Method for separating, enriching and recycling indium from low-concentration indium sulphate solution
A technology of separation and enrichment and indium sulfate, applied in the direction of improving process efficiency, etc., can solve the problems of unresolved chlorine-containing waste acid discharge, unsuitable for separation and recovery, etc., to reduce adverse effects, eliminate dispersion losses, and reduce production cost effect
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Embodiment 1
[0029] Such as figure 1As shown, the method for separating, enriching and recovering indium from a low-concentration indium sulfate solution comprises: first extracting the low-concentration indium sulfate solution with P204, and then back-extracting it with hydrochloric acid to obtain an indium chloride back-extraction solution; The obtained indium chloride back-extraction solution is then extracted with TBP, back-extracted with dilute sulfuric acid to obtain a high-concentration indium sulfate solution, and finally the high-concentration indium sulfate solution is replaced by metal to obtain sponge indium.
[0030] The specific steps are:
[0031] (1) P204 extraction: first mix P204 and sulfonated kerosene at a volume ratio of 20:80 to obtain an organic phase, then mix the low-concentration indium sulfate solution and the organic phase at a volume ratio of 2:1 and add them to a box-type mixing and settling tank Three-stage counter-current extraction was carried out in 50°C...
Embodiment 2
[0037] Such as figure 1 As shown, the method for separating, enriching and recovering indium from a low-concentration indium sulfate solution comprises: first extracting the low-concentration indium sulfate solution with P204, and then back-extracting it with hydrochloric acid to obtain an indium chloride back-extraction solution; The obtained indium chloride back-extraction solution is then extracted with TBP, back-extracted with dilute sulfuric acid to obtain a high-concentration indium sulfate solution, and finally the high-concentration indium sulfate solution is replaced by metal to obtain sponge indium.
[0038] The specific steps are:
[0039] (1) P204 extraction: First, mix P204 and sulfonated kerosene at a volume ratio of 30:70 to obtain an organic phase, then mix the low-concentration indium sulfate solution and the organic phase at a volume ratio of 2:1 and add them to a box-type mixing and settling tank Four-stage counter-current extraction was carried out in 45°...
Embodiment 3
[0045] Such as figure 1 As shown, the method for separating, enriching and recovering indium from a low-concentration indium sulfate solution comprises: first extracting the low-concentration indium sulfate solution with P204, and then back-extracting it with hydrochloric acid to obtain an indium chloride back-extraction solution; The obtained indium chloride back-extraction solution is then extracted with TBP, back-extracted with dilute sulfuric acid to obtain a high-concentration indium sulfate solution, and finally the high-concentration indium sulfate solution is replaced by metal to obtain sponge indium.
[0046] The specific steps are:
[0047] (1) P204 extraction: first mix P204 and sulfonated kerosene at a volume ratio of 25:75 to obtain an organic phase, then mix the low-concentration indium sulfate solution and the organic phase at a volume ratio of 2:1 and add them to a box-type mixing and settling tank Three-stage counter-current extraction was carried out in 40°...
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