A method for preparing an alumina sol-gel

Alumina hydrate is generated by reacting inorganic aluminum source aluminum sulfate with sodium bicarbonate. Combined with carboxylation and polymerization treatment, a highly polymerized aluminum carboxylate spinning gel is formed, which solves the problems of high cost and complex process in the preparation of alumina spinning gel and realizes low-cost and high-efficiency spinning gel preparation.

CN121494031BActive Publication Date: 2026-07-24CHALCO SHANDONG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHALCO SHANDONG CO LTD
Filing Date
2025-12-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing methods for preparing alumina spinning gels are costly and complex, especially the use of organic aluminum sources and thickeners, which increases production costs and complicates the process.

Method used

Alumina hydrate is generated by reacting inorganic aluminum source aluminum sulfate with sodium bicarbonate. The hydrate is then processed through low-temperature mixing, filtration, washing, drying, crushing, mixing, carboxylation, polymerization, and aging to form a highly polymerized aluminum carboxylate spinning gel. This process avoids the use of organic aluminum sources and thickeners and allows for precise control of process parameters to simplify the process.

Benefits of technology

It significantly reduces the production cost of alumina spinning gel, simplifies the process, and improves the quality and performance of spinning gel, making it suitable for continuous alumina fiber production in high-tech fields.

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Abstract

The application relates to a preparation method of an alumina spinning gel and belongs to the technical field of colloidal materials. According to the technical scheme, an inorganic aluminum source is used to replace a traditional organic aluminum source, and the reaction ratio of aluminum sulfate and sodium bicarbonate is controlled under low-temperature conditions to synthesize an alumina hydrate with high activity; further, the temperature, time and material ratio of a carboxylation, polymerization and aging process are accurately controlled to make aluminum carboxylate self-polymerize to form high-viscosity high-polymer aluminum carboxylate without additional addition of a thickening agent and a spinning aid, so that the performance of the alumina spinning gel is ensured, the process complexity is simplified, and finally the preparation of the alumina spinning gel with low cost and high performance is realized.
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