Method for separating palladium and copper from solution containing copper, cobalt and nickel by taking acylthiourea as extractant

A technology for acylthiourea and copper-cobalt-nickel-palladium, which is applied in the field of extraction and separation of palladium and copper, can solve the problems of difficult separation of noble and base metals, long processing time, complicated precipitation process, etc. The effect of short equilibration time and high enrichment

Inactive Publication Date: 2012-08-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic non-ferrous smelting process mainly processes and recycles anode slime with high precious metal content, and anode slime is difficult to separate and recover precious metals due to the low content of precious metals and the difficulty of separating noble and base metals.
The existing roasting, leaching, and precipitation processes are complex and take a long time to process. Therefore, many domestic nonferrous smelters contain a large amount of precious metals and rare elements.

Method used

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  • Method for separating palladium and copper from solution containing copper, cobalt and nickel by taking acylthiourea as extractant
  • Method for separating palladium and copper from solution containing copper, cobalt and nickel by taking acylthiourea as extractant
  • Method for separating palladium and copper from solution containing copper, cobalt and nickel by taking acylthiourea as extractant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Get the mixed material liquid (Pd) of the copper-cobalt-nickel-palladium of 10ml 2+ The concentration is 100mg / L, Cu 2+ The concentration is 100mg / L) in the extraction tank to adjust the acidity of the system to pH=1.5; add 1g of SUL-1 and paraffin solid (SUL-1 concentration 0.0083 mol / L) to maintain the system at A:O=4 : 1, in a water bath at 55°C, extract 2 times, each 10min (SUL-paraffin to Pd 2+ The extraction rate is stable and close to 99%); cooling, standing still, after the phase separation is completed, the organic phase loaded with palladium is mixed with a mixed aqueous solution of thiourea and hydrochloric acid (wherein the mass percentage of thiourea is 0.5%, and the concentration of hydrochloric acid is 0.5 mol · L -1 ) for back-extraction, control the back-extraction ratio to A:O=4:1, back-extract three times at 55°C, 10min each time; cool and separate the phases, and recycle the organic phase after back-extraction and elution for normal extraction. Th...

Embodiment 2

[0049] Get the mixed material liquid (Pd) of the copper-cobalt-nickel-palladium of 10ml 2+ The concentration is 200mg / L, Cu 2+ The concentration is 200mg / L), put it in the extraction tank, and adjust the acidity of the system to pH=2.0; add 2g of SUL-1 and paraffin solid extractant (in which the concentration of SUL-1 is 0.009 mol / L), so that the system is maintained at A :O=3:1, in a water bath at 60°C, the number of forward extraction stages is 2 times, each 10min; cooling, standing still, after the phase separation is completed, the organic phase loaded with palladium is mixed with a mixed aqueous solution of thiourea and hydrochloric acid (the mass percent of thiourea is 0.5%, the concentration of hydrochloric acid is 0.5 mol L -1 ) for back-extraction, the back-extraction ratio is A:O=3:1, back-extraction 3 times at 60°C, 10min each time; cooling and phase separation, the organic phase eluted by back-extraction is recycled for normal extraction. The concentration of Pd ...

Embodiment 3

[0053] Get the mixed material liquid (Pd) of the copper-cobalt-nickel-palladium of 10ml 2+ The concentration is 100mg / L, Cu 2+ The concentration is 100mg / L), put it in the extraction tank, and adjust the acidity of the system to pH=1.5; add 1g of SUL-2 and paraffin solid extractant (the concentration of SUL-2 is 0.0083mol / L), so that the system is maintained at A :O=3.5:1, in a water bath at 65°C, the forward extraction series is 2 times, each time 10min (SUL-2 paraffin to Pd 2+ The extraction rate is stable and close to 99%); cooling, standing still, after the phase separation is completed, the organic phase loaded with palladium is mixed with a mixed aqueous solution of thiourea and hydrochloric acid (wherein the mass percentage of thiourea is 0.8%, and the concentration of hydrochloric acid is 1 mol ·L -1 ) for back-extraction, the back-extraction ratio is A:O=3.5:1, back-extraction 3 times at 65°C, 10min each time; cooling and phase separation, the organic phase eluted b...

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Abstract

The invention discloses a method for separating palladium and copper from a solution containing copper, cobalt and nickel. The method employs acylthiourea as an extractant and melted wax as a diluent, Pd and Cu in the copper cobalt nickel palladium system can be selectively separated with a high recovery rate (the recovery rate of Pd and Cu can reach 99.9%) by controlling an acidity of copper cobalt nickel palladium system. According to the invention, the method for extracting palladium has the advantages of short balance time, high enrichment degree and fast phase-splitting; palladium and copper can be continuously extracted and separated from an acidic aqueous solution containing palladium at a time. The extractant enables a recycling use, and has small harm on environment, which has significant meaning for improving the recovery rate of non-ferrous smelting of the precious metals.

Description

technical field [0001] The invention relates to a method for extracting and separating palladium and copper from a copper-cobalt-nickel solution, in particular to a method for extracting and separating palladium and copper from a copper-cobalt-nickel solution by using an acylthiourea compound as an extractant. Background technique [0002] At present, the separation and enrichment method of platinum group metals is mainly solvent extraction method, and the extraction agents used for extraction and separation of platinum group metals include: oxygen-containing extractants (various ethers, ketones, isoamyl acetate, etc.), nitrogen-containing extractants (amines and quaternary ammonium salts, etc.), phosphorus-containing extractants (tributyl phosphate TBP, alkyl phosphine oxides and multifunctional phosphorus-containing extractants), sulfur-containing and double-coordinated organic extractants (sulfides, sulfoxides and their derivatives). [0003] In the traditional extractio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/34C22B11/00C22B15/00
CPCY02P10/20
Inventor 彭波张彰李晓梅巴林陈平马世泰
Owner NORTHWEST NORMAL UNIVERSITY
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