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:
Jul. 24, 2001
Filed:
Nov. 17, 1999
Ryozo Ushio, Ichikawa, JP;
Naoko Kikuta, Ichikawa, JP;
Koji Sasaki, Ichikawa, JP;
Yuji Imaizumi, Niihama, JP;
Ryoichi Nakayama, Niihama, JP;
Iichi Nakamura, Niihama, JP;
Takao Suzuki, Tokyo, JP;
Masayuki Hisatsune, Tokyo, JP;
Sumitomo Metal Mining, Co., Ltd., Tokyo, JP;
Abstract
A method is provided for decomposing free cyanide ion and metallic cyano complex ions in a liquid, comprising the steps of bringing the liquid into contact with ozone gas in a counterflow relation in the condition that the pH of the liquid is at least 10 with the mass flow rate of the ozone in the ozone gas up to 20 mg per minute per liter of liquid, and then bringing the liquid into contact in a counterflow relation with ozone gas having an ozone concentration of at least 150 g/m,in the condition that the pH of the liquid is 7.0 to 9.5.