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Method for preparing high-purity rhodium powder through rhodium trichloride

A technology of rhodium trichloride and pure rhodium powder, which is applied in the field of preparing high-purity rhodium powder, and can solve the problems of long process flow and low purity of rhodium powder

Pending Publication Date: 2021-06-25
CNOOC TAIYUAN PRECIOUS METALS
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Problems solved by technology

[0006] The purpose of this invention is to provide a method for preparing high-purity rhodium powder with rhodium trichloride, so as to solve the problem that the existing rhodium refining process is long and the purity of the rhodium powder obtained by refining is low

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  • Method for preparing high-purity rhodium powder through rhodium trichloride

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Embodiment Construction

[0036] The core of the invention is to provide a method for preparing high-purity rhodium powder with rhodium trichloride, which improves the preparation efficiency of the high-purity rhodium powder and the purity of the extracted rhodium powder.

[0037] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] Please refer to figure 1 , figure 1 For the flow chart of the first specific embodiment of the method for preparing high-purity rhodium powder with rhodium...

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Abstract

The invention discloses a method for preparing high-purity rhodium powder through rhodium trichloride. The method comprises the following steps of dissolving solid rhodium trichloride powder by using a first acid solution to obtain a chlororhodium acid solution; removing cation impurities in the chlororhodium acid solution through ion exchange resin, and obtaining a pure rhodium solution; adding a first alkaline solution into the pure rhodium solution to generate rhodium hydroxide precipitate, adding deionized water for washing, and adjusting the pH value to a target value to obtain rhodium hydroxide; separating the rhodium hydroxide by adopting a pressurized hydrogen reduction method to obtain rhodium reduction powder; putting the rhodium reduction powder into a hydrogen introducing furnace, performing heat preservation reduction sintering, and obtaining sintered rhodium powder; and washing the rhodium powder by using a second acid solution, a second alkaline solution and deionized water, and carrying out vacuum drying to obtain the pure rhodium powder. According to the method provided by the invention, the preparation efficiency of the rhodium powder and the purity of the refined rhodium powder are improved.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for preparing high-purity rhodium powder with rhodium trichloride. Background technique [0002] Rhodium is a silver-white transition metal and one of the platinum group precious metals. It is hard and brittle, has strong reflection ability, and is particularly soft when heated. Rhodium has good chemical stability and strong oxidation resistance, and can maintain metallic luster for a long time in the air. Rhodium-containing precious metal alloys have superior physical and chemical properties, and are widely used in industry, electronic information, aerospace, military and other fields. For example, Rh, Pt catalytic nets for the production of nitric acid; Rh, Pt, Pd purification catalysts for automobile exhaust, etc. The expansion of the industrial application field of precious metals has made them listed as strategic materials by many countries. [0003] Due to th...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F1/00
CPCB22F9/22B22F1/145
Inventor 李志刘欣权凯栋韩志敏
Owner CNOOC TAIYUAN PRECIOUS METALS
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