Method for extracting gold from electronic wastes by using novel microemulsion
A technology of electronic waste and extraction method, which is applied in the field of new microemulsion to extract gold from electronic waste, and can solve problems such as lack of clear technical standards
Inactive Publication Date: 2014-06-25
周千里 +2
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Problems solved by technology
The rapid replacement of electronic products has brought serious problems - electronic waste, which has no clear technical standards to define, generally speaking, electronic products that have been discarded or can no longer be used are electronic waste
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Embodiment Construction
[0018] The invention is a novel microemulsion extraction method for gold in electronic waste, and each step is completed through the implementation of specific experiments.
[0019] First, the electronic waste is processed, and the components on the electronic waste are disassembled, such as capacitors, resistors, inductors, etc.; the circuit board is pre-shredded into fragments, and then the fragments are further crushed to separate metal and organic matter. e-waste drying.
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The invention relates to a method for extracting gold from electronic wastes by using a novel microemulsion. The method for extracting the gold from the electronic wastes comprises the steps of firstly, treating the electronic wastes, crushing, drying, adding aqua regia into the crushed and dried electronic wastes, then evaporating the aqua regia, adding hydrochloric acid for treatment, evaporating the hydrochloric acid solution, adding deionized water and filtering to obtain a Au(III) ion filtrate; dissolving [C14mim] Br into a mixed phase of cyclohexane and hexanol in a volume ratio of 7:3, then adding HCl for treatment, separating an organic phase from a hydrochloric acid aqueous phase to form the microemulsion, preparing a gold ion working solution of Au(III) ions and an HCl solution, mixing the gold ion working solution and the microemulsion, and extracting gold ions while oscillating. The invention provides a basis of applying a [C14mim] Br / cyclohexane / hexanol / hydrochloric acid microemulsion system to industrial gold extraction, so that the electronic wastes are treated, and noble metallic gold can be recycled.
Description
Technical field [0001] The invention relates to a method for extracting gold in electronic waste, in particular to a method for extracting gold in electronic waste by a novel microemulsion. Background technique [0002] We live in an era of rapid development of science and technology, and the development of all walks of life cannot do without the assistance of electronic products. The rapid replacement of electronic products has brought about a serious problem - electronic waste, which has no clear technical standards to define it. Generally speaking, electronic products that have been discarded or can no longer be used are electronic waste. For example: discarded TV sets, discarded old computers, old refrigerators, microwave ovens, discarded mobile phones, etc. When these electronic wastes are continuously generated, on the one hand, they contain a large amount of toxic and harmful substances, which seriously endanger human health; on the other hand, they contain a large a...
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Login to View More IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 周千里王子涵张擎昊
Owner 周千里