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:
Jan. 10, 2012
Filed:
Jul. 11, 2008
Mitsuo Abumiya, Tokyo, JP;
Yusuke Sato, Akira, JP;
Hironobu Mikami, Akita, JP;
Masami Oouchi, Tokyo, JP;
Tetsuo Fujita, Tokyo, JP;
Masayoshi Matsumoto, Tokyo, JP;
Mitsuo Abumiya, Tokyo, JP;
Yusuke Sato, Akira, JP;
Hironobu Mikami, Akita, JP;
Masami Oouchi, Tokyo, JP;
Tetsuo Fujita, Tokyo, JP;
Masayoshi Matsumoto, Tokyo, JP;
Dowa Metals and Mining Co., Ltd., Tokyo, JP;
Abstract
To extract arsenic from intermediates containing arsenic, to outside the system in stable form. A method of processing non-ferrous smelting intermediate containing arsenic in sulfide form and a non-ferrous smelting intermediate containing arsenic and copper as metal; a solution adjusting step of adding an oxidation agent to the leaching solution to oxidize trivalent arsenic to pentavalent arsenic and obtain an adjusting solution; and a crystallization step of converting arsenic in the adjusted solution to scorodite crystals.