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A method for extracting metal ions by sugar precipitation-induced two-phase system

A metal ion and system technology, applied in the direction of liquid solution solvent extraction, process efficiency improvement, etc., can solve the problems of high polymer cost, difficult regeneration, equipment corrosion, etc.

Inactive Publication Date: 2011-11-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this system also has the problem of using a higher concentration of salt. The corrosion of equipment by a higher salt concentration is one of the difficulties that affect the widespread use of this extraction system.
[0006] Therefore, the present invention provides a method for extracting metal ions in a two-phase system induced by sugar precipitation, in order to solve the problem of using high-concentration strong electrolyte salts in the process of extracting metal ions in the existing phase-separation extraction method, which is easy to cause equipment corrosion, and the use of polymer The cost of polymer is high, and it is difficult to regenerate and reuse

Method used

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  • A method for extracting metal ions by sugar precipitation-induced two-phase system
  • A method for extracting metal ions by sugar precipitation-induced two-phase system
  • A method for extracting metal ions by sugar precipitation-induced two-phase system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve platinum metal chloride with 5mL of hydrochloric acid aqueous solution with a concentration of 2mol / L, the concentration of platinum ions is 100mg / L, add 10mL of pure acetonitrile, the volume ratio of acetonitrile and metal ion aqueous solution is 2:1, mix thoroughly, and then mix here Add 0.6 g of glucose to the solution, the concentration of glucose in the mixed solution is 40 g / L, control the temperature at 10° C., shake and mix fully. Centrifugal treatment is then carried out to obtain a two-phase system in which the upper and lower layers are mutually immiscible, clear and separated. The concentration of platinum was detected by spectrometry in the upper phase, and the extraction rate of platinum was 85.36%. Separate the upper phase loaded with platinum ions with a separatory funnel, and use a rotary evaporator to perform vacuum distillation to remove low-boiling acetonitrile. The pressure of the distillation operation is 0.05MPa, and the distillation temp...

Embodiment 2

[0033] Dissolve the palladium metal chloride with 5 mL of aqueous hydrochloric acid solution with a concentration of 3 mol / L, the concentration of palladium ions is 100 mg / L, add 15 mL of pure acetonitrile, the volume ratio of acetonitrile and metal ion aqueous solution is 3:1, and mix thoroughly. Then add 0.96g of maltose to the mixed solution, the concentration of maltose in the mixed solution is 48g / L, control the temperature at 5°C, shake and mix thoroughly. Then, centrifugation is performed to obtain a two-phase system in which the upper and lower layers are mutually immiscible and clear and separated. The upper phase was taken to detect the concentration of palladium by spectrometry, and the palladium extraction rate was 90.35%. Separate the upper phase loaded with palladium ions with a separatory funnel, and use a rotary evaporator to perform vacuum distillation to remove low-boiling acetonitrile. The pressure of the distillation operation is 0.02MPa, and the distillati...

Embodiment 3

[0035]Dissolve the platinum metal chloride in 5 mL of 1 mol / L hydrochloric acid aqueous solution, the platinum ion concentration is 100 mg / L, add 10 mL of pure acetonitrile, the volume ratio of acetonitrile and metal ion aqueous solution is 2:1, and mix thoroughly. Then add 0.75 g of galactose to the mixed solution, the concentration of galactose in the mixed solution is 50 g / L, control the temperature at 10° C., shake and mix thoroughly. Then, centrifugation is performed to obtain a two-phase system in which the upper and lower layers are mutually immiscible and clear and separated. The concentration of platinum was detected by spectrometry in the upper phase, and the extraction rate of platinum was 93.5%. Separate the upper phase loaded with platinum ions with a separatory funnel, and use a rotary evaporator to perform vacuum distillation to remove low-boiling acetonitrile. The pressure of the distillation operation is 0.01MPa, and the distillation temperature is 50°C. It c...

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Abstract

The invention relates to the field of metal ion extraction, in particular, the invention relates to a method for extracting metal ions in a two-phase system induced by glycolysis. The method comprises the following steps: 1) adding a water-miscible polar organic solvent into the aqueous solution containing the target metal ion to obtain a mixed solution; 2) adding sugar to the mixed solution in step 1), so that the sugar is mixed in the mixed solution The concentration in the solution is 40-150g / L, fully vibrating and mixing at 0°C-25°C to obtain a sugar-containing mixed solution; 3) centrifuging and phase-separating the sugar-containing mixed solution in step 2) to obtain an aqueous phase and an organic A two-layer liquid phase coexistence system; 4) take the organic phase in step 3), remove the polar organic solvent, and obtain the target metal ion. The advantage of the present invention is that, by using sugar instead of salt, a series of problems caused by too high salt concentration required by common phase separation extraction can be avoided.

Description

technical field [0001] The invention relates to the field of metal ion extraction, in particular, the invention relates to a method for extracting metal ions in a two-phase system induced by glycolysis. Background technique [0002] Solvent extraction is the most important method for the separation and purification of metal ions. At present, the two-phase extraction systems used for the extraction and separation of metal ions mainly include two categories: traditional organic solvent-water two-phase systems and phase separation extraction systems. The former is to artificially add another immiscible organic solution to the aqueous solution containing the target extract, and use the difference in the distribution coefficient of the target extract in two immiscible liquid phases to achieve its extraction and separation; phase separation The extraction method is generally to add a high concentration of strong electrolyte salt to the extraction system, and use the salting-out e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04C22B3/26
CPCY02P10/20
Inventor 黄焜张超刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI