Method for preparing beryllium oxide or high-purity beryllium oxide from beryllium-containing solution
A technology of beryllium oxide and beryllium solution, which is applied in the direction of beryllium oxide/hydroxide, etc., which can solve the problems of high grade requirements, product purity impact, low recovery rate, etc., and achieve low grade requirements, less waste residue and exhaust gas emissions , Easy and flexible operation
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Embodiment 1
[0017] Embodiment 1, the method for producing beryllium oxide from beryllium-containing solution is carried out as follows: the first step, the phosphoric acid extractant, alcohol and sulfonated kerosene by volume ratio phosphoric acid extractant: alcohol: sulfonated kerosene is 10:10:75 to 25:15:90 Weigh and mix them together to make an extraction agent. The beryllium-containing solution with a pH of 2 to 4 and the extraction agent are multi-staged at a volume ratio of 1:3 to 1:6. Countercurrent extraction, extracting to obtain the extracted organic phase and the raffinate aqueous phase, the concentration of beryllium ions in the extracted organic phase is 5g / L to 10g / L; the second step is to prepare an aqueous oxalic acid solution with a mass concentration of 5% to 25%, The oxalic acid aqueous solution and the extracted organic phase are subjected to multi-stage countercurrent washing at a volume ratio of 1:3 to 1:6, and the washed extracted organic phase and the washed was...
Embodiment 2
[0018] Embodiment 2, the method for producing beryllium oxide from beryllium-containing solution is carried out as follows: the first step, the phosphoric acid extractant, alcohol and sulfonated kerosene by volume ratio phosphoric acid extractant: alcohol: sulfonated kerosene is 10:10:75 or 25:15:90 weighed and mixed together to prepare the extraction agent, the beryllium-containing solution with a pH of 2 or 4 and the extraction agent were multi-staged at a volume ratio of 1:3 or 1:6 Countercurrent extraction, the extraction obtains the extracted organic phase and the raffinate aqueous phase, and the concentration of beryllium ions in the extracted organic phase is 5g / L or 10g / L; the second step is to prepare an aqueous oxalic acid solution with a mass concentration of 5% or 25%, The oxalic acid aqueous solution and the extracted organic phase are subjected to multi-stage countercurrent washing at a volume ratio of 1:3 or 1:6, and the washed extracted organic phase and the w...
Embodiment 3
[0019] Example 3, as an optimization of Example 1 and Example 2, in Example 3, the phosphoric acid extractant is a phosphoric acid series extractant with different substituents.
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