A kind of processing method of hydrazine hydrate liquid phase reduction silver powder waste liquid
A treatment method and technology of hydrazine hydrate, which are applied in the direction of reduced water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of inability to achieve re-discharge and incomplete treatment of hydrazine hydrate liquid-phase reduction silver powder waste liquid. and other problems, to achieve the effect of reducing emissions and good treatment effect
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Embodiment 1
[0029] Step 1, adding activated carbon to the waste liquid of hydrazine hydrate liquid phase reduction of silver powder, stirring evenly and standing at 30°C for 30 minutes, then filtering, collecting the first filtrate and the first filter residue;
[0030] Step 2, adding a nickel catalyst to the first filtrate obtained in step 1, stirring and reacting at 40° C. for 40 minutes to obtain a first intermediate mixed solution;
[0031] Step 3, using a stripping method to remove NH4+ in the first intermediate mixed solution to obtain a second intermediate mixed solution;
[0032] Step 4, adding hydrochloric acid to the second intermediate mixture, adjusting the pH value to 5-6, then adding tannin, stirring evenly and standing at 30°C for 30 minutes, to obtain a silver content of less than 0.1mg / l the third intermediate mixture;
[0033] Step 5, adding sodium hydroxide to the third intermediate mixed solution to adjust the pH value to 6.5-7.5 to obtain recycled water.
[0034] Th...
Embodiment 2
[0036] Step 1, adding activated carbon to the waste liquid of hydrazine hydrate liquid-phase reduction of silver powder, stirring evenly and standing at 40°C for 20 minutes, then filtering, collecting the first filtrate and the first filter residue;
[0037] Step 2, adding a nickel catalyst to the first filtrate obtained in step 1, stirring and reacting at 30° C. for 30 minutes to obtain a first intermediate mixture;
[0038] Step 3, using a stripping method to remove NH4+ in the first intermediate mixed solution to obtain a second intermediate mixed solution;
[0039] Step 4, adding hydrochloric acid to the second intermediate mixture, adjusting the pH value to 5-6, then adding tannin, stirring evenly and standing at 40°C for 20 minutes, to obtain the second mixture with a silver content of less than 0.1 mg / l. Three intermediate mixtures;
[0040] Step 5, adding sodium hydroxide to the third intermediate mixed solution to adjust the pH value to 6.5-7.5 to obtain recycled wat...
Embodiment 3
[0043] Step 1, adding activated carbon to the waste liquid of hydrazine hydrate liquid phase reduction of silver powder, stirring evenly and standing at 30°C for 40 minutes, then filtering, collecting the first filtrate and the first filter residue;
[0044] Step 2, adding a nickel catalyst to the first filtrate obtained in step 1, stirring and reacting at 60° C. for 30 minutes, to obtain a first intermediate mixture;
[0045] Step 3, using a stripping method to remove NH4+ in the first intermediate mixed solution to obtain a second intermediate mixed solution;
[0046] Step 4, adding hydrochloric acid to the second intermediate mixture, adjusting the pH value to 5-6, then adding tannin, stirring evenly and standing at 30°C for 40 minutes to obtain the second mixture with a silver content of less than 0.1 mg / l. Three intermediate mixtures;
[0047] Step 5, adding sodium hydroxide to the third intermediate mixed solution to adjust the pH value to 6.5-7.5 to obtain recycled wat...
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