by holding the temperature; oxidation-reduction potential of the waste liquor is measured from the room temperature; and, hypochlorite is intermittently or continuously added to the waste liquor from the room temperature, until the oxidation-reduction of the hypochlorite is detected.
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Patent Abstracts of Japan, vol. 2002, No. 02, Apr. 2, 2002.
Kojima Ryuji
Nakamura Humihide
Totsuka Toshiko
Yashiro Kuniji
Yoneyama Yoshiyasu
Johnson Edward M.
Nihon Parkerizing Co. Ltd.
Parker Netsushorikogyo K.K.
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