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Method for gathering platinum and palladium in solution

A solution, platinum-palladium technology, applied in the field of separation and recovery of platinum-palladium-containing solution, can solve the problems of poor separation effect, low efficiency, high cost, etc., and achieve the effects of reduced use cost, shortened reaction time, and good adaptability

Inactive Publication Date: 2016-07-20
JIANGXI COPPER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active metal displacement method has been applied in industry, but there are many defects such as low efficiency, high cost, large amount of slag and poor separation effect.

Method used

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  • Method for gathering platinum and palladium in solution
  • Method for gathering platinum and palladium in solution
  • Method for gathering platinum and palladium in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Accurately measure 3.00L of platinum-palladium-containing solution into a 5L reactor, stir and adjust the solution to acidity, heat up to 75°C, and then add sodium sulfite solution with a concentration of 100g / L to the reaction solution at a rate of 50mL / min In, and monitor the potential of the reaction solution with a potentiometer, stop when the potential of the solution reaches 535mV. After the solution is cooled, the solid and liquid are separated to obtain platinum-palladium-reduced liquid and platinum-palladium concentrate. The volume, main element concentration and precipitation rate of the solution before and after the reaction are shown in Table 1, and the composition of the platinum palladium concentrate is shown in Table 2.

[0019] Table 1 Elemental analysis results before and after platinum palladium solution reduction

[0020]

[0021] Table 2 The element composition analysis results of platinum palladium concentrate

[0022] the element

[...

Embodiment 2

[0025] Accurately measure 3.00L of platinum-palladium-containing solution and pour it into a 5L reactor, stir and adjust the solution to acidity, heat up to 65°C, and then feed SO at a flow rate of 50mL / min 2 Gas, and monitor the potential of the reaction solution with a potentiometer, and stop when the potential of the solution reaches 505mV. After the solution is cooled, the solid and liquid are separated to obtain platinum-palladium-reduced liquid and platinum-palladium concentrate. The volume, main element concentration and precipitation rate of the solution before and after the reaction are shown in Table 3, and the composition of the platinum palladium concentrate is shown in Table 4.

[0026] Table 3 Elemental analysis results before and after platinum palladium solution reduction

[0027]

[0028]

[0029] The element composition analysis result of table 4 platinum palladium concentrate

[0030] the element

[0031] .

Embodiment 3

[0033] Accurately measure 3.00L of platinum-palladium-containing solution and pour it into a 5L reactor, stir and adjust the solution to acidity, heat up to 85°C, then add solid oxalic acid at a rate of 8g / min, and monitor the potential of the reaction solution with a potentiometer. Stop when the solution potential reaches 480mV. After the solution is cooled, the solid and liquid are separated to obtain platinum-palladium-reduced liquid and platinum-palladium concentrate. The volume, main element concentration and precipitation rate of the solution before and after the reaction are shown in Table 5, and the composition of the platinum palladium concentrate is shown in Table 6.

[0034] Table 5 Elemental analysis results before and after platinum palladium solution reduction

[0035]

[0036] The element composition analysis result of table 6 platinum palladium concentrate

[0037] the element

[0038] .

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Abstract

The invention provides a method for gathering platinum and palladium in a solution, and relates to separation and recycling of rare and precious metals in wet metallurgy. The method comprises the following steps of taking a solution containing platinum and palladium as a stock solution; carrying out selective reduction by controlling electric potential; and converting the platinum and the palladium in the solution into simple substances and precipitating to obtain concentrate which is rich in platinum and palladium. The method is characterized in that a substance which does not contain heavy metal elements is used as a reducing agent, electric potential of reaction liquid is controlled, the platinum and the palladium in the solution are selectively reduced and precipitated to be below 1 mg / L, and therefore, the platinum and palladium gathering effect is achieved. Compared with a traditional reactive metal substitution method, the method is low in cost and easy to operate, and has good adaptability on stock solutions with different components, and the obtained concentrate containing the platinum and the palladium has little slag, and is high in platinum and palladium gathering degree.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy of rare and precious metals, and specifically relates to the separation and recovery technology of a solution containing platinum and palladium, so as to realize the efficient enrichment of platinum and palladium from the solution. Background technique [0002] Platinum and palladium, as two platinum group metals, are widely used in petrochemical, aviation, electronics, automobiles, atomic energy, medicine, etc. due to their high melting point, high strength, good stability, strong corrosion resistance, and excellent catalytic activity. fields. Platinum and palladium in nature often exist in ores in the form of intermetallic compounds, semi-metallic compounds, sulfides and arsenides, but their content in ores is generally extremely small, often in the form of sulfides, arsenides or Sulfur arsenide as its carrier mineral. Due to its strong high-temperature oxidation resistance, platinum and palladi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B11/00
CPCC22B3/44C22B11/00Y02P10/20
Inventor 胡意文欧阳辉王日何强黄绍勇汪秋雨
Owner JIANGXI COPPER CORP
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