Method and apparatus for dehalogenating organic halide through electrolysis

Abstract

An object is to provide a method for completely and fully dehalogenating an organic halide through electrolysis, and an electrolysis apparatus used therefor. One embodiment of the invention is a method wherein, when carrying out dehalogenation by electrolyzing an organic halide or a liquid containing the organic halide, a diaphragm electrolytic cell in which an anode and a cathode are separated is used, and electrolysis is carried out while applying ultrasonic waves using ultrasonic wave generating means and stirring using stirring means, and an electrolytic cell used therefor. Another embodiment of the present invention is a method wherein, when carrying out electrolysis, a hydrogen-absorbing metal or alloy is used as a cathode. In this case also, it is preferable to further use a diaphragm electrolytic cell, and carry out electrolysis using ultrasonic wave generating means and stirring means.

What is claimed is:  
     
         1 - 10 . (canceled)  
     
     
         11 . A method for dehalogenating an organic halide, wherein when carrying out dehalogenation by electrolyzing the organic halide or a liquid containing the organic halide, (1) a diaphragm electrolytic cell in which an anode and a cathode formed from a hydrogen-absorbing metal or alloy, the anode and the cathode being separated by the diaphragm, is used, (2) the organic halide or the liquid containing the organic halide is put into the electrolytic cell on the cathode side, and (3) electrolysis is carried out while applying ultrasonic waves on the cathode side using ultrasonic wave generating means and stirring on the cathode side by stirring means.  
     
     
         12 . The method for dehalogenating an organic halide according to  claim 11 , wherein the organic halide is a PCB or a dioxin.  
     
     
         13 . The method for dehalogenating an organic halide according to  claim 11 , wherein an aqueous solution of a salt is put into the electrolytic cell on the anode side, and electrolysis is carried out.  
     
     
         14 . The method for dehalogenating an organic halide according to  claim 13 , wherein the aqueous solution of a salt is an aqueous solution of a hydroxide or a chloride of an alkali metal or an alkaline earth metal.  
     
     
         15 . A diaphragm electrolytic cell for carrying out dehalogenation by electrolyzing an organic halide or a liquid containing the organic halide, in which an anode and a cathode are separated, wherein the electrolytic cell on the cathode side comprises ultrasonic wave generating means and stirring means, and the cathode is formed from a hydrogen-absorbing metal or alloy.  
     
     
         16 . The diaphragm electrolytic cell according to  claim 15 , wherein the electrolytic cell comprises a cooling means for the electrolytic cell and a refluxing means for a liquid to be treated that has been evaporated.