US 12,281,009 B2
Method and apparatus for generating chlorine dioxide
Alistair Peter Cameron, Kelso (GB); Nicola Louise Palmer, Kelso (GB); and Thomas James Livesey, Kelso (GB)
Assigned to Scotmas Group Limited, Kelso (GB)
Appl. No. 17/255,282
Filed by SCOTMAS GROUP LIMITED, Kelso (GB)
PCT Filed Jun. 25, 2019, PCT No. PCT/GB2019/051788
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2020/002901, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 1810369 (GB), filed on Jun. 25, 2018.
Prior Publication US 2021/0171347 A1, Jun. 10, 2021
Int. Cl. C01B 11/02 (2006.01); B01D 69/14 (2006.01); B01J 23/34 (2006.01); B01J 23/42 (2006.01); B01J 31/08 (2006.01); B01J 35/59 (2024.01); B01J 35/64 (2024.01)
CPC C01B 11/028 (2013.01) [B01D 69/145 (2013.01); B01J 23/34 (2013.01); B01J 23/42 (2013.01); B01J 31/08 (2013.01); B01J 35/59 (2024.01); B01J 35/643 (2024.01); B01D 2311/2696 (2013.01); B01D 2325/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of forming chlorine dioxide comprising:
providing a hydrophobic microporous membrane having a first face, a second face and a wall thickness extending between the first face and the second face, the membrane comprising a catalyst for catalysing the formation of chlorine dioxide from chlorous acid, wherein the catalyst is provided within the 50% of the wall thickness at or towards the first face, and wherein only a negligible amount of the catalyst is provided within the 30% of the wall thickness at or towards the second face;
feeding an aqueous solution of chlorous acid to the first face of the hydrophobic microporous membrane;
wherein the chlorous acid contacts the catalyst and oxidises to chlorine dioxide;
wherein chlorine dioxide in gaseous form passes through the hydrophobic microporous membrane to the second face thereof wherein the second face is in fluid communication with an outlet for providing the chlorine dioxide formed.