Method for producing barium chloride by heterogeneous co-heating method

Abstract

The invention discloses a method for producing barium chloride through a nonhomogeneous phase co-heating method. The method comprises the following steps that: industrial ammonium chloride and witherite mineral powder which contains over 66 percent of barium carbonate, has a granularity of between 100 and 800 meshes and contains water of less than 2 percent are evenly mixed according to the stoichiometric ratio that the witherite mineral powder amount exceeds 20 percent by commutation; the industrial ammonium chloride and the witherite mineral powder are stirred and heated for reaction in a sealed reactor for 60 to 180 minutes; the reaction temperature is between 300 and 550 DEG C; the operation pressure is between 0.1 and 0.3 MPa; a product is dissolved by water, deposited, filtered, condensed and crystallized, thereby obtaining a finished product of industrial barium chloride. The method solves the problems that the reaction conversion rate does not reach the industrialized need and material has back mixing in the prior art; and the method is a brand new method for producing barium chloride without industrial hydrochloric acid, thereby avoiding mass consumption of the industrial hydrochloric acid, developing the application of the ammonium chloride and bringing a larger selective space for a barium chloride manufacturer.

Description

technical field [0001] The invention relates to the technical field of inorganic salt chemical industry, in particular to a method for producing barium chloride by a heterogeneous co-heating method. Background technique [0002] Due to the different sources of mineral resources in the production of industrial barium chloride, its production process has two main lines: one is sulfate-type barium ore, also known as barite, and its main component is barium sulfate. Its production must be calcined at high temperature to make sulfate Barium is converted into barium sulfide, and then the corresponding reactants are added to produce barium series products such as barium chloride, barium nitrate, barium metaborate, and barium hydroxide. Due to the need for high-temperature calcination, high-temperature kilns must be built for production, and energy consumption , The cost is higher. The second is carbonate-type barium ore, also known as witherite, whose main component is barium carb...

AI Technical Summary

Problems solved by technology

However, industrial hydrochloric acid is limited by its own chemical properties, its content is generally 30-31%, and it is a dangerous chemical. It is severely restricted by transportation conditions and is not suitable for long-distance transportation. Therefore, barium chloride production enterprises can only choose to build in industrial hydrochloric acid production areas.

Witherite mines are generally located deep in the mountains. In my country, mainly in Chongqing Chengkou, Shaanxi Ankang and Daba Mountains in Sichuan Wanyuan, the conditions for cooperation in the chemical industry are poor, and there are few industrial hydrochloric acid manufacturers. Therefore, they have the resource advantages of chemical mines. Unable to transform economic advantages Existing homogeneous reaction technology, the reaction conversion rate of witherite ore powder and ammonium chloride cannot meet the requirements of industrialization, and cannot solve the problem of back-mixing of raw material ammonium chloride and product barium chloride