Coated modified anhydrous lithium hydroxide and a method for preparing the same
By coating the surface of anhydrous lithium hydroxide with materials such as polyaspartic acid, the problems of dust dispersion and absorption performance of lithium hydroxide have been solved, thereby improving safety and absorption performance and expanding its application range.
CN119016035BActive Publication Date: 2026-04-10HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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Patent Information
- Application Number
- CN202411140939.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2026-04-10
- Estimated Expiration
- 2044-08-20
AI Technical Summary
Technical Problem
Existing lithium hydroxide has problems such as dust generation, high irritation during use, high water content, low effective absorbent content, modifier volatility, and poor gas permeability.
Method used
A physical coating layer such as polyaspartic acid, polyacrylamide, or polyacrylic acid is coated onto the surface of anhydrous lithium hydroxide. This simple preparation method increases particle hardness, reduces dust diffusion, and maintains absorption performance.
Benefits of technology
It effectively solves the dust problem, improves the safety and absorption performance of lithium hydroxide, expands the scope of application, reduces costs, and avoids the harm to human health caused by the volatilization of modifiers.
✦ Generated by Eureka AI based on patent content.
Abstract
The application relates to the technical field of lithium hydroxide, and particularly discloses coated modified anhydrous lithium hydroxide and a preparation method thereof. The coated modified anhydrous lithium hydroxide is prepared by the following steps: weighing an internal matrix and an external coating modifier; the internal matrix is anhydrous lithium hydroxide, and the external coating modifier is one of polyaspartic acid, polyacrylamide or polyacrylic acid; the external coating modifier is dissolved in deionized water to prepare a coating modifier solution; the matrix is coated with the coating modifier solution to obtain wet coated modified anhydrous lithium hydroxide; and the wet coated modified anhydrous lithium hydroxide is dried to obtain the coated modified anhydrous lithium hydroxide. The coated modified anhydrous lithium hydroxide has a physical coating layer on the surface of the anhydrous lithium hydroxide, the operation is simple, the particle hardness can be increased, the dust diffusion caused by collision and friction on the particle surface can be effectively reduced, and the dust raising problem is solved. The coated modified anhydrous lithium hydroxide can guarantee the effective absorption agent content and absorption performance, improve the use safety of the lithium hydroxide absorption agent, and meet the requirements of products of the anhydrous lithium hydroxide in multiple fields.
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