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Research on production process of high-purity barium hydroxide prepared from barium chloride
Received date: 2024-04-02
Online published: 2025-04-21
China has abundant barium ore resources，but some specialized high-purity barium materials still rely on imports.In order to enhance the international competitiveness of products and achieve safe and controllable industrial supply chain，research was conducted on the production process of high-purity barium hydroxide.The crystallization temperature of barium hydroxide in different solution compositions was mainly measured.Further，through orthogonal experimental design and response surface curve analysis，the effects of barium chloride mass fraction，insulation time，and stirring speed on the crystallization of barium hydroxide were investigated to obtain the optimal process conditions.Finally，high-purity barium hydroxide was obtained through recrystallization.The results showed that the optimal process for single crystallization was w（BaCl2· 2H2O） at 27.32%，insulation time of 2.1 h，stirring speed of 306 r/min，laboratory chloride ion at 0.015%，corresponding to 0.017% of the production line product chloride ion，which met the chemical purity requirements of "Reagent grade barium hydroxide octahydrate"（HG/T 2629—2011）.When w［Ba（OH）2·8H2O］ was 42.85%，the insulation time was 2.0 h，and the stirring speed was 306 r/min，high-purity barium hydroxide with chlorine content of 0.000 7%，magnesium content of 0.000 6%，calcium content of 0.000 5%，iron content of 0.000 1%，and strontium content of 0.000 9% could be produced，and the product yield could reach over 91.87%.This study was aimed to optimize and improve the production process of high-purity barium hydroxide，which could effectively enhance technical requirements，reduce costs and increase efficiency，enhance product international competitiveness，and meet the needs of upgrading and developing the electronic new materials industry chain.
ZHANG Yan , JIANG Wenwei , YE Xianyu , PENG Xiaoshuang . Research on production process of high-purity barium hydroxide prepared from barium chloride[J]. Inorganic Chemicals Industry, 2025 , 57(4) : 67 -72 . DOI: 10.19964/j.issn.1006-4990.2024-0185
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