Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2006-10-16
2011-11-01
Hruskoci, Peter A (Department: 1778)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C106S762000, C210S712000, C210S719000, C210S725000, C210S737000, C210S772000, C210S774000, C210S912000, C588S415000
Reexamination Certificate
active
08048314
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.
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Fujimaki Taichiro
Hayashi Hideho
Itoh Takehiko
Konishi Masayoshi
Kuroiwa Takayuki
Hruskoci Peter A
Japan Water Systems Corporation
Merchant & Gould P.C.
Sumitomo Osaka Cement Co. Ltd.
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