Extraction method of platinum in high-concentration platinum solution

A high-concentration, solution-based technology, applied in the field of platinum metal extraction, can solve problems such as turbidity in the extraction system, inability to extract and separate platinum, and precipitation

Active Publication Date: 2013-12-25
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, in the platinum extraction system prepared by industrial extraction agents, the concentration of platinum waste liquid is generally around 10g/L or even lower. The reason is that if the concentration of platinum waste liquid is increased, the concentration of extraction associates formed during the extraction process will be high. , leading to turbidity of the extraction system, difficulty in phase separation, and serious precipitation, resulting in the inability to extract and separate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] Preparation of platinum solution: accurately weigh 40.00g of thermocouple platinum waste, put it into a beaker, add 200ml of aqua regia, aqua regia is made up of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1, cover with a watch glass, and place it on the hot plate. Heat to dissolve. After the waste is dissolved, open the watch glass, add 20ml concentrated hydrochloric acid to remove the nitric acid when it is concentrated to about 100ml volume, continue to concentrate to about 100ml volume, do so 4 times until no brownish-yellow gas is emitted. Continue to concentrate to a volume of about 50ml, add 10ml of deionized water to remove the hydrochloric acid, and continue to concentrate to a volume of about 50ml, so that the hydrochloric acid in the dissolved solution can be removed three times. Continue to concentrate until it is nearly dry, and dissolve it to a constant volume with a hydrochloric acid solution with a ...

Example Embodiment

[0027] Example 2

[0028] Preparation of platinum solution: accurately weigh 40.00g of thermocouple platinum waste, put it into a beaker, add 200ml of aqua regia, aqua regia is made up of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1, cover with a watch glass, and place it on the hot plate. Heat to dissolve. After the waste is dissolved, open the watch glass, add 20ml concentrated hydrochloric acid to remove the nitric acid when it is concentrated to about 100ml volume, continue to concentrate to about 100ml volume, do so 4 times until no brownish-yellow gas is emitted. Continue to concentrate to a volume of about 50ml, add 10ml of deionized water to remove the hydrochloric acid, and continue to concentrate to a volume of about 50ml, so that the hydrochloric acid in the dissolved solution can be removed three times. Continue to concentrate until it is nearly dry, and dissolve it to a constant volume with a hydrochloric acid solution with a ...

Example Embodiment

[0033] Example 3

[0034] Preparation of platinum solution: accurately weigh 40.00g of thermocouple platinum waste, put it into a beaker, add 200ml of aqua regia, aqua regia is made up of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1, cover with a watch glass, and place it on the hot plate. Heat to dissolve. After the waste is dissolved, open the watch glass, add 20ml concentrated hydrochloric acid to remove the nitric acid when it is concentrated to about 100ml volume, continue to concentrate to about 100ml volume, do so 4 times until no brownish-yellow gas is emitted. Continue to concentrate to a volume of about 50ml, add 10ml of deionized water to remove the hydrochloric acid, and continue to concentrate to a volume of about 50ml, so that the hydrochloric acid in the dissolved solution can be removed three times. Continue to concentrate until it is nearly dry, and dissolve it to a constant volume with a hydrochloric acid solution with a ...

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PUM

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Abstract

The invention relates to an extraction method of platinum in a high-concentration platinum solution. The method comprises the following steps of 1) diluting a high-concentration platinum waste dissolving solution with a hydrochloric acid solution with the concentration being 4mol/L; and 2) preparing the platinum solution on which the first-grade extraction is performed by an extraction agent in a dilution manner by taking normal octane as a diluent and N-normal-butyl valnoctamide as a solute and discharging a raffinate so as to obtain an extract containing the platinum. By utilizing the method, the concentration of the platinum in the material solution can be improved to 20g/L; the first-grade extraction rate E is greater than or equal to 99.5%; the technological process is reduced; and the treatment time is shortened. Thus, the method is efficient.

Description

technical field [0001] The invention relates to the field of platinum metal extraction, in particular to a method for extracting platinum in a high-concentration platinum solution. Background technique [0002] Platinum group metal elements are very rare in the earth's crust, and each ton of solid matter in the earth's crust contains a few tenths of grams to a few tenths of a few grams, the least of which is rhodium, etc., and each ton contains about 1×10 -3 grams, platinum content per ton contains about 5×10 -3 gram. Platinum and rhodium belong to the platinum group metals. Because of their high melting point, good electrical conductivity, corrosion resistance and high temperature stability, high temperature strength and high temperature creep ability, they become important materials for modern industry and national defense construction. Widely used in aviation, aerospace, missiles, rockets, atomic energy, microelectric technology, chemical industry, glass industry, gas p...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B7/00
CPCY02P10/20
Inventor 罗凤兰吴保安刘庆宾陈小军翟步英唐会毅汪建胜王云春陈德茂兰莎陈兴汉赵安中潘成刚
Owner CHONGQING MATERIALS RES INST
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