Method for separating nitrate from high-concentration nickel sulfate solution
A technology of sulfuric acid solution and nitrate, which is applied in the direction of nickel sulfate, nitric acid, chemical instruments and methods, etc., can solve problems such as nitrate separation, achieve the effect of increasing the content, increasing the utilization rate, and avoiding a large amount of waste water
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Embodiment 1
[0024] The composition (g / l) of high-concentration nickel sulfate solution is shown in Table 1:
[0025]
[0026] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:
[0027] (a) Resin adsorbs nitrate in high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed through the resin column after the last analysis, with a flow rate of 1.5BV / h; after adsorption, Ni101.5g / l in high-concentration nickel sulfate solution is obtained , NO 3 - 0.0035g / l. When the nitrate content in the adsorbed liquid is 0.098g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.
[0028] (b) Sulfuric acid solution analysis: first use 10BV of sulfuric acid solution after the nitrate content of the previous production output is less than 2g / l with a concentration of 15% (mass concentration) for analysis, and then use 15% new sulfuric acid 5BV for analysis to analyze the ...
Embodiment 2
[0031] The composition (g / l) of high-concentration nickel sulfate solution is shown in Table 2:
[0032]
[0033] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:
[0034] a) Resin adsorption of nitrate in the high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed by the resin column after the last analysis, and the flow rate is 2.0BV / h; Ni99.35g / l, Ni99.35g / l, NO 3 - 0.004g / l. When the nitrate content in the adsorbed liquid is 0.10g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.
[0035] b) Sulfuric acid solution analysis: first use 7BV of the sulfuric acid solution with a nitrate content of less than 2g / l and a concentration of 20% from the previous production for analysis, and then use 5BV of 20% new sulfuric acid for analysis, and the total acid content of the analysis is 12BV; The nitrate content in the after liquor was redu...
Embodiment 3
[0038] The composition (g / l) of the high-concentration nickel sulfate solution is shown in Table 3.
[0039]
[0040] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:
[0041]a) Resin adsorption of nitrate in the high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed by the resin column after the last analysis, and the flow rate is 2.2BV / h; Ni90.43g / l, Ni90.43g / l, NO 3 - 0.0022g / l. When the nitrate content in the adsorbed liquid is 0.089g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.
[0042] b) Sulfuric acid solution analysis: first use 5BV of sulfuric acid solution with nitrate content less than 2g / l and concentration of 20% from the previous production for analysis, and then analyze with 6BV of 20% new sulfuric acid, and analyze the total acid content of 11BV; The nitrate content in the after liquor was reduced from 14.63g / l ...
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