A method for extracting and removing iron from chloride mixed solution

A mixed solution, extraction and iron removal technology, which is applied in the field of chemical industry and extraction chemistry, can solve the problems of strong water solubility and corrosion, and achieve the effect of overcoming the three-phase problem and simple extraction and removal of iron

Active Publication Date: 2017-08-11
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acidic phosphate ester extractants are extremely effective for extracting Fe(III) from sulfuric acid system solutions (pH 3-4), but the problem of difficult iron stripping has not been well resolved
However, as we all know, TBP itself is highly water-soluble and corrosive, and the industrial application of TBP to extract and remove iron is rarely seen in the metallurgical field.

Method used

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  • A method for extracting and removing iron from chloride mixed solution
  • A method for extracting and removing iron from chloride mixed solution
  • A method for extracting and removing iron from chloride mixed solution

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] figure 1 It is a step flow chart of the method for extracting iron from a chloride mixed solution according to an embodiment of the present invention.

[0029] Reference figure 1 The steps of the method for extracting iron from the chloride mixed solution according to the embodiment of the present invention are as follows:

[0030] In step 110, an extraction organic phase is configured. The extraction organic phase includes a diluent and an extractant, and the extractant is acetamide and its derivatives.

[0031] In this embodiment, the extractant is N,N-bis(2-ethylhexyl)acetamide, and the diluent is sulfonated kerosene; and N,N-bis(2-ethylhexyl)acetamide and sulfonated kerosene The volume ratio is 3:7.

[0032] In step 120, the chloride mixed solution in this embodiment contains 0.5 mol·L -1 Fe 3+ 的HCl solution. The extraction organic phase is used to extract iron from the chloride mixed solution to obtain an iron-rich organic phase.

[0033] Specifically, the volume ratio (al...

Embodiment 2

[0038] In the description of Embodiment 2, the similarities to Embodiment 1 will not be repeated here, and only the differences from Embodiment 1 will be described. The difference between Example 2 and Example 1 is that in step 110, the extraction organic phase with different extractant concentrations is used for extraction, that is, N,N-bis(2-ethylhexyl)acetamide and sulfonated kerosene are adjusted. Different volume fractions. In step 120, the chloride mixed solution contains 0.5mol·L -1 Fe 3+ 的HCl solution, where H + The concentration is 3mol·L -1 . Refer to Example 1 for other steps. Table 2 shows the extraction effect of different extractant concentrations on iron.

[0039] Table 2

[0040] Extractant concentration / %2030405070 Iron extraction rate / %83.8599.8799.3199.4899.79

[0041] Table 2 shows that in the process of extracting iron from the chloride mixed solution according to the method of the present invention, the volume fraction of the extractant N,N-bis(2-ethyl...

Embodiment 3

[0043] The difference between embodiment 3 and embodiment 1 is that: in step 120, H in the chloride mixed solution + The concentration is 3mol·L -1 . Adjust the different comparisons and analyze the extraction efficiency of iron removal. The extraction efficiency is shown in Table 3.

[0044] table 3

[0045] compared to 1:1 2:1 3:1 5:1 10:1 Iron extraction rate / %77.4994.8798.4099.3399.70

[0046] From the data in Table 3, it can be seen that the extraction organic phase composed of 30% (V%) N,N-bis(2-ethylhexyl)acetamide and 70% (V%) sulfonated kerosene has a content of 0.5 mol·L -1 Fe 3+ And 3mol·L -1 Extracting iron from the HCl mixed solution of chloride can achieve a better extraction effect when the ratio is 1:1. In actual production, only multi-stage countercurrent extraction can meet the requirements for extraction effect; However, when the comparison is larger, the extraction effect will be more excellent, but the increase in the amount of extractant will increase th...

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Abstract

The invention discloses a method for removing iron from a mixed chloride solution through extraction. The method comprises the following steps: A, preparing an extracted organic phase, wherein the extracted organic phase comprises an attenuant and an extraction agent, and the extraction agent is acetamide and derivatives thereof; B, extracting iron from the mixed chloride solution by using the extracted organic phase to obtain an iron-rich organic phase. The method is wide in application range, and can extract iron from various mixed chloride solutions; meanwhile, available acidity and iron concentration are wider in range; reverse extraction can be realized only by deionized water or diluted acid, and is easy; the extraction agent is large in extraction capacity, and solves the problems that the three phase is formed because other extraction agents are small in extraction capacity, the demands on aqueous phase acidity is serious during extraction, and the acid concentration is high during reverse extraction. According to the method, the iron removal through extraction is simple, purification of chloride salt can be realized easily, and purposes of hydrochloric acid refining and iron recovery are realized.

Description

Technical field [0001] The invention belongs to the technical fields of extraction chemistry and chemical engineering, and specifically relates to a method for extracting and removing iron from a chloride mixed solution. Background technique [0002] Iron is one of the abundant elements in nature. Almost all non-ferrous metallurgical materials contain iron, and the content of iron is often higher than that of valuable metals. In the acid leaching process, iron and valuable metals enter the solution together, and the iron in the leaching solution must be removed as a harmful impurity. Purification and removal of iron is an important process in hydrometallurgy. At present, due to the depletion of non-ferrous metal mineral resources worldwide and the improvement of environmental standards, the mining and utilization of polymetallic composite ore and symbiotic ore make the problem of impurity removal more complicated, and the control of iron is particularly important. [0003] The t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/28
CPCY02P10/20
Inventor 时东李丽娟李晋峰宋富根姬连敏聂峰刘志启曾忠民李慧芳宋雪雪彭小五
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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