The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2007
Filed:
Nov. 07, 2002
Ryuji Kojima, Tokyo, JP;
Humihide Nakamura, Tokyo, JP;
Yoshiyasu Yoneyama, Tokyo, JP;
Kuniji Yashiro, Kanagawa, JP;
Toshiko Totsuka, Kanagawa, JP;
Ryuji Kojima, Tokyo, JP;
Humihide Nakamura, Tokyo, JP;
Yoshiyasu Yoneyama, Tokyo, JP;
Kuniji Yashiro, Kanagawa, JP;
Toshiko Totsuka, Kanagawa, JP;
Nihon Parkerizing Co., Ltd., Tokyo, JP;
Parker Netsushorikogyo K.K., Tokyo, JP;
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.