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Method for measuring optimum extraction condition of metal extractant

An extraction agent and extraction technology, applied in the field of chemical engineering, can solve the problems of high cost and long time consumption, achieve the effect of simple operation and avoid range limitation

Active Publication Date: 2014-05-28
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a method for determining the optimal extraction conditions of metal extractants to solve the technical problems of long time consumption and high cost in the process of determining the optimal extraction conditions of metal extractants in the prior art

Method used

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  • Method for measuring optimum extraction condition of metal extractant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Preparation of Microdispersed Droplet Emulsion

[0040] Dissolve trioctylamine in dodecane diluent to obtain 70×10 -4 mol / L trioctylamine organic phase, the trioctylamine organic phase was mixed with methanol, ethanol, propanol and acetone at a mass ratio of 3:1000, and ultrasonically degassed for 5 minutes to form a homogeneous dispersive solvent. then use figure 1 The membrane dispersing equipment shown in 2 injects the dispersing solvent rapidly into the sodium chloride solution with a concentration of 0.1mmol / L to form a microdispersed droplet emulsion, and the pH of the emulsion is adjusted to 4.0 by NaOH and HCl.

[0041] 2) Determination of surface potential of microdispersed droplet emulsion

[0042] Wash the parts in contact with the emulsion, such as electrodes, sealing rings, and electrodes, three times with deionized water and ethanol, and dry them naturally for later use. Assemble the cleaned parts into a standard electric pool, inject the emulsion to...

Embodiment 2

[0048] 1) Preparation of Microdispersed Droplet Emulsion

[0049] The metal extractant butyl acetate was dissolved in n-octanol diluent to obtain a 1.5 mol / L butyl acetate organic phase. The organic phase of methanol and butyl acetate was mixed according to the mass percentage ratio of 1:100, and then ultrasonically degassed for 5 minutes to obtain a homogeneous dispersive solvent. Potassium chloride was dissolved in deionized water, and ultrasonic degassed for 5 minutes to obtain a potassium chloride solution with an ionic strength of 0.000001 mol / L.

[0050] Then use membrane dispersing equipment to quickly inject the dispersing solvent into the potassium chloride solution. Under the hydrophilic and hydrophobic effects of the solvent, the hydrophilic organic solvent will quickly dissolve in the inorganic salt solution, while the hydrophobic metal extractant will dissolve in the inorganic salt solution. Rapid precipitation in saline solution to form microdispersed droplet em...

Embodiment 3

[0058] 1) Preparation of Microdispersed Droplet Emulsion

[0059]The metal extractant trialkylphosphine oxide was dissolved in n-hexane diluent to obtain a 0.3 mol / L trialkylphosphine oxide organic phase. The acetonitrile and the trialkylphosphine oxide organic phase were mixed according to the ratio of 1:2000 by mass percentage to obtain a mixed liquid, and then ultrasonically degassed for 5 minutes to obtain a homogeneous dispersive solvent. Potassium chloride was dissolved in deionized water and ultrasonically degassed for 5 minutes to obtain a magnesium chloride solution with an ionic strength of 0.1 mol / L.

[0060] Then use membrane dispersing equipment to quickly inject the dispersing solvent into the potassium chloride solution. Under the hydrophilic and hydrophobic effects of the solvent, the hydrophilic organic solvent will quickly dissolve in the inorganic salt solution, while the hydrophobic metal extractant will dissolve in the inorganic salt solution. Rapid preci...

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Abstract

The invention discloses a method for measuring optimum extraction condition of a metal extractant, which comprises the following steps: preparing a micro-dispersed liquid drop emulsion by the metal extractant through a liquid-liquid micro-dispersion method; measuring the surface potential of the micro-dispersed liquid drop emulsion, and determining the optimum extraction condition according to the surface potential. A method for determining the optimum extraction condition comprises the following steps: S1, a group of experiments are performed, in the group of experiments, one specific extraction parameter in several extraction parameters is changed in each experiment, other extraction parameters are unchanged, and surface potential of each experiment is measured; S2, the surface potential values measured in each experiment in the group of experiments are compared, the lowest absolute value of the surface potential values in the experiment is taken for corresponding to the value of the specific extraction parameter, so that the optimum extraction condition is determined; and S3, the above steps are repeatedly carried out, and the optimum extraction condition can be respectively determined when the other extraction parameters are changed. The method provided in the invention is accurate and effective, and the problems of measuring range restriction and long preparation time while determining the optimum extraction efficiency condition in a traditional mode can be avoided.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method for determining the optimal extraction conditions of a metal extractant. Background technique [0002] Extraction refers to the use of the difference in solubility or distribution coefficient of the compound in two immiscible or slightly soluble solvents to transfer the compound from one solvent to another. After repeated extractions, most of the The method by which the compound is extracted. The ratio of the total amount of the extracted substance in the organic phase to the total amount of the extracted substance in the two phases is called the extraction rate. The volume of water is compared to the volume of the organic phase. Therefore the extraction rate is determined by the partition ratio and phase ratio. If it is relatively small, the method of continuous multiple extraction can be used to increase the extraction rate. With the same volume of ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
Inventor 吴勇韩科尹甜吴月芳夏婷婷
Owner CHNA ENERGY INVESTMENT CORP LTD
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