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Method for efficiently separating and purifying rhodium and ruthenium

A rhodium-ruthenium, high-efficiency technology, applied in the field of high-efficiency separation and purification of rhodium-ruthenium, can solve the problems of incomplete recycling and separation of alloy waste, and achieve the effect of low cost and easy operation

Inactive Publication Date: 2013-04-03
CHENZHOU GAOXIN PLATINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention technology is aimed at the comprehensive separation and recovery of rhodium-ruthenium alloy waste, and the purity of rhodium and ruthenium obtained by purification is above 99.95%, and the recovery rate reaches 99%. incomplete separation problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Accurately weigh 200g of the enriched rhodium-ruthenium alloy waste (which contains about 29% ruthenium), and grind it to 200-300nm with a high-frequency grinder; add the ground rhodium-ruthenium waste to 1000g of sodium chloride and mix evenly, Lay it flat in a quartz boat, and in a closed state, pass in 30mL / min of chlorine gas, raise the temperature to 600°C for 6 hours, and use 4mol / L hydrochloric acid solution to absorb part of the ruthenium tetroxide gas brought out by the gas, and use 15% for the tail gas Sodium hydroxide solution absorption; chlororhodium salt and chlororuthenate obtained by chlorination are dissolved with 2mol / L hydrochloric acid solution, the dissolved residue is repeatedly chlorinated 3 times, the filtrates are combined, and 10% sodium hydroxide or potassium hydroxide is added to the filtrate Precipitate, put rhodium hydroxide and ruthenium hydroxide in a round bottom flask with vacuum, add 2mol / L hydrochloric acid solution to dissolve, heat a...

Embodiment 2

[0023] Accurately weigh 200g of the enriched rhodium-ruthenium alloy waste (which contains about 55% ruthenium), and grind it to 200-300nm with a high-frequency grinder; add the ground rhodium-ruthenium waste to 800g of sodium chloride and mix evenly, Lay it flat in a quartz boat, and in a closed state, pass in 40mL / min of chlorine gas, raise the temperature to 600°C for 6 hours, and use 6mol / L hydrochloric acid solution to absorb part of the ruthenium tetroxide gas brought out by the gas, and use 15% for the tail gas Sodium hydroxide solution absorption; chlororhodium salt and chlororuthenate obtained by chlorination are dissolved with 2mol / L hydrochloric acid solution, the dissolved residue is repeatedly chlorinated 3 times, the filtrates are combined, and 15% sodium hydroxide or potassium hydroxide is added to the filtrate Precipitate, put rhodium hydroxide and ruthenium hydroxide in a round bottom flask with vacuum, add 2mol / L hydrochloric acid solution to dissolve, heat at...

Embodiment 3

[0025] Accurately weigh 200g of the enriched rhodium-ruthenium alloy waste (which contains about 75% ruthenium), and grind it to 200-300nm with a high-frequency grinder; add the ground rhodium-ruthenium waste to 600g of sodium chloride and mix evenly, Lay it flat in a quartz boat, and in a closed state, pass in 50mL / min of chlorine gas, raise the temperature to 600°C for 6 hours, and use 6mol / L hydrochloric acid solution to absorb part of the ruthenium tetroxide gas brought out by the gas, and use 15% of the tail gas Sodium hydroxide solution absorption; chlororhodium salt and chlororuthenate obtained by chlorination are dissolved with 2mol / L hydrochloric acid solution, the dissolved residue is repeatedly chlorinated 3 times, the filtrates are combined, and 15% sodium hydroxide or potassium hydroxide is added to the filtrate Precipitate, put rhodium hydroxide and ruthenium hydroxide in a round bottom flask with vacuum, add 2mol / L hydrochloric acid solution to dissolve, heat at ...

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PUM

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Abstract

The invention provides a method for efficiently separating and purifying rhodium and ruthenium. The method comprises rhodium-ruthenium alloy waste pretreatment, medium-temperature chlorination, rhodium-ruthenium separation and rhodium-ruthenium refining. The method is used for comprehensive separation and recovery of rhodium-ruthenium alloy waste, the purities of both the rhodium and the ruthenium obtained by purification are more than 99.95 percent, and the yields reach 99 percent. The method is easy and convenient to operate and low in cost, and successfully solves the problem of incomplete separation and recovery of the rhodium-ruthenium alloy waste.

Description

technical field [0001] The invention relates to the recovery of precious metals, in particular to a method for efficiently separating and purifying rhodium and ruthenium. Background technique [0002] Rhodium is a silver-white transition metal and one of the precious metals. It is hard and brittle, has strong reflection ability, and is particularly soft when heated. Rhodium has good chemical stability, strong oxidation resistance, and can maintain luster for a long time in the air. Precious metal alloys containing rhodium have superior physical and chemical properties and are widely used in industry, electronic information, aerospace, military and other fields, for example, Rh and Ru alloy catalysts containing 20% ​​Ru, Rh and Pt used in potentiometer winding materials , Ru alloy materials, supported Rh-Ru alloy catalysts, Rh, Pt catalytic nets for the production of nitric acid, Rh, Pt, Pd catalysts for automobile exhaust purification, etc. Precious metals play an increasi...

Claims

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Application Information

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IPC IPC(8): C22B1/08C22B3/10C22B3/44C22B11/00
CPCY02P10/20
Inventor 杨拥军雷涤尘冯志杰叶咏祥邓春玲杨静
Owner CHENZHOU GAOXIN PLATINUM
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