	US 12,478,928 B2
	Ultrafine bubble generator and ultrafine bubble generation method
Yoshifumi Jahana, Kashiwara (JP); Wataru Kumano, Kashiwara (JP); Michiaki Araki, Kashiwara (JP); Yuka Oda, Kashiwara (JP); Emiko Kawamukai, Kashiwara (JP); and Yoshihiko Hirata, Kashiwara (JP)
Assigned to SARAYA CO., LTD., Osaka (JP)
Appl. No. 17/789,454
Filed by SARAYA CO., LTD., Osaka (JP)
PCT Filed Dec. 25, 2020, PCT No. PCT/JP2020/049043 § 371(c)(1), (2) Date Aug. 24, 2022, PCT Pub. No. WO2021/132701, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-239873 (JP), filed on Dec. 27, 2019.
Prior Publication US 2023/0056021 A1, Feb. 23, 2023
Int. Cl. B01F 23/2373 (2022.01); B01F 23/232 (2022.01); B01F 23/237 (2022.01); C07H 15/04 (2006.01)

CPC B01F 23/2373 (2022.01) [B01F 23/232 (2022.01); B01F 23/237612 (2022.01); B01F 23/23762 (2022.01); B01F 23/23763 (2022.01); B01F 23/23764 (2022.01); C07H 15/04 (2013.01)]

6 Claims

1. An ultrafine bubble generator comprising a combination of the following (A), (B), and (C):

(A) a sophorolipid containing acidic sophorolipid and lactonic sophorolipid in a ratio (mass ratio) of 78:22 to 100:0,

(B) a free fatty acid or salt thereof, and

wherein ultrafine bubbles are generated by adding (A), (B), and (C) to water to allow (A), (B), and (C) to coexist in the water under atmospheric pressure conditions without introducing gas from outside, and

the ultrafine bubbles have an average number particle size of 50 nm or more and less than 1000 nm as measured with a dynamic light scattering spectrophotometer.