Method for preparing magnesium hexaborate

Abstract

The invention relates to a method for preparing an inorganic chemical raw material, in particular to a method for preparing magnesium hexaborate, which particularly comprises the following steps: (2) burning basic magnesium carbonate or magnesium oxide for 2.5 to 6 hours at a temperature of between 600 and 1,000 DEG C to obtain activated magnesium oxide; (2) mixing the activated magnesium oxide with boric acid and water in a mass ratio of 1:3-9:60-165, stirring the mixture for 3 to 7 hours, standing the mixture for 1 to 6 hours, and filtering the mixture to obtain a clear filtrate; (3) standing the clear filtrate for 10 to 22 hours, then stirring, heating and concentrating the clear filtrate, and cooling the clear filtrate for crystallization; and (4) filtering the mixture of crystalline precipitates generated in the step (3), washing a crystal mass, and drying the crystal mass for 1 to 3 hours at a temperature of between 100 and 160 DEG C to obtain the magnesium hexaborate. The method has the advantages that: 1, the activated magnesium oxide is used as the raw material to improve the reaction rate and the yield and avoid a large amount of unreacted magnesium oxide; and 2, becausethe process is simple, the method can be used for large-scale industrial production.

Description

A kind of preparation method of magnesium hexaborate Technical field: The invention relates to a preparation method of inorganic chemical raw materials, in particular to a preparation method of magnesium hexaborate. Background technique: Boron ore is an important resource in our country, and it has a wide range of uses in the fields of industry, agriculture, metallurgy, medicine, national defense, textiles and high-tech. It is used as micro-fertilizer and pesticide in agriculture; it is used as a metal additive in metallurgy to improve the performance of steel and alloys; in the defense industry, boron fibers made of element boron have high strength and are used as aerospace materials, borohydride compounds It can also be used as a high-energy material for rockets and missiles; in the field of medicine, boron compounds can selectively destroy and inhibit cancer cells and treat brain tumors. At the same time, boron compounds are widely used as nonlinear optical materials, ...

AI Technical Summary

Problems solved by technology

In the prior art, magnesium borate can be synthesized by boric acid and unactivated magnesium oxide. Due to the low hydration rate of unactivated magnesium oxide, boric acid reacts with it very slowly at room temperature, and there are a large amount of unreacted magnesium oxide in the product.

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