Method for separating iron and zinc in iron-containing waste acid
A separation method and technology of zinc ions, applied in separation methods, chemical instruments and methods, ion exchange of chelates, etc., can solve problems such as low recovery efficiency and complicated separation and recovery process, and achieve long cycle, simple process, The effect of resin elution and regeneration convenience
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Embodiment 1
[0042] A method for separating iron and zinc in iron-containing waste acid, comprising the steps of:
[0043] S1. Pretreatment: Take 1000mL of iron-containing waste acid to remove suspended solids and impurities in the iron-containing waste acid;
[0044] S2. Resin activation: wash and activate 1# resin and 2# resin;
[0045] S3. Adsorption of zinc: 1# resin and 2# resin columns are connected in series, and the iron-containing waste acid pretreated in S1 is sand-filtered and then pumped into the series-connected 1# resin column and 2# resin with a peristaltic pump at a rate of 2BV / h column, zinc ions are adsorbed by the resin, and the ferrous acid solution is collected at the outlet of the resin column;
[0046] S4. Analysis: Use 100mL of clear water to elute the zinc ions adsorbed by the saturated 1# resin column and 2# resin column with running water at a rate of 2BV / h to obtain a low-acidity zinc chloride solution.
[0047] The cross-linking degree of 1# resin column is 6%,...
Embodiment 2
[0054] A method for separating iron and zinc in iron-containing waste acid, comprising the steps of:
[0055] S1. Pretreatment: Take 600mL of iron-containing waste acid to remove suspended solids and impurities in the iron-containing waste acid;
[0056] S2. Resin activation: wash and activate 1# resin and 2# resin;
[0057] S3. Adsorption of zinc: 1# resin and 2# resin columns are connected in series, and the iron-containing waste acid pretreated in S1 is sand-filtered and then pumped into the series-connected 1# resin column and 2# at a rate of 1.5BV / h by a peristaltic pump Resin column, zinc ions are adsorbed by the resin, and ferrous acid solution is collected at the outlet of the resin column;
[0058] S4. Analysis: Use 150mL of clear water to elute the zinc ions adsorbed by the saturated 1# resin column and 2# resin column with flowing water at a rate of 2BV / h to obtain a low-acidity zinc chloride solution.
[0059] The cross-linking degree of 1# resin column is 5%, an...
Embodiment 3
[0066] A method for separating iron and zinc in iron-containing waste acid, comprising the steps of:
[0067] S1. Pretreatment: Take 200mL of iron-containing waste acid to remove suspended solids and impurities in the iron-containing waste acid;
[0068] S2. Resin activation: wash and activate 1# resin and 2# resin;
[0069] S3. Adsorption of zinc: 1# resin and 2# resin columns are connected in series, and the iron-containing waste acid pretreated in S1 is sand-filtered and then pumped into the series-connected 1# resin column and 2# resin with a peristaltic pump at a rate of 1BV / h column, zinc ions are adsorbed by the resin, and the ferrous acid solution is collected at the outlet of the resin column;
[0070] S4. Analysis: Use 150mL of clear water to elute the zinc ions adsorbed by the saturated 1# resin column and 2# resin column with flowing water at a rate of 2BV / h to obtain a low-acidity zinc chloride solution.
[0071] The cross-linking degree of 1# resin column is 5%...
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