US 12,459,880 B2
Halon purification method
Kanako Kogashi, Tokyo (JP)
Assigned to Resonac Corporation, Tokyo (JP)
Appl. No. 18/011,416
Filed by SHOWA DENKO K. K., Tokyo (JP)
PCT Filed Jul. 16, 2021, PCT No. PCT/JP2021/026842
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2022/044613, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-140977 (JP), filed on Aug. 24, 2020.
Prior Publication US 2023/0322650 A1, Oct. 12, 2023
Int. Cl. C07C 17/38 (2006.01); B01D 53/14 (2006.01)
CPC C07C 17/38 (2013.01) [B01D 53/1493 (2013.01); B01D 2251/304 (2013.01); B01D 2251/306 (2013.01); B01D 2256/26 (2013.01); B01D 2257/2022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A halon purification method for removing bromine molecules from crude halon containing halon and the bromine molecules, the method comprising:
a contact step of bringing the crude halon into contact with an absorbing liquid containing an aqueous solution containing metal iodide to obtain a mixed liquid containing the crude halon and the absorbing liquid; and
a separation step of separating the halon from the mixed liquid to obtain the halon and the absorbing liquid having absorbed the bromine molecules.