	US 11,938,416 B2
	Polyether polyol refining method and refining apparatus
Zhijun Li, Shanghai (CN); Cheng Wu, Shanghai (CN); Yumin Zhang, Shanghai (CN); and Yubo Li, Shanghai (CN)
Assigned to Jiahua Chemistry (Binzhou) Co., Ltd., Shandong (CN); and Jiahua Chemicals (Shanghai) Ltd., Shanghai (CN)
Appl. No. 16/982,796
Filed by JIAHUA CHEMISTRY (BINZHOU) CO., LTD., Shandong (CN); and JIAHUA CHEMICALS (SHANGHAI) LTD., Shanghai (CN)
PCT Filed Nov. 1, 2019, PCT No. PCT/CN2019/114942 § 371(c)(1), (2) Date Sep. 21, 2020, PCT Pub. No. WO2020/088632, PCT Pub. Date May 7, 2020.
Claims priority of application No. 201811306363.2 (CN), filed on Nov. 2, 2018.
Prior Publication US 2021/0275941 A1, Sep. 9, 2021
Int. Cl. B01D 11/04 (2006.01); B01D 17/04 (2006.01)

CPC B01D 11/0449 (2013.01) [B01D 11/0457 (2013.01); B01D 11/0492 (2013.01); B01D 17/045 (2013.01)]

8 Claims

1. Refining method for polyether polyol, consisting of the following steps:

(1) neutralizing or diluting crude polyether polyol to obtain a mixed solution containing the crude polyether polyol;

(2) flowing the mixed solution through a hydrophilic medium to aggregate same into a first density phase liquid and a second density phase liquid, the first density phase liquid being an aqueous solution containing alkaline metal ions and/or alkaline earth metal ions, and the second density phase liquid being polyether polyol; and

(3) allowing the first density phase liquid to settle and separating same from the second density phase liquid to obtain refined polyether polyol.