US 12,345,657 B2
Method for inspecting damage in reverse osmosis membrane
Kenji Saito, Ehime (JP); Koji Nakatsuji, Ehime (JP); Hiroo Takabatake, Otsu (JP); and Shinya Shimoda, Ehime (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 18/281,406
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Mar. 25, 2022, PCT No. PCT/JP2022/014666
§ 371(c)(1), (2) Date Sep. 11, 2023,
PCT Pub. No. WO2022/203078, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-052866 (JP), filed on Mar. 26, 2021.
Prior Publication US 2024/0159687 A1, May 16, 2024
Int. Cl. G01N 21/95 (2006.01); B01D 61/02 (2006.01); B01D 61/10 (2006.01); B01D 63/10 (2006.01); B01D 65/10 (2006.01); G01N 1/34 (2006.01)
CPC G01N 21/95 (2013.01) [B01D 61/025 (2013.01); B01D 61/10 (2013.01); B01D 63/10 (2013.01); B01D 65/109 (2022.08); G01N 1/34 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A damage inspection method for a reverse osmosis membrane,
wherein at least one of: presence or absence of physical damage; and a degree of physical damage in a reverse osmosis membrane is inspected based on presence or absence of a stained area on at least a permeate side of a stained membrane obtained by supplying a water-to-be-treated comprising a staining agent to the reverse osmosis membrane to stain the reverse osmosis membrane.