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
CN101584979AInactive Publication Date: 2009-11-25YUXI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YUXI NORMAL UNIV
Publication Date
2009-11-25
Estimated Expiration
Not applicable · inactive patent

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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.
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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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