Polymer reversed phase bonding extraction column and method for extracting gold from alkaline cyanide solution using the column

A reversed-phase bonding, solid-phase extraction column technology, applied in the direction of chemical instruments and methods, other chemical processes, and process efficiency improvement, can solve the problems of narrow pH range and easy failure of working materials, and achieve a wide pH range, The effect of improving extraction efficiency

Inactive Publication Date: 2009-11-25
YUXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reverse-phase solid-phase extraction column of the prior art extracts gold from alkaline cyanide solution. Because the pH range used by its reverse-phase bonded silica gel material is relatively narrow, the working material is easily invalidated in alkaline solution. Therefore, from alkaline It is impossible to extract gold from cyanide solution

Method used

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  • Polymer reversed phase bonding extraction column and method for extracting gold from alkaline cyanide solution using the column
  • Polymer reversed phase bonding extraction column and method for extracting gold from alkaline cyanide solution using the column
  • Polymer reversed phase bonding extraction column and method for extracting gold from alkaline cyanide solution using the column

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Embodiment 1

[0027] The polymer reverse-phase bonded solid-phase extraction column packing is polystyrene matrix, and the carbon atom number is C 2 、C 4 、C 8 、C 18 、C 22 Any of the alkyl groups. The solid phase extraction column has a diameter of 8 mm and a column length of 10 mm. It is first activated with ethanol, and then washed with water to remove the ethanol, which can be used for gold extraction. The preparation concentration is 1.0×10 -5 ~2.0×10 -4 KAu(CN) between mol / L 2 Solution, adjust its pH at 10.4, and add CTMAB according to the ratio of CTMAB:Au(I) molar ratio of 1:2, and this solution is used as the liquid to be extracted. When extracting, the extract is transported into the extraction column by the pump, and the volume of the extract is 2.5L to enter the saturated state. The eluent ethanol is delivered 5mL, and the activation solution ethanol is 10mL. The extraction column is eluted and activated in reverse, and then the The pump sends water to wash away the residu...

Embodiment 2

[0029] The polymer reverse-phase bonded solid-phase extraction column packing is polydivinyl phenyl, and the carbon atom number is C 2 、C 4 、C 8 、C 18 、C 22 Any of the alkyl groups. The solid phase extraction column is 16mm in diameter x 20mm in column length, and is filled with 4.1g of packing material. Activated with ethanol first, then washed with water to remove ethanol and then used for gold extraction. The preparation concentration is 2.0×10 -5 mol / L of KAu(CN) 2solution, adjust its pH at 11.8, and add CTMAB according to the ratio of CTMAB:Au(I) molar ratio of 1:1.5, and this solution is used as the liquid to be extracted. When extracting, the extract is transported into the extraction column by the pump, and the volume of the extract is 10L to enter the saturated state, and the eluent ethanol 25mL, the activation solution ethanol 25mL, the extraction column is eluted and activated in reverse, and then the pump Send water to wash off residual ethanol on the colum...

Embodiment 3

[0031] Polymer reversed-phase bonded solid-phase extraction column filler is polystyrene-divinylphenyl cross-linked polymer matrix bonded with carbon atom number C 2 、C 4 、C 8 、C 18 、C 22 Any of the alkyl groups. The solid-phase extraction column is 40mm in diameter x 50mm in column length, and packed with 63.5g of filler; it is first activated with ethanol, and then washed with water to remove the ethanol, which can be used for gold extraction. The preparation concentration is 5.0×10 -5 mol / L of KAu(CN) 2 solution, adjust its pH at 12.4, and add CTMAB according to the ratio of CTMAB:Au(I) molar ratio of 1:1.5, and this solution is used as the liquid to be extracted. When extracting, the extract is transported into the extraction column by the pump, and the volume of the extract is 40L to enter the saturated state. The eluent ethanol is transported 200mL, and the activation solution ethanol is 100mL. The extraction column is eluted and activated in reverse, and then the ...

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Abstract

The invention relates to a polymer reversed phase bonding extraction column and method for extracting gold from alkaline cyanide solution using the column. high polymers are polymer reversed phase bonding materials formed by bonding alkyl group on substrate surface as solid phase extraction column stuffing. The alkaline cyanide solution is added with quaternary ammonium anion CTMAB according to the molar ratios of quaternary ammonium cation with gold and Au as 1:1 and 3:1 to make into working solution; the working solution pH can be adjusted for 9.4-14; the working solution can be conveyed by a pump through the polymer reversed phase bonding solid phase extraction column, the gold ion association compound generated by the gold cyanogen complex anion and the quaternary ammonium anion CTMAB in the working solution can be adsorbed by the extraction column; after the adsorption reaches to the saturation state, the gold ion association compound enriched on the extraction column can be desorbed by alcohol elutriant after the adsorption reaches to the saturation state. The invention adopts the polymer reversed phase bonding material to stuff the extraction column, compared to the bonding silica gel, the applicable pH range of the stuffing is wide, under the alkaline condition, the using is stabilized, the invention is suitable for the working environment for extracting gold from the alkaline cyanide solution, the gold extraction efficiency can be improved greatly, the gold once extraction rate can be exceeded for 95%, the enriching times can be as high as 200-500 times, the gold extraction capacity is more than 16 mg/g.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a polymer reverse-phase bonded extraction column and a method for extracting gold from alkaline cyanide solution using the column. Background technique [0002] The cyanidation method is an economical and simple method for extracting gold from ores, concentrates or tailings. It has a series of advantages such as low cost, high gold recovery rate, and strong adaptability to ores, so it is still in the domestic market so far. Dominant among foreign gold extraction methods. At present, the traditional zinc powder replacement method or activated carbon adsorption is mostly used in the treatment process of gold enrichment from cyanidation leachate. Since the selectivity of these two methods to gold is not high enough, the obtained gold mud (intermediate product) still needs to undergo more complex follow-up refining treatment, resulting in long production cycle, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C08L25/06C08L25/02C08L25/08C08F8/02C22B3/24C22B11/08
CPCY02P10/20
Inventor 胡秋芬徐祎然黄齐林李银科杨光宇
Owner YUXI NORMAL UNIV
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