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A kind of composite ionic liquid gold leaching agent and gold leaching method

A technology of ionic liquid and gold leaching agent, applied in the field of gold leaching agent and gold leaching, can solve the problem that there is not much research on ionic liquid extraction of elemental gold, and achieve the effects of low price, reduced cost and low overall energy consumption

Active Publication Date: 2021-10-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Ionic liquids have been deeply studied and widely used in the extraction of metal ions, but there is not much research on the extraction of elemental gold by ionic liquids.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1-butyl-3-methylimidazolium chloride salt, sodium dichloroisocyanurate and water prepare compound ionic liquid according to the amount of substance 1:0.2:30, get 3g 1-butyl-3-methylimidazolium chloride salt , 0.75g of sodium dichloroisocyanurate and 9.3ml of water were mixed evenly at room temperature to obtain 10.8ml of solution, and 0.003g of gold powder was added to continue stirring. The gold powder was completely dissolved in 5 minutes, and the Au concentration of the solution was measured by atomic absorption spectrometer to be 277.8ug / ml , Calculate the rate of melting gold to be 100%.

Embodiment 2

[0038] 1-butyl-3-methylimidazolium chloride salt, sodium dichloroisocyanurate and water prepare compound ionic liquid according to the amount of substance 1:0.2:10, get 3g 1-butyl-3-methylimidazolium chloride salt , 0.75g of sodium dichloroisocyanurate and 3.1ml of water were mixed evenly at room temperature to obtain 4.6ml of solution, and 0.003g of gold powder was added to continue stirring. After 4 minutes, the gold powder was completely dissolved, and the Au concentration of the solution was measured by atomic absorption spectrometer to be 652.2ug / ml , Calculate the rate of melting gold to be 100%.

Embodiment 3

[0040] 1-butyl-3-methylimidazolium chloride salt, sodium dichloroisocyanurate and water prepare compound ionic liquid according to the amount of substance 1:0.1:30, get 3g 1-butyl-3-methylimidazolium chloride salt , 0.38g of sodium dichloroisocyanurate and 9.3ml of water were mixed uniformly at room temperature to obtain 10.8ml of solution, and 0.003g of gold powder was added to continue stirring. The gold powder was completely dissolved in 5 minutes, and the Au concentration of the solution was measured by atomic absorption spectrometer to be 277.1ug / ml , The calculated rate of gold dissolution is 99.8%.

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Abstract

The invention discloses a compound ionic liquid gold leaching agent and a gold leaching method. The compound ionic liquid gold leaching agent is made by mixing ionic liquid, water and sodium dichloroisocyanurate according to the ratio of substances 1:10-100:0.01-1; the ionic liquid is 1-butyl ‑3‑Methylimidazolium chloride, tributylmethylammonium chloride, or tetrabutylphosphine chloride. The invention provides a method for leaching gold based on the compound ionic liquid gold leaching agent, the gold leaching method comprising: (1) preparing a compound ionic liquid gold leaching agent; (2) preparing a gold-containing sample Add the compound ionic liquid gold leaching agent obtained in step 1), and fully stir to make gold leaching. The compound ionic liquid gold leaching agent of the invention can be used for leaching gold. The gold leaching agent is environmentally friendly, has low use cost, mild gold leaching conditions, fast speed and high extraction rate. The gold immersion method has the characteristics of high efficiency, environmental protection and sustainability.

Description

(1) Technical field [0001] The invention relates to a gold leaching agent and a gold leaching method. (2) Background technology [0002] Since ancient times, gold has played a very important role in life as currency and jewelry. In modern society, gold is widely used in modern technology and industrial fields because of its unique physical and chemical properties, such as supporting metals for catalyzing reactions such as acetylene hydrochlorination, and can also be used in food safety testing. an indispensable strategic resource. [0003] In nature, gold is commonly found in ores. Gold smelting methods can be roughly divided into two categories: physical metallurgy and chemical metallurgy. However, physical metallurgy is only suitable for high-grade ores, and the extraction efficiency is low. At present, the ore grade is generally low, and there are many refractory gold ores, and the methods of gold smelting are mainly chemical methods. The more mature chemical methods i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/16C22B7/00C22B11/00
CPCC22B3/1691C22B7/006C22B11/04Y02P10/20
Inventor 丰枫芮佳瑶李小年孙嫣霞赵佳刘佳媚郭伶伶张群峰许孝良卢春山
Owner ZHEJIANG UNIV OF TECH
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