Method for producing high-purity barium chloride with low strontium and high-purity barium chloride with low strontium

A method for producing barium chloride is characterized in comprising following processes:

• 1) reacting process:
• adding barium carbonate and hydrochloric acid into acid-resistant reactor under agitation to carry out reaction, keeping system temperature at 55-60° C., controlling the reaction so as to make pH value of reaction solution at endpoint in a range of 3.5-4.0, after completing reaction, separating solid from liquid to obtain clear filtration containing barium chloride as liquid phase, and putting it into the following process;
• 2) adjusting process by excess acid:
• adding the clear filtration containing barium chloride obtained by separation from process 1) into acid-resistant reactor, adding hydrochloric acid slowly under agitation, controlling [H+] in a range of 2.0-6.0 mol/L, cooling the solution until the temperature of the solution reaches less than 35° C., then separating solid from liquid, and putting obtained barium chloride crystal as solid phase into the following process;
• 3) dissolving and removing impurities process:
• dissolving barium chloride crystal obtained by separation with water to prepare saturated solution at a temperature of 80-90° C., adding hydrogen peroxide, heating the solution to slightly boil, then neutralizing the solution with barium hydroxide to pH 7.0-7.5, separating solid from liquid and putting obtained liquid phase into the following process;
• and
• 4) separating and drying process:
• transferring the above liquid phase obtained by separation into cooling crystallizer, cooling slowly to 38-42° C., then separating solid from liquid, and drying the solid to obtain the barium chloride product.