	US 12,434,190 B2
	Draw solute, draw solution, and water treatment device
Hiroki Tokushima, Suita (JP); Akitoshi Matono, Suita (JP); and John Webley, Rohnert Park, CA (US)
Assigned to Nippon Shokubai Co., Ltd., Osaka (JP); and Trevi Systems Inc., Rohnert Park, CA (US)
Appl. No. 17/916,931
Filed by Nippon Shokubai Co., Ltd., Osaka (JP); and Trevi Systems Inc., Rohnert Park, CA (US)
PCT Filed Apr. 7, 2021, PCT No. PCT/JP2021/014719 § 371(c)(1), (2) Date Oct. 4, 2022, PCT Pub. No. WO2021/206116, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-069834 (JP), filed on Apr. 8, 2020.
Prior Publication US 2023/0149854 A1, May 18, 2023
Int. Cl. B01D 61/00 (2006.01); C02F 1/44 (2023.01); C08G 65/08 (2006.01)

CPC B01D 61/005 (2013.01) [C02F 1/445 (2013.01); C08G 65/08 (2013.01)]

16 Claims

1. A draw solute for the forward osmosis membrane process, the draw solute comprising a random copolymer obtainable by random addition of a monomer containing ethylene oxide and butylene oxide to a compound having two or more hydroxyl groups, wherein a molar ratio of ethylene oxide to butylene oxide is 2.5:1 to 5:1.