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Method for removing iron through solvent extraction

A technology for extraction and removal of iron and solvent, applied in the field of solvent extraction and removal of iron, can solve the problems of large acid-base consumption, difficulty in stripping, large loss of valuable metals, etc.

Active Publication Date: 2016-02-24
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for solvent extraction and iron removal in order to overcome technical problems such as the large loss of valuable metals in the existing extraction and iron removal method, the difficulty of stripping when recovering the organic phase, and the large consumption of acid and alkali.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0059] P227 extractant is dissolved in kerosene to prepare 0.5mol / L organic phase, and the aqueous phase contains Fe 3+ 1.03g / L, pH=2.1, in the case of unsaponified organic phase and water phase ratio of 1:4, the extraction temperature is 25 ℃, the time is 10min, the organic phase and the water phase are contacted twice to obtain 2.04 g / L loaded organic phase, the extraction rate is 99.03%; 3+ The organic phase was contacted twice at a temperature of 25°C, a time of 5 min, and a ratio (O / A) of 1:1, and the loaded Fe 3+ The organic phase extraction rate is 99.10%. Fe in the feed liquid under the experimental conditions 3+ Almost complete extraction, the stripping rate after extraction is also high, the organic phase can be recycled, and P227 extracts Fe 3+ It can be used in sulfuric acid system.

Embodiment 2

[0061] P227 extractant is dissolved in kerosene to prepare 0.5mol / L organic phase, and the aqueous phase contains Fe 3+ 5.17g / L, pH = 1.9, after the organic phase was saponified by potassium hydroxide 21%, the ratio of the organic phase to the aqueous phase was 1:1, the extraction temperature was 25°C, and the extraction time was 10 minutes. The organic phase was in contact with the aqueous phase for 1 Obtain the organic phase of 5.13g / L loading once, and extraction rate is 99.23%; 3+ The organic phase was contacted twice at a temperature of 25°C, a time of 5 min, and a ratio (O / A) of 1:1, and the loaded Fe 3+ The organic phase extraction rate is 99.17%. Fe in the feed liquid under the experimental conditions 3+ Almost complete extraction, the stripping rate after extraction is also high, and the organic phase can be recycled.

Embodiment 3

[0063] P227 extractant is dissolved in sulfonated kerosene to prepare 0.8mol / L organic phase, and the aqueous phase contains Fe 3+ 10.56g / L, pH = 2.2, the organic phase was saponified by sodium hydroxide 30% compared with the aqueous phase at a ratio of 1:1, the extraction temperature was 25°C, and the extraction time was 15 minutes. The organic phase was in contact with the aqueous phase for 1 Obtain the organic phase of 10.49g / L loading once, and extraction rate is 99.34%; 3+ The organic phase was contacted 3 times at a temperature of 25 °C for 5 min and a ratio (O / A) of 1:1 to load Fe 3+ The organic phase extraction rate is 99.31%. Fe in the feed liquid under the experimental conditions 3+ Almost complete extraction, the stripping rate after extraction is also high, the organic phase can be recycled, and P227 extracts Fe 3+ Can be used in hydrochloric acid system.

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Abstract

The invention discloses a method for removing iron through solvent extraction. The method for removing iron through solvent extraction, which is disclosed by the invention, contains the following step: contacting an organic phase with a water phase containing Fe<3+> to obtain an organic phase loaded with Fe<3+>, wherein the organic phase contains a compound shown in formula 1 and a diluent; and in the water phase, the concentration of the Fe<3+> is greater than or equal to 1.0g / L; and M is one or more of hydrogen, alkali metal ion and NH4<+>. The method is simple in process, good in the effect of removing iron through extraction, and not liable to emulsify; and moreover, the generated organic phase loaded with Fe<3+> can be reversely extracted under a low acidity, so as to be cyclically utilized. The method is high in efficiency, low in cost, convenient to use, and environment-friendly, and has potential to realize industrialized application.

Description

technical field [0001] The invention relates to a method for removing iron by solvent extraction. Background technique [0002] Iron is the second most abundant metal element in the earth's crust, and it is widely distributed in nature. Almost all non-ferrous metal ores contain iron, which makes the iron content in the leaching solution often higher than the valuable metal content. Iron ions exist in various forms of hydrates under different pH conditions, and can coordinate with various ligands, which makes the whole extraction system extremely complex and greatly increases the production cost of separating valuable metals. Therefore, effective methods for iron removal from mineral leaching solutions have been widely concerned. [0003] At present, the main research methods of iron removal can be divided into two categories: precipitation method and extraction method. The precipitation method has obvious advantages under the conditions of lower iron content and low acidi...

Claims

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Application Information

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IPC IPC(8): C22B3/38
Inventor 肖吉昌杜若冰安华英陆人杰张婷殷武涛张素辉
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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