Method for recovering nickel in solution

A technology for recovering solution and solution is applied in the extraction of nickel element in solution and in the field of nickel recovery in solution, which can solve the problems of unsatisfactory removal effect, etc., and achieve the effects of easy realization, good selectivity and simple process.

Inactive Publication Date: 2012-10-03
SHENYANG LIGONG UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] According to domestic and foreign literature and patents, there have been reports on the use of emulsion liquid membrane technology to extract nickel, but when the ion concentration of the external phase is high, the removal effect is not ideal.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0030] A method for recovering nickel in solution, comprising the following process steps:

[0031] (1) Milk making: In the milk making machine, according to the volume ratio, put in 5% of the surfactant Span85 (sorbitan trioleate, the relative molecular mass is 956.86), and the mobile carrier TBP (tributyl phosphate, molecular formula for C 12 h 27 o 4 P) 4%, liquid paraffin 1%, dissolved in film solvent kerosene, stirred at a speed of 500 r / min for 5 min; Add dropwise 1.5 mol / L of NH 3 ·H 2 O solution, after the dropwise addition is completed, stir for 20 minutes at a rotating speed of 5000 r / min to obtain a milky white emulsion, which is left to stand for 5 hours for use;

[0032](2) Extraction and separation: Pipette a certain amount of solution containing 300 mg / L nickel, put it in a stirring cup, and stir it at a speed of 400 r / min; 1) Add the white emulsion prepared in the mixing cup; after adding the emulsion, continue to stir for 15 min for extraction and separa...

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PUM

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Abstract

A method for recovering nickel in solution includes steps of adding 4-6% of surfactant Span85, 3-5% of flowing carrier TBP (tributyl phosphate), and 1% of liquid paraffin into an emulsifying device to dissolve in membrane solvent kerosene, mixing at the speed of 500r / min for five minutes, dropwise adding 1-2mol / L NH3*H2O solution into the emulsifying device at the speed of 10-20mL / min according to an oil-inner ratio of 1:1, stirring at the speed of 4000-6000r / min for 15-20 minutes to obtain milk white emulsion, and allowing the emulsion to stand in a set time for standby; transferring a certain amount of 100-500mg / L into a mixing cup, stirring at the speed of 200-400r / min, adding product of stirring into another mixing cup according to an emulsion-water ratio of 1:3 to 1:5, stirring for 10-15 minutes, performing extraction and separation, allowing solution to stand and layer, and separating out emulsion for standby after 30 minutes; and subjecting the emulsion to combined heating-centrifugal demulsification to separate oil phase and water phase, and performing cyclic emulsification to recover rich nickel in the water phase. Emulsion liquid membranes obtained by the method are highly stable, nickel ion selectivity is high, and the method is simple.

Description

technical field [0001] The invention relates to the extraction technology of nickel element in the solution. It is to establish an emulsion liquid film to recover the nickel in the solution, so as to achieve the purpose of wastewater treatment and nickel recovery. It particularly relates to a method for recovering nickel in the solution, which belongs to the environmental chemical industry field. Background technique [0002] A large amount of nickel-containing wastewater is produced in the production process of nickel products, including electroplating, stainless steel production, printed circuit board and other electronic product production, battery production and other industries. The nickel concentration of these wastewater ranges from 100-1000mg / L. Nickel pollution belongs to heavy metal pollution, which has the characteristics of long-term, cumulative, latent and irreversible, with great harm and high treatment cost. If nickel-containing wastewater is discharged direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C02F9/10
CPCY02P10/20
Inventor 卢旭东窦亚丽姜承志
Owner SHENYANG LIGONG UNIV
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