US 12,466,749 B1
Flocculant for treating fracturing flowback fluid and preparation method therefor
Tao Zhang, Chengdu (CN); Guanjun Wang, Chengdu (CN); Fuyou Huang, Chengdu (CN); Sheng Zhou, Chengdu (CN); Xiongying He, Chengdu (CN); Weisheng Zhao, Chengdu (CN); and Jing Luo, Chengdu (CN)
Assigned to Shineon Environments Technology Services Co., Ltd., Chengdu (CN)
Filed by Shineon Environments Technology Services Co., Ltd., Chengdu (CN)
Filed on Feb. 12, 2025, as Appl. No. 19/051,404.
Claims priority of application No. 202410560049.6 (CN), filed on May 8, 2024.
Int. Cl. C02F 1/56 (2023.01); C02F 1/52 (2023.01); C02F 1/54 (2023.01); C02F 101/20 (2006.01); C02F 101/30 (2006.01); C02F 103/10 (2006.01)
CPC C02F 1/56 (2013.01) [C02F 1/5272 (2013.01); C02F 1/542 (2013.01); C02F 2101/203 (2013.01); C02F 2101/308 (2013.01); C02F 2103/10 (2013.01)] 8 Claims
 
1. A preparation method for a flocculant for treating fracturing flowback fluid, comprising the following steps in parts by weight: dissolving gelatinized starch in water, adding unsaturated polyethylene glycol, unsaturated short-chain carboxylic acid, hydroxyethyl methacrylate phosphate and an initiator under a nitrogen atmosphere for reaction for 3-8 h, and after the reaction is completed, separating and purifying to obtain a product; wherein a mass ratio of the gelatinized starch to the unsaturated polyethylene glycol to the unsaturated short-chain carboxylic acid to the hydroxyethyl methacrylate phosphate is 100:20-40:3-8:1-5.