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Method for removing nitrate from nickel copper cobalt sulfate solution

A sulfuric acid solution and sulfate technology, applied in nickel sulfate and other directions, can solve the problems such as difficulty in removing nitrate, and achieve the effects of saving equipment investment, low production cost, and good stripping effect.

Inactive Publication Date: 2019-06-21
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to provide a kind of method of removing nitrate in the nickel-copper-cobalt sulfate solution, to solve the problem that the nitrate in the nickel-copper-cobalt sulfate solution is difficult to remove

Method used

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  • Method for removing nitrate from nickel copper cobalt sulfate solution
  • Method for removing nitrate from nickel copper cobalt sulfate solution
  • Method for removing nitrate from nickel copper cobalt sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composition of the pre-extraction solution is shown in Table 1.

[0025]

[0026] The method of removing nitrate is as follows:

[0027] A, adjust the pH value: add sulfuric acid solution to adjust the pH value of the pre-extract solution to 1.0;

[0028] B. Extraction and removal of nitrate ions: use the extraction organic phase for extraction, the volume concentration of N235 in the extraction organic phase is 10%, the volume concentration of isooctyl alcohol is 5%, and the volume concentration of sulfonated kerosene is 85%. The ratio O / A is 1:1, single-stage countercurrent extraction is carried out, the phase mixing time is 2min, and the phase separation time is 5min. After extraction, a loaded organic phase containing nitrate ions and a raffinate containing sulfate are obtained respectively. The raffinate Composition is as shown in table 2;

[0029]

[0030] C. Washing: use sulfuric acid to wash the loaded organic phase, the concentration of sulfuric aci...

Embodiment 2

[0034] The composition of the pre-extraction solution is shown in Table 4.

[0035]

[0036] The method of removing nitrate is as follows:

[0037] A, adjust the pH value: add sulfuric acid solution to adjust the pH value of the pre-extract solution to 1.5;

[0038] B. Extraction and removal of nitrate ions: use the extraction organic phase for extraction, the volume concentration of N235 in the extraction organic phase is 15%, the volume concentration of isooctyl alcohol is 20%, and the volume concentration of sulfonated kerosene is 65%. Ratio O / A is 1.5:1, carries out 2 stages of countercurrent extraction, phase mixing time is 3min, phase separation time is 7min, obtains the loaded organic phase containing nitrate ion and the raffinate containing sulfate respectively after extraction, raffinate Composition is as shown in table 5;

[0039]

[0040] C. Washing: Use sulfuric acid to wash the loaded organic phase, the concentration of sulfuric acid for washing is 0.5mol / ...

Embodiment 3

[0044] The composition of the pre-extraction solution is shown in Table 7.

[0045]

[0046] The method of removing nitrate is as follows:

[0047] A, adjust the pH value: add sulfuric acid solution to adjust the pH value of the pre-extraction solution to 1.75;

[0048] B. Extraction and removal of nitrate ions: use the extraction organic phase for extraction, the volume concentration of N235 in the extraction organic phase is 25%, the volume concentration of isooctyl alcohol is 30%, and the volume concentration of sulfonated kerosene is 45%. Ratio O / A is 1.5:1, carry out 2 stages of countercurrent extraction, phase mixing time is 4min, phase separation time is 10min, after extraction, respectively obtain the loaded organic phase containing nitrate ions and the raffinate containing sulfate, the raffinate Composition is as shown in table 8;

[0049]

[0050] C. Washing: Use sulfuric acid to wash the loaded organic phase, the concentration of sulfuric acid for washing is...

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Abstract

The invention discloses a method for removing nitrate from a nickel copper cobalt sulfate solution, belongs to the technical field of nickel copper cobalt hydrometallurgy, and solves the problem thatthe nitrate in the nickel copper cobalt sulfate solution is difficult to remove. The method comprises the following steps: A, adjusting the pH value: adding a sulfuric acid solution for adjusting thepH value of the nickel copper cobalt sulfate solution to 1.0-2.0; B, extracting for removing nitrate ions: extracting by using an extracting organic phase to obtain a nitrate ion-containing supportedorganic phase and a sulfate-containing raffinate respectively, wherein an extractant in the extracting organic phase is N235. Selective extraction separation of the nitrate is achieved by using the N235, so that the nitrate ion removing rate is high, and the purity of the sulfate solution and the metal ion concentration can be maintained in the technological process.

Description

technical field [0001] The invention belongs to the technical field of nickel-copper-cobalt hydrometallurgy, and in particular relates to a method for removing nitrate in a nickel-copper-cobalt sulfate solution. Background technique [0002] In the non-ferrous metal nitric acid process wet smelting process, when the transformed product sulfate solution is used in the production of nickel sulfate crystalline salt products for electroplating, due to the residue of nitrate, the quality of the nickel sulfate product is unqualified, and the content of nitrate impurities in the product exceeds the standard. In production, how to effectively remove nitrate in sulfate solution is one of the technical difficulties. Metal nitrates are all soluble, so it is difficult to remove nitrate ions by precipitation. More possible ideas include distillation, crystallization purification, reverse osmosis, reaction method, anion exchange method, etc., but the above methods are all costly and diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10
Inventor 刘玉强张晗李娟李维舟郭金权王书友陈彩霞高晓婷郁洪波席海龙李全王钦马天飞路思阳张建玲
Owner JINCHUAN GROUP LIMITED
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