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A method for removing chloride ions in copper sulfate solution

A copper sulfate solution, a technology for removing chlorine, applied in the chemical industry, can solve problems such as high cost and complicated operation

Active Publication Date: 2018-02-16
SHAANXI RUIKAI ENVIRONMENTAL PROTECTION & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In short, the existing technology for removing chloride ions in copper sulfate solution either has the limitation that it is only applicable to the concentration of chloride ions lower than 1g / L, or has problems such as high cost and complicated operation, so it is still necessary to develop Process route for removing chloride ions in concentrated copper sulfate solution

Method used

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  • A method for removing chloride ions in copper sulfate solution

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] 1) Take 4L of chlorine-containing copper sulfate solution, put it in a 5L beaker, check that the original solution contains Cu=55.65g / L, Cl=18.64g / L; weigh 110g of copper powder; weigh 4g of solid sodium sulfite.

[0033] 2) Put the beaker in a constant temperature water bath and raise the temperature to 80°C, start stirring and add the weighed sodium sulfite and copper powder, and stir for 2.5 hours;

[0034] 3) Take out the beaker from the water bath, let it cool down to room temperature naturally, and filter;

[0035] 4) Obtain 271g of white cuprous salt filter residue and 3800ml of sky-blue copper sulfate solution; the detected filtrate Cu=57.26g / L, Cl=800mg / L; the primary removal rate of chloride ions is 95.93%.

Embodiment 2

[0037] 1) Take 4L of chlorine-containing copper sulfate solution, put it in a 5L beaker, check that the original solution contains Cu=50.65g / L, Cl=4.7g / L; weigh 25g of copper powder; weigh 4g of solid sodium sulfite.

[0038] 2) Put the beaker in a constant temperature water bath and raise the temperature to 80°C, start stirring and add the weighed sodium sulfite and copper powder, and stir for 2.5 hours;

[0039] 3) Take out the beaker from the water bath, let it cool down to room temperature naturally, and filter;

[0040] 4) Obtain 64.6g of white cuprous salt filter residue and 3950ml of sky blue copper sulfate solution; the detected filtrate Cu=52.32g / L, Cl=27mg / L; the solution meets the needs of traditional electrodeposition copper solution, and can also prepare copper sulfate pentahydrate crystals.

Embodiment 3

[0042] 1) Take 4L of chlorine-containing copper sulfate solution, put it in a 5L beaker, and detect that the original solution contains Cu=27.44g / L, Cl=12.7g / L; weigh 75g of copper powder; weigh 4g of solid sodium sulfite.

[0043] 2) Put the beaker in a constant temperature water bath and raise the temperature to 80°C, start stirring and add the weighed sodium sulfite and copper powder, and stir for 2.5 hours;

[0044] 3) Take out the beaker from the water bath, let it cool down to room temperature naturally, and filter;

[0045] 4) Obtain 184.6g of white cuprous salt filter residue and 3920ml of sky blue copper sulfate solution; test filtrate Cu=31.26g / L, Cl=128mg / L; chloride ion removal rate is 99.01%.

[0046] Reuse of dechlorination slag:

[0047] 1) Collect a total of 500g of white cuprous salt wet slag, prepare 500ml mixed alkali slurry with sodium carbonate and caustic soda with a mass ratio of 2:1, add the cuprous salt wet slag into the mixed alkali slurry, and conti...

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Abstract

The invention relates to an economic method for removing chloride ions in a copper sulphate solution. The method comprises the following steps: adjusting a pH value and oxido reduction potential and adjusting copper sulphate with sodium carbonate and sodium sulfite to a reaction interval where Na2[CuCl3] can stable exist; carrying out heating, adding elemental copper powder, allowing Na2[CuCl3] in the solution and the elemental copper powder to undergo comproportionation so as to produce a white CuCl cuprous salt precipitate insoluble in water; and carrying out full cooling to separate cuprous salt sediment and the copper sulphate solution so as to obtain a dechlorinated copper sulphate solution. The method utilizes the characteristic that wet cuprous salt sediment is not stable under the condition of a high pH value to convert the wet cuprous salt sediment into dechlorinated copper residues consisting of CuO, CuCO3 and Cu(OH)2 and to return the dechlorinated copper residues into a system for reuse, and a produced sodium chloride solution has high concentration and can be directly used for evaporative preparation of industrial NaCl. The method is widely applicable to removal of chloride ions of various concentrations from high-concentration copper sulphate solutions; reagents added for reaction do not influence quality; except cost for heating, operation cost is negligible; and the method is economic and easily practicable.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for removing chloride ions in a copper sulfate solution. Background technique [0002] The invention belongs to the field of purification of electrowinning circulating liquid for copper-containing waste wet recovery of metal copper, and specifically relates to a method for removing chloride ions from a medium-high concentration copper sulfate solution, which is especially suitable for hydrometallurgical enterprises to process high-chloride ion copper-containing materials When leaching copper-containing minerals with chlorides, the product is a solution purification process for high-purity cathode copper or crystalline copper sulfate products. [0003] In the wet-process copper regeneration resource industry, the raw materials usually contain a certain concentration of chloride ions. In order to obtain a better product market positioning, cathode copper is usually the bes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B15/00
CPCY02P10/20
Inventor 卢正杰薛小军
Owner SHAANXI RUIKAI ENVIRONMENTAL PROTECTION & TECH CO LTD