An aluminum ferric sulfate salt flocculant and a preparation method thereof

By modifying attapulgite clay with an organic-inorganic hybrid composite material of ferric sulfate, aluminum sulfate, and carbide slag, the problem of insufficient performance of existing flocculants is solved, achieving efficient flocculation, deep decolorization, and rapid sedimentation. It has wide adaptability and is suitable for the field of water treatment.

CN121609418BActive Publication Date: 2026-05-12SHAANXI ZHUOYUE MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202610145002.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-02
Publication Date
2026-05-12
Estimated Expiration
2046-02-02

AI Technical Summary

Technical Problem

Existing aluminum or iron salt flocculants have inherent performance defects, conventional composite flocculants lack functional synergy, and natural attapulgite, when used as a flocculant after direct or simple modification, performs poorly and has poor removal effect on dissolved organic matter.

Method used

Aluminum sulfate and ferric salt flocculant were used. Modified attapulgite carrier was subjected to hydrolysis-loading reaction with ferric sulfate, aluminum sulfate and carbide slag under controlled pH conditions to construct an organic-inorganic hybrid composite material. The modified attapulgite carrier’s nano-adsorption framework, starch chain bridging and cationic polymer charge neutralization capacity were utilized to form a highly efficient flocculation effect in combination with sodium silicate network.

Benefits of technology

It achieves high turbidity removal rate, deep decolorization, rapid sedimentation, and good economic and environmental performance. The acryloyloxyethyltrimethylammonium chloride grafted on the modified attapulgite carrier provides strong positive charge, which efficiently neutralizes and adsorbs negatively charged dissolved organic matter. The flocs are dense and settle quickly, with wide adaptability and easy large-scale production.

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Abstract

The application relates to the technical field of water treatment flocculants, and discloses an aluminum-iron sulfate salt flocculant and a preparation method thereof. The method is characterized in that firstly, the attapulgite is subjected to acid activation, silanization, starch etherification grafting and free radical copolymerization modification, so as to obtain a modified attapulgite functional carrier which has a nano adsorption skeleton, an organic long chain and strong positive electricity; then, the carrier is taken as a core to carry out a hydrolysis-supporting reaction with ferric sulfate, aluminum sulfate and carbide slag under pH control; finally, sodium silicate is introduced to construct an inorganic gel network, and the aluminum-iron sulfate salt flocculant is obtained through ripening and drying. Through construction of an organic-inorganic hybrid structure, the application realizes multiple synergies of electric neutralization, adsorption bridging and net capture and sweeping, the product has high removal capacity for colloidal particles and dissolved organic matters, the flocculation body is compact and can be rapidly settled, and the product has the comprehensive advantages of low raw material cost, stable process and environmental friendliness.
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