Preparation method of strontium carbonate with high purity
A technology of high-purity strontium carbonate and high-purity water, which is applied in the direction of calcium carbonate/strontium/barium, calcium/strontium/barium sulfate, etc., can solve the difficulty of handling ammonium chloride solution, the difficulty of chloride washing, and the difficulty of synthesizing particle size and other problems, to achieve the effect of easy product quality, high utilization rate and reduced consumption
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[0033] Embodiment: the preparation method of high-purity strontium carbonate of the present invention, as image 3 As shown, it includes the following steps: (1) first remove impurities from the brine (the main component is strontium sulfide solution) in the strontium sulfide leaching process, and then cool and crystallize (the main component of the crystal is strontium hydroxide octahydrate); (2) put The crystals are separated and washed, and the washing liquid is returned to the leaching process; (3) The first recrystallization: the crystals are dissolved in high-purity water at 90 ° C, and every 20 grams of strontium hydroxide octahydrate crystals are dissolved in 100 ml of high-purity water, and hydrogen peroxide is added at the same time Oxidize sulfur ions in various valence states in the solution, the molar ratio of hydrogen peroxide to sulfur ions in the solution is 1:1; stir for 30 minutes, filter, the filter residue is mainly strontium sulfate precipitate, after treat...
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