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:
Nov. 01, 2011
Filed:
Oct. 16, 2006
Masayoshi Konishi, Narashino, JP;
Hideho Hayashi, Tokyo, JP;
Ikuko Watanabe, Ichikawa, JP;
Takehiko Itoh, Sanbu-gun, JP;
Takayuki Kuroiwa, Narashino, JP;
Taichiro Fujimaki, Matsudo, JP;
Masayoshi Konishi, Narashino, JP;
Hideho Hayashi, Tokyo, JP;
Ikuko Watanabe, Ichikawa, JP;
Takehiko Itoh, Sanbu-gun, JP;
Takayuki Kuroiwa, Narashino, JP;
Taichiro Fujimaki, Matsudo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Japan Water Systems Corporation, Tokyo, JP;
Abstract
The present invention provides a method and an apparatus for treating a chlorine-containing waste, which can separate and recover a chlorine component from a chlorine-containing waste, and also can achieve a high chlorine removal thereby obtaining a high purity chlorine compound, and can decrease the amount of water for recovering chlorine. The method for treating a chlorine-containing waste of the present invention comprises a washing/filtrating step of adding water to the chlorine-containing waste, followed by mixing to form a first slurry, separating the first slurry into a solid and a filtrate through filtration, and using the resulting solid as a cement raw material; a filtrate treating step of adding a reducing agent and a pH adjustor to the filtrate to form a sediment containing heavy metal and calcium contained in the filtrate, and separating the sediment through filtration; a crystallization step of concentrating the filtrate, from which the sediment has been removed, through heating and evaporation to form a second slurry in which a chlorine compound contained in the filtrate has been crystallized, separating the second slurry into a solid containing a chlorine compound and a mother liquor, and recovering the solid; and a separated mother liquor treating step of returning a portion of the mother liquor to a cement manufacturing facility.