Method for preparing target-used Ru (ruthenium) powder

The technology of ruthenium powder and ruthenium trichloride is applied in the production field of ruthenium powder for target materials, and can solve the problems of unreachable ruthenium powder for target and low tap density of powder, and achieve the effect of improving purity

Active Publication Date: 2013-07-31
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tap density of the powder prepared by this method is small, wh

Method used

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  • Method for preparing target-used Ru (ruthenium) powder
  • Method for preparing target-used Ru (ruthenium) powder
  • Method for preparing target-used Ru (ruthenium) powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 Shown, get solid ruthenium trichloride 1000 grams, contain ruthenium 370 grams, operate as follows:

[0027] 1. Dissolving: Solid ruthenium trichloride is dissolved with 7.4 liters of 8mol / L hydrochloric acid, so that the concentration of ruthenium is 50 grams / liter, and a saturated solution of ammonium chloride is added to the ruthenium-containing solution to generate (NH 4 ) 3 RuCl 6 (Ⅲ), the amount of ammonium chloride added is 1.3 times of the theoretical amount.

[0028] ②Precipitation: Heating the solution at a temperature of 90°C, passing in 1 liter / min of chlorine gas for oxidation and stirring to obtain (NH 4 ) 2 RuCl 6 (Ⅳ) Precipitation, the stirring speed is 80 rpm, and the chlorine gas oxidation time is 2 hours, until the ammonium chlororuthenate (Ⅳ) precipitates completely, and the ammonium chlororuthenate (Ⅳ) precipitate is obtained by filtration, and the mother liquor is analyzed to contain 0.7 grams of ruthenium , The precipitation ra...

Embodiment 2

[0036] like figure 1 Shown, get solid ruthenium trichloride 3000 grams, contain ruthenium 1110 grams, operate as follows:

[0037] ① Dissolution: Dissolve the solid ruthenium trichloride with 24.66 liters of 10mol / L hydrochloric acid, so that the concentration of ruthenium is 45 grams / liter, and add saturated ammonium chloride solution to the ruthenium-containing solution to generate (NH 4 ) 3 RuCl 6 (Ⅲ), the amount of ammonium chloride added is 1.3 times of the theoretical amount.

[0038] ②Precipitation: Heating the solution at a temperature of 95°C, passing in 0.8 liter / min of chlorine gas for oxidation and stirring to obtain (NH 4 ) 2 RuCl 6 (Ⅳ) Precipitation, the stirring speed is 70 rpm, and the chlorine gas oxidation time is 2.5 hours, until the ammonium chlororuthenate (Ⅳ) precipitates completely, and the ammonium chlororuthenate (Ⅳ) precipitate is obtained by filtration, and the precipitated mother liquor is analyzed to contain ruthenium 5.12 grams, the precipit...

Embodiment 3

[0046] like figure 1 Shown, get solid ruthenium trichloride 6000 grams, contain ruthenium 2220 grams, operate as follows:

[0047] ① Dissolution: Dissolve the solid ruthenium trichloride with 40.36 liters of 8mol / L hydrochloric acid to make the concentration of ruthenium 55 grams / liter, add saturated ammonium chloride solution to the ruthenium-containing solution to generate (NH 4 ) 3 RuCl 6 (Ⅲ), the amount of ammonium chloride added is 1.4 times of the theoretical amount.

[0048] ②Precipitation: Heating the solution at a temperature of 98°C, passing in 0.9 liters / min of chlorine gas for oxidation and stirring to obtain (NH 4 ) 2 RuCl 6 (Ⅳ) Precipitation, the stirring speed is 90 rpm, and the chlorine gas oxidation time is 3 hours, until the ammonium chlororuthenate (Ⅳ) precipitates completely, and the ammonium chlororuthenate (Ⅳ) precipitate is obtained by filtration, and the mother liquor contains 2.12 grams of ruthenium , The precipitation rate of ruthenium was 99.9%...

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Abstract

The invention provides a method for preparing target-used Ru powder and relates to the technical field of precious metal powder production. The method for preparing the target-used Ru powder comprises the steps as follows; 1) solvation, 2) precipitation, 3) centrifugal filtration, 4) drying, 5) crushing, 6) calcination, 7) reduction and 8) powder preparation. According to the method, oxidation reaction is performed by means of chlorine gas to oxidize Ru (III) in a solution into Ru (IV), simultaneously, the concentration of Ru is controlled in a range of 45-55 g/L, the concentration of hydrochloric acid is controlled in a range of 8-12 mol/L, the oxidizing temperature is controlled in a range of 90-100 DEG C, and the mixing speed is 60-90 revolutions/min, so that 99.9% of (NH4)2RuCl6(IV) in the solution can be precipitated, the (NH4)2RuCl6(IV) is separated from impurities, and the purity of the (NH4)2RuCl6(IV) is improved.

Description

technical field [0001] The invention relates to the production of noble metal powder, more specifically to the production of ruthenium powder for target materials. Background technique [0002] With the rapid development of information and computer technology, the demand for ruthenium powder for computer hard disk memory material target is increasing. Ruthenium powder for target has special index requirements, the contents of iron, carbon, sodium and potassium are less than 10ppm, the contents of nitrogen and chlorine are less than 50ppm, and the total impurities excluding gas elements are less than 100ppm. The particle size of ruthenium powder is less than 4um, the shape is regular and spherical, and the tap density is 3.2~4.0g / cm 3 , bulk density 2~2.6g / cm 3 . [0003] At present, the domestic general use of H 2 SO 4 +NaClO 3 Two oxidative distillations, the absorption solution is concentrated and crystallized to obtain RuCl 3 Calcination of hydrogen to reduce RuCl ...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 吴喜龙贺小塘管伟明郭俊梅韩守礼王欢马子龙李红梅赵雨李子璇李锟
Owner GUIYAN RESOURCE YIMEN
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