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Application of extractant and method for extracting zinc from ammonia solution

An extraction agent and extraction technology, applied in the field of metallurgy, to achieve the effect of fast extraction speed and fast phase separation

Active Publication Date: 2010-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are very few reports on the research literature on extracting zinc from ammoniacal solutions. There are mainly Lix series extractants, wherein Lix54 is the best zinc extractant. The new extractants have β-diketone structure, but both Lix54 and HostarexDK-16 have disadvantages

Method used

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  • Application of extractant and method for extracting zinc from ammonia solution
  • Application of extractant and method for extracting zinc from ammonia solution
  • Application of extractant and method for extracting zinc from ammonia solution

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Experimental program
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Effect test

Embodiment 1

[0019] (1) The total concentration of ammonia and ammonium in the ammoniacal zinc-containing aqueous solution is 2.00mol L -1 , ammonia concentration 0.11mol L -1 , pH=8; its zinc content is: ①Zn-NH 3 -NH 4 HCO 3 -H 2 The concentration of zinc in O solution is 6.03g L -1 ; ②Zn-NH 3 -NH 4 Cl-H 2 The concentration of zinc in O solution is 6.18g L -1 ;③Zn-NH 3 -(NH 4 ) 2 SO 4 -H 2 The concentration of zinc in O solution is 5.95g L -1 .

[0020] (2) Extractant composition: 40% (volume ratio) 2-acetyl-3-oxo-dithiobutanoic acid-dodecyl ester, mixed with 55% sulfonated kerosene and 5% TBP to form an organic phase

[0021] (3) Extraction and stripping operating conditions: at normal temperature, the ammoniacal zinc-containing aqueous solution in (1) and the extractant in (2) are respectively carried out primary extraction by comparison A / O=1: 1, and the extraction time for 5 minutes; then use sulfuric acid to back-extract the zinc-containing extracted organic phase, an...

Embodiment 2

[0024] Zn-NH 3 -(NH 4 ) 2 SO 4 -H 2 O solution, in which the concentration of zinc is 11.20g L -1 , the total concentration of ammonia and ammonium is 3mol L -1 , ammonia concentration 1.00mol L -1 , pH=11. The organic phase was composed of 50% (by volume) 2-acetyl-3-oxo-dithiobutanoic acid-hexadecyl ester and 50% sulfonated kerosene. At normal temperature, carry out the primary extraction with the water phase according to the ratio A / O=2:1, and the extraction time is 5min; carry out the third stage according to the ratio A / O=1:1 for the sulfuric acid back-extraction of the extracted organic phase containing zinc Back extraction, the back extraction time is 3min. The primary extraction rate of zinc is ≥95%, the highest is 98.2%, the extraction distribution ratio is D≥19, the primary stripping of zinc is only 58.1%, and it can be as high as 97% after the tertiary stripping. The extraction and stripping phase separation is fast, the phase interface is clear, and there i...

Embodiment 3

[0026] Zn-NH 3 -(NH 4 ) 2 SO 4 -H 2 O solution, in which the concentration of zinc is 16.680g·L -1 , the total concentration of ammonia and ammonium is 2.13mol L -1 , ammonia concentration 0.24mol L -1, pH=9. Mix 60% (volume ratio) of 2-acetyl-3-oxo-dithiobutanoic acid-tetradecyl ester alkane with 36% sulfonated kerosene and 4% TBP to form the organic phase. At normal temperature, carry out primary extraction with the water phase according to the comparison A / O=2:1, the extraction time is 5min; The stripping time is 3min. The primary extraction rate of zinc is ≥ 97%, the highest is 99.12%, the extraction distribution ratio D is ≥ 32.3, the highest is 112.6; after the third back extraction, it can be as high as 97% or more; the extraction and back extraction phase separation is fast, the phase interface is clear, no Emulsification or third phase generation. After the three-stage circular extraction of zinc, the concentration of zinc in the back extraction water phase ...

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Abstract

The invention relates to application of an extractant and a method for extracting zinc from ammonia solution, which comprises the following steps: adopting novel efficient extractant 2-acetyl-3-oxo-alkyl dithiophosphate acid alkyl ester, thinner sulfonated kerosene and demulsifier tri-butyl-phosphate (TBP) to form an organic phase; extracting Zn (II) from the ammonia solution; adopting sulfuric acid for back extraction, so as to separate and concentrate Zn in the solution; and then converting zinc sulfate solution so as to regenerate the organic phase. The novel efficient synthetized extractant of the invention has the following characteristics that: 1) the extracant can extract Zn from the ammonia solution with low density in the wider range of the pH value to get the concentration of Zn; and 2) the extractant has quick extracting speed, quick phase separation, no emulsify and no a third phase, and can take the sulfuric to be as the back extracant. In all, the invention can effectively, quickly, cleanly separate and concentrate Zn in the ammonia solution, is free from waste water, waste residues and exhaust emission, and is an environmental-friendly zinc extractant and a zinc extractant method.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to the application of an extractant and a method for extracting zinc from an ammoniacal leaching solution of zinc oxide ore or zinc oxide materials. Background technique [0002] At present, sulfuric acid leaching-extraction-electrodeposition process is mainly used for zinc oxide ore, but for zinc oxide ore with high calcium and magnesium alkaline gangue, sulfuric acid leaching process has poor selectivity, high acid consumption, difficulty in liquid-solid separation and purification. Technical problems such as heavy burden removal. Therefore, this type of ore is only suitable for ammonia leaching. However, only the ammonium chloride system has been reported in the literature from the ammoniacal solution, but it has not yet been used in large-scale industrial applications, and the ammonium sulfate system and ammonium carbonate system have not been reported in the literature. . ...

Claims

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Application Information

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IPC IPC(8): C22B3/34C22B19/00
CPCY02P10/20
Inventor 何静黄玲金胜明杨声海唐谟堂杨建广唐朝波冯瑞姝鲁君乐陈永明罗超王小能王涛
Owner CENT SOUTH UNIV
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