Method for oxidizing manganese species in a treatment device

Abstract

The present invention relates to a method for oxidizing manganese species in a treatment device, the method including the steps(A) providing in the treatment device a manganese species having a first oxidation number,(B) providing in the treatment device one or more than one anode and at least one cathode,(C) applying a current to said anode and said cathode such that at least a portion of the manganese species having the first oxidation number is anodically oxidized to a manganese species having a second oxidation number which is higher than the first oxidation number,characterized in that at least one of said one or more than one anode has a surface density of 6 m2/L or more, based on the total volume of said at least one anode.

1 . A method for oxidizing manganese species in a treatment device, the method comprising the steps
 (A) providing in the treatment device a manganese species having a first oxidation number,   (B) providing in the treatment device one or more than one anode and at least one cathode,   (C) applying a current to said anode and said cathode such that at least a portion of the manganese species having the first oxidation number is anodically oxidized to a manganese species having a second oxidation number which is higher than the first oxidation number,   characterized in that at least one of said one or more than one anode has a surface density of 6 m 2 /L or more, based on the total volume of said at least one anode.   
     
     
         2 . The method of  claim 1 , wherein the first oxidation number is +4 or below. 
     
     
         3 . The method of  claim 1 , wherein the second oxidation number is above +4, preferably is +7. 
     
     
         4 . The method of  claim 1 , wherein the one or more than one anode and the at least one cathode have a distance to each other ranging from 1 mm to 100 mm. 
     
     
         5 . The method of  claim 1 , wherein the one or more than one anode and the at least one cathode are separated from each other by a permeable barrier. 
     
     
         6 . The method of  claim 1 , wherein the surface density is 8 m 2 /L or more. 
     
     
         7 . The method of  claim 1 , wherein the surface density is in a range from 6 m 2 /L to 100 m 2 /L. 
     
     
         8 . The method of  claim 1 , wherein the at least one anode having a surface density of 6 m 2 /L or more is selected from the group consisting of 3D-printed anodes, woven fabric anodes, foam anodes, stacked single-layer anodes, and packed bed anodes. 
     
     
         9 . The method of  claim 8 , wherein the woven fabric anodes comprise woven metallic wires, woven metallized filaments, or both woven metallic wires and woven metallized filaments. 
     
     
         10 . The method of  claim 8 , wherein the woven fabric anodes comprise flat woven fabric anodes, pile fabric anodes, or both flat woven fabric anodes and pile fabric anodes. 
     
     
         11 . The method of  claim 8 , wherein the 3D-printed anodes comprise 3D-printed lattice anodes, 3D-printed lamella anodes, or both 3D-printed lattice anodes and 3D-printed lamella anodes. 
     
     
         12 . The method of  claim 8 , wherein the packed bed anodes comprise a package compartment selected from the group consisting of raschig ring, lessing ring, pall ring, bialecki ring, dixon ring, net balls, and Hex-X compartments. 
     
     
         13 . The method of  claim 1 , wherein the at least one anode having a surface density of 6 m 2 /L or more comprises a material selected from the group consisting of platinum, titanium, niobium, lead, gold, alloys comprising at least one thereof, oxides thereof, and mixtures thereof. 
     
     
         14 . The method of  claim 1 , wherein the one or more than one anode provides a total effective anode surface area A 1  and the at least one cathode a total effective cathode surface area A 2 , wherein A 1  is larger than A 2 . 
     
     
         15 . The method of  claim 1 , wherein A 1 :A 2  is ranging from 5:1 to 100:1.