Method for treating tin-stripping waste liquid
A treatment method and waste liquid technology, which can be applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of low resource recovery rate, reduce environmental pollution, and improve recycling rate.
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Embodiment 1
[0053] Step 1: select tributyl phosphate with a mass fraction of 20% and sulfonated kerosene with a mass fraction of 80% as an extractant, extract the tin stripping waste liquid, and separate to obtain the first mixed liquid and dilute nitric acid;
[0054] Step 2: adding hydrogen peroxide and sodium hydroxide to the first mixed liquid, and after fully reacting, a solid-liquid mixture is obtained;
[0055] Step 3: performing solid-liquid separation on the solid-liquid mixture in step 2 on a filter press to obtain a second mixed liquid and precipitate;
[0056] Step 4: Perform electrolytic treatment on the second mixed solution, wherein the electrolysis temperature is 70°C, and the cathode current density is 1A.dm -2 , the anode current density is 3A.dm -2 , to get metal tin;
[0057] Step 5: immersing the precipitate in step 3 in a copper immersion solution to obtain an iron hydroxide precipitate and a copper-containing solution;
[0058] Step 6: Mix concentrated nitric aci...
Embodiment 2
[0060] Step 1: select tributyl phosphate with a mass fraction of 30% and sulfonated kerosene with a mass fraction of 70% as an extraction agent, extract the tin stripping waste liquid, and separate to obtain the first mixed liquid and dilute nitric acid;
[0061] Step 2: adding hydrogen peroxide and sodium hydroxide to the first mixed liquid, and after fully reacting, a solid-liquid mixture is obtained;
[0062] Step 3: performing solid-liquid separation on the solid-liquid mixture in step 2 on a centrifuge to obtain a second mixed liquid and precipitate;
[0063] Step 4: Perform electrolytic treatment on the second mixed solution, wherein the electrolysis temperature is 70°C, and the cathode current density is 1A.dm -2 , the anode current density is 3A.dm -2 , to get metal tin;
[0064] Step 5: immerse 0.8g of the precipitate in step 3 in 15g of copper immersion solution, separate and obtain 0.3g of iron hydroxide precipitate and 15.5g of copper-containing solution, and car...
Embodiment 3
[0067] Step 1: select tributyl phosphate with a mass fraction of 20% and sulfonated kerosene with a mass fraction of 80% as an extractant, extract the tin stripping waste liquid, and separate to obtain the first mixed liquid and dilute nitric acid;
[0068] Step 2: adding hydrogen peroxide and sodium hydroxide to the first mixed liquid, and after fully reacting, a solid-liquid mixture is obtained;
[0069] Step 3: performing solid-liquid separation on the solid-liquid mixture in step 2 on a sedimentation type solid-liquid separation device to obtain a second mixed liquid and precipitate;
[0070] Step 4: Perform electrolytic treatment on the second mixed solution, wherein the electrolysis temperature is 70°C, and the cathode current density is 1A.dm -2 , the anode current density is 3A.dm -2 , to get metal tin;
[0071] Step 5: immerse 0.8g of the precipitate in step 3 in 15g of copper immersion solution, separate and obtain 0.3g of iron hydroxide precipitate and 15.5g of co...
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