Production process of barium carbonate

Abstract

The invention relates to a production process of barium carbonate. The production process comprises the following steps: adding barium hydroxide into high-purity water, and dissolving in a dissolving pump to obtain a barium hydroxide solution; adding liquid ammonia into the barium hydroxide solution, and stirring for 10-60 minutes at a constant temperature of 30-80 DEG C; introducing carbon dioxide into the barium hydroxide solution added with the liquid ammonia through a micro reaction device in a stirring state, and stopping introducing the carbon dioxide when the pH value is equal to 6-9, so as to obtain a barium carbonate solution; heating the prepared barium carbonate solution to enable the barium carbonate solution to fully react; precipitating and filtering to obtain a barium carbonate precipitate; and drying the barium carbonate precipitate in a dryer to obtain high-purity electronic-grade barium carbonate. According to the invention, carbon dioxide and barium hydroxide are used as raw materials for gas-liquid reaction, the production process is simple, no by-product is produced in the reaction, the product purity is high, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to a production process of barium carbonate, in particular to a production method of high-purity electronic grade barium carbonate. Background technique [0002] High-purity barium carbonate is mainly used for solid phase synthesis of electronic sensitive ceramic main crystal phase materials such as titanate, zirconate, stannate, etc. In recent years, with the development of the information and communication industry, the electronic component industry such as laminated capacitors, capacitor-inductor dual-function components, and the barium titanate supercapacitor industry have put forward higher requirements for the specific surface area of ​​high-purity barium carbonate. At the same time, more stringent attention has been paid to the strontium impurity content affecting the sintering temperature. At present, the method for producing high-purity barium carbonate is to react barium chloride and ammonium bicarbonate. The reaction r...

AI Technical Summary

Problems solved by technology

At present, the method of producing high-purity barium carbonate is to react barium chloride and ammonium bicarbonate. The reaction raw materials are all liquid, the production process is complicated, there are many by-products, the specific surface area is small, and the dispersion is not high.

Moreover, the current amount of dispersant is relatively large, for example: the amount of N-acyl ED3A is generally 4% of the total solution, and the production cost is high

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