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Process for efficiently enriching and recovering precious metals platinum and palladium by using solvent extraction method

一种贵金属、萃取法的技术，应用在溶剂萃取体系领域，能够解决影响贵金属萃取回收、回收过程复杂、易污染环境等问题，达到萃取富集效果好、工艺简单、操作过程简单的效果

Active Publication Date: 2014-08-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the solvent extraction process, due to the complexity of the components contained in waste resources, the separation and enrichment of precious metals and base metals has always been a relatively cumbersome process. The existence of base metals often affects the extraction and recovery of precious metals, resulting in complex recovery processes and energy Disadvantages such as high energy consumption, easy to pollute the environment, high efficiency and low cost

Method used

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  • Process for efficiently enriching and recovering precious metals platinum and palladium by using solvent extraction method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] 1. Prepare working fluids with platinum and palladium concentrations of 25 mg / L each, and working fluids with nickel, copper, iron, aluminum, and manganese concentrations of 400 mg / L;

[0028] Stir magnetically in a constant temperature water bath at 35°C, dissolve 2-methoxyphenylthiourea with 2.5mol / L HCl solution, the mass fraction of 2-methoxyphenylthiourea is 0.05%, and obtain 0.05% 2-methoxyphenylthiourea phenylthiourea-hydrochloric acid solution;

[0029] 2. Preparation of aqueous phase stock solution:

[0030] In the experiment, 25ml of water phase was used for each group of extraction experiments, and one group was taken as an example to prepare as follows:

[0031] Take 1ml each of the prepared platinum, palladium, nickel, copper, iron, aluminum, and manganese working solutions with a pipette gun, and 10ml of 0.05% 2-methoxyphenylthiourea-hydrochloric acid solution, and adjust the acidity ([H + ]) is 3mol / L, obtain the aqueous phase stoste of volume 25ml, sha...

example 2

[0041] 1. Prepare working solutions with platinum and palladium concentrations of 50 mg / L each, and working solutions with nickel, copper, iron, tin, aluminum, manganese and lead concentrations of 1000 mg / L;

[0042] Stir magnetically in a constant temperature water bath at 40°C, dissolve 2-methoxyphenylthiourea with 6mol / L HCl solution, the mass fraction of 2-methoxyphenylthiourea is 0.2%, and obtain 0.2% 2-methoxy Phenylthiourea-hydrochloric acid solution;

[0043] 2. Preparation of aqueous phase stock solution:

[0044] In the experiment, 25ml of water phase was used for each group of extraction experiments, and one group was taken as an example to prepare as follows:

[0045] Use a pipette gun to take 1ml each of the prepared platinum, palladium, nickel, copper, iron, lead, aluminum, manganese, and tin working solutions, and 10ml of 0.2% 2-methoxyphenylthiourea-hydrochloric acid solution to adjust the acidity ([H + ]) is 4mol / L, obtain the aqueous phase stoste of volume...

example 3

[0055] 1. Prepare working solutions with platinum and palladium concentrations of 50 mg / L each, and working solutions with nickel, copper, iron, tin, aluminum, manganese and lead concentrations of 1000 mg / L;

[0056]Stir magnetically in a constant temperature water bath at 50°C, dissolve 2-methoxyphenylthiourea with 6mol / L HCl solution, the mass fraction of 2-methoxyphenylthiourea is 0.5%, and obtain 0.5% 2-methoxy Phenylthiourea-hydrochloric acid solution;

[0057] 2. Preparation of aqueous phase stock solution:

[0058] In the experiment, 25ml of water phase was used for each group of extraction experiments, and one group was taken as an example to prepare as follows:

[0059] Use a pipette gun to take 1ml each of the prepared platinum, palladium, nickel, copper, iron, lead, aluminum, tin, and manganese working solutions, and 10ml of 0.5% 2-methoxyphenylthiourea-hydrochloric acid solution to adjust the acidity ([H + ]) is 4mol / L, obtain the aqueous phase stoste of volume ...

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Abstract

The invention relates to a process for efficiently enriching and recovering precious metals platinum and palladium by using a solvent extraction method. The process is implemented by taking isoamylol as an extraction agent and 2-thiourea as an extracting and complexing aid. By virtue of adding 2-thiourea into an aqueous phase to act with platinum and palladium and extracting isoamylol as an extraction agent into an organic phase, a purpose that precious metals and base metals are separated and extracted and precious metals platinum and palladium are enriched is achieved. According to the invention, the separation of precious metals and base metals can be realized, thereby improving the enrichment and recovery rates of precious metals platinum and palladium; used reagents are low in cost, so that the process has a small impact on the environment; the process is simple in flow; the process is a new efficient extraction and enrichment system for precious metals.

Description

technical field [0001] The invention relates to a solvent extraction system for enriching and recovering precious metals platinum and palladium, which uses a solvent extraction method to separate and extract platinum and palladium precious metals from other base metals to achieve the purpose of enriching and recovering precious metals platinum and palladium, which belongs to resource recovery technology field. Background technique [0002] With the development of economy and progress of society, people's demand for precious metals is increasing. Precious metals, especially platinum group metals, are more and more widely used in various fields such as petrochemical industry, exhaust gas purification, and electronic technology. Platinum group metals are scarce in the earth's crust, but in some waste resources containing precious metals, such as waste electronic components, etc., there are considerable amounts of platinum and palladium precious metals. The recovery of preciou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/26
CPCC22B11/04C22B3/262C22B3/282C22B3/34Y02P10/20C22B3/22C22B3/44
Inventor 席晓丽聂祚仁孙晓凯马立文宋姗姗张力文
Owner BEIJING UNIV OF TECH
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