Preparation method of pseudo-boehmite
By using a combination of inorganic aluminum salt and polymer aluminum chloride, combined with ammonium bicarbonate, urea and PEG600-800 composite pore reamer, the gradient heating drying method was used to prepare the phthalinated alumina, which solved the problem of low specific surface area and gum-soluble properties in the prior art, and achieved the effect of high specific surface area and high gum-soluble index.
CN119873866APending Publication Date: 2025-04-25RICKER NEW ENERGY TECH (QINGDAO) CO LTD
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Patent Information
- Application Number
- CN202510059003.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-25
AI Technical Summary
Technical Problem
The specific surface area and gum-soluble properties of the existing double-aluminum method are low, which affects its crystallinity, sintering performance and stability.
Method used
The combination of inorganic aluminum salt and polymer aluminum chloride was used, combined with ammonium bicarbonate, urea and PEG600-800 composite pore reamer, and the pseudothic aluminite was prepared by gradient heating and drying.
Benefits of technology
The specific surface area and gumification index of phthalite were effectively improved, and its composite performance was improved, ensuring that the specific surface area was 445.8-475.2m2/g and the gumification index was 98.2-99.6%.
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Abstract
The invention relates to a preparation method of pseudo-boehmite, which comprises the following steps: (1) dissolving inorganic aluminum salt and polyaluminum chloride in water to prepare an aluminum salt solution; (2) dissolving meta-aluminate in water, and then adding a composite pore-enlarging agent to prepare a meta-aluminate composite solution; (3) dropwise adding the meta-aluminate composite solution into the aluminum salt solution to form gel, stirring while dropwise adding, and controlling the gel forming temperature to be 60-70 DEG C; (4) adjusting the pH value of the reaction liquid to 9.0 by using ammonia water, controlling the temperature at 85-90 DEG C, and stirring and aging for 1-2 hours; (5) after aging is completed, collecting a product, filtering and washing with water; and (6) drying by adopting a gradient heating mode. The inorganic aluminum salt and the polyaluminum chloride are combined, the ammonium bicarbonate, the urea and the PEG600-800 are compounded to serve as a pore-enlarging agent, and gradient heating is adopted for drying, so that the specific surface area of the pseudo-boehmite can be effectively increased, the peptizing index is improved, the pseudo-boehmite has good compounding performance, the specific surface area is 445.8-475.2 m < 2 > / g, and the peptizing index is 98.2-99.6%.
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