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. 08, 1986
Filed:
Apr. 04, 1984
Saburo Hayashi, Kakogawa, JP;
Mitsukazu Mukai, Kakogawa, JP;
Masahiro Inoue, Hyogo, JP;
Hiroo Tsuchiya, Kakogawa, JP;
Akira Otsuji, Hyogo, JP;
Takeo Tanabe, Nara, JP;
Seitetsu Kagaku Co., Ltd., Miyanishi, JP;
Abstract
A process for the removal and recovery of mercury and, if desired, other heavy metals from incinerator waste water produced by washing waste gases from incinerators, which comprises adding to the waste water a reducing agent or a combination of oxidizing and reducing agents, subjecting the thus added waste water to stripping treatment in the presence of ferrous ion to obtain a mercury vapor-containing gas and simultaneously form spinel type crystalline compounds and then cooling said gas to separate and recover the mercury. If desired, said spinel type crystalline compounds are also removed from the mercury-free waste water.