Method for preparing ultra-white ultra-fine aluminum hydroxide by cell mill water grinding method seed crystals

Abstract

The invention discloses a method for preparing ultra-white ultra-fine aluminum hydroxide by cell mill water grinding method seed crystals. The method comprises adding seed crystals obtained by a cellmill water grinding method into an aluminum-based micro-nano ultra-white ultra-fine aluminum hydroxide raw material sodium aluminate solution so that the micro-nano ultra-white ultra-fine aluminum hydroxide is prepared. The method utilizes a scientific and reasonable principle, satisfies the requirements on production of the aluminum-based micro-nano ultra-white ultra-fine aluminum hydroxide product, has high production efficiency and low production energy consumption, is environmentally friendly in production, has good comprehensive utilization effects of resources and reduces a production cost. The aluminum-based micro-nano ultra-white ultra-fine aluminum hydroxide product has high dispersity, a good crystal structure, high product quality and high granularity.

Description

technical field [0001] The invention relates to the field of fine chemical new materials, in particular to a method for preparing ultra-white and ultra-fine aluminum hydroxide by cell milling and water milling seed crystals. Background technique [0002] Basic properties of aluminum hydroxide: Aluminum hydroxide, chemical formula Al(OH) 3 , is the hydroxide of aluminum; aluminum hydroxide can not only react with acid to form salt and water, but also react with strong base to form salt and water, so it is also an amphoteric hydroxide; because it is also acidic, it can be called aluminate (H 3 AlO 3 ). However, tetrahydroxyaluminate ([Al(OH) 4 ] - ). Therefore, it is usually regarded as monohydrated metaaluminate (HAlO 2 •H 2O ). [0003] CAS number: 21645-51-2; Molecular formula: Al(OH) 3 ; Molecular weight of aluminum hydroxide: 78.00360 Exact mass: 77.98980; PSA: 60.69000; [0004] Physical and chemical properties: appearance and properties: white amorphous powde...

AI Technical Summary

Problems solved by technology

[0006] The seeds required for the production of aluminum-based micro-nano ultra-white and ultra-fine aluminum hydroxide products generally use dry seeds, and the resulting products often appear in the form of lumps, with low dispersion and poor crystal structure, resulting in poor product quality and particle size. It is relatively low, the production is difficult, and it causes waste of seed crystals, and the production cost is high; and the particle size of the seed crystals used in the conventional production of aluminum-based micro-nano ultra-white ultra-fine aluminum hydroxide products is usually above 3.5 μm, and there are also scattered Low density and poor crystal structure, resulting in low product particle size and high production costs

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