Recovery system and method for germanium-containing liquid in high-purity germanium dioxide production
A germanium dioxide and recovery method technology, applied in chemical instruments and methods, germanium halide, neutralization water/sewage treatment, etc., can solve the problems of low leaching rate, high adjustment precision, easy kiln formation in post-treatment production process, etc.
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Embodiment 1
[0039] Adopt above-mentioned method to reclaim germanium-containing liquid in the production of high-purity germanium dioxide, wherein the auxiliary agent adopted in the S2 step is a mixture of quicklime and gypsum powder, in parts by weight, the ratio of quicklime and gypsum powder is 2:1, wherein The dosage of quicklime is 2.5g per liter of the solution to be reacted.
[0040] This method only needs to test the pH at intervals, and it can be used after it meets the requirements, avoiding repeated adjustments to the pH value, and the volume of each liquid mixed does not need to be accurate, and can be realized within a rough range; using this method to obtain The requirements for the equipment for the filter cake in the post-treatment dehydration are not high, and the requirements for the post-treatment after using ferric chloride or tannin recovery are high, and it is easy to break, and it is convenient for leaching and distillation; and the method has simple steps, convenien...
Embodiment 2
[0042] The above method is used to recover the germanium-containing liquid in the production of high-purity germanium dioxide, wherein the auxiliary agent used in the S2 step is magnesium chloride.
[0043] The auxiliary agent of this embodiment can precipitate germanium in the germanium-containing liquid, but the applicant found that when using this auxiliary agent, in the S6 step, crystallization easily occurs in the connecting pipe between the rear liquid circulation temporary storage tank and the tail gas absorption liquid storage tank , leading to blockage, which is difficult to deal with.
Embodiment 3
[0045] The above method is used to recover the germanium-containing liquid in the production of high-purity germanium dioxide, wherein the auxiliary agent used in the S2 step is magnesium oxide.
[0046] The effect of the auxiliary agent in this embodiment is similar to that of embodiment 2, and there is also the problem of crystallization blockage.
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