A solid slow-release scale inhibitor and a preparation method thereof

By using sulfonated MOFs materials to load scale inhibitors, the problems of insufficient thermal stability and alkali resistance of existing solid slow-release scale inhibitors are solved, achieving long-lasting scale inhibition effect and low-cost operation in harsh environments.

CN118833938BActive Publication Date: 2026-06-19BAOWU JINGGAO (ANHUI) TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOWU JINGGAO (ANHUI) TECHNOLOGY CO LTD
Filing Date
2024-07-22
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing solid slow-release scale inhibitors have poor thermal stability and alkali resistance, making them unsuitable for effective application under a wider range of environmental conditions.

Method used

Using MOFs as a loading agent, sulfonated MOFs are prepared through sulfonation treatment. Scale inhibitors are then loaded onto these MOFs. By utilizing the high specific surface area and pore structure of MOFs, combined with biodegradable or environmentally friendly metal ions and organic ligands, a solid slow-release scale inhibitor with good thermal and chemical stability is prepared.

Benefits of technology

This improved the structural and functional stability of the scale inhibitor in harsh water treatment environments, achieving a long-lasting scale inhibition effect while reducing operating costs and environmental impact.

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Abstract

This invention provides a solid slow-release scale inhibitor and its preparation method, aiming to achieve efficient and long-lasting scale inhibition by loading the scale inhibitor onto sulfonated MOF materials. The scale inhibitor consists of 30-60 parts scale inhibitor, 8-20 parts MOF material loading agent, and 5-19 parts binder. The MOF materials include zeolite imidazole salts and phosphate-imidazole MOFs, possessing high specific surface area and porosity, and can selectively adsorb ions that lead to scaling. Both the scale inhibitor and binder are commercially available materials, prepared through specific chemical reactions and steps. The scale inhibitor of this invention exhibits excellent thermal stability, chemical stability, and environmental friendliness, making it suitable for various water treatment needs. By controlling the chemical composition and structure of the MOFs, the slow-release function of the scale inhibitor can be achieved, reducing operating costs and minimizing environmental impact.
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