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Controlled reduction preparation method of iridium trichloride

A technology of iridium trichloride and reducing agent is applied in chemical instruments and methods, inorganic chemistry, ruthenium/rhodium/palladium/osmium/iridium/platinum halide, etc. control, high product purity and stable effect

Active Publication Date: 2017-06-16
GRIKIN ADVANCED MATERIALS
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Problems solved by technology

[0004] The traditional method for preparing iridium trichloride is to powder iridium or Ir(OH) 4 Put it in a quartz tube, pass through chlorine gas that does not contain oxygen but mixed with a small amount of carbon monoxide, heat to 600 ° C or use direct sunlight or bright light from a hot magnesium strip for about 15 minutes to obtain pure IrCl 3 , but this method yields IrCl 3 Insoluble in water, acid and alkali, inconvenient to be widely used in industry

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  • Controlled reduction preparation method of iridium trichloride
  • Controlled reduction preparation method of iridium trichloride

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Embodiment Construction

[0017] The invention provides a method for preparing iridium trichloride by controlled reduction. The invention will be further described below in conjunction with the accompanying drawings and examples.

[0018] The operation steps that chloroiridic acid is reduced to iridium trichloride are as follows:

[0019] Step 1, reduction: add 100 grams of chloroiridic acid, 2 g of propanol as a reducing agent, 1.5 g of hydrazine hydrochloride, and 6.5 g of ascorbic acid into a three-necked flask placed in a constant temperature water bath equipment, and control the temperature in the constant temperature water bath equipment at 75 to 100 ℃, turn on the magnetic stirring system, carry out constant temperature stirring, constant temperature reduction for 3 hours until all tetravalent iridium in the solution is converted to trivalent;

[0020] The 2nd step, concentration: the obtained trivalent iridium aqueous solution is concentrated, and excessive water is distilled off, obtains triva...

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Abstract

Belonging to the technical field of reduction, the invention discloses a controlled reduction preparation method of iridium trichloride. The method includes: adding a quadrivalent iridium chloride and a reducing agent in a three-mouth flask according to certain proportion, under a magnetic stirring condition, and conducting constant temperature reduction until quadrivalent iridium in the solution is completely converted to trivalence. A condensation reflux device is used in the reaction process to reduce the volatilization of the reducing agent and control the reaction system stable. The method has the advantages of simple operation, short process, fully controllable reduction process and stable content, can guarantee that quadrivalent iridium can be completely reduced to trivalence, and the prepared iridium trichloride product has high purity.

Description

technical field [0001] The invention belongs to the technical field of reduction, and in particular relates to a preparation method for controlled reduction of iridium trichloride. Background technique [0002] Iridium chloride is a common compound of iridium, and is often used as the initial raw material for the synthesis of other iridium compounds and the preparation of iridium-containing catalysts. Iridium-containing compounds and catalysts are widely used in petrochemical and organic synthesis, hydrogenation catalysts, polymerization catalysts and other fields. For example, iridium trichloride hydrate, as the basic raw material for the synthesis of iridium complexes, plays an important role in the development of phosphorescent materials. [0003] Iridium has a very high melting point (2440°C), can still maintain a low oxygen permeability at 2100°C, does not react with carbon at 2280°C, and can effectively prevent the diffusion of carbon. It is the most promising antioxi...

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Application Information

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IPC IPC(8): C01G55/00
CPCC01G55/005C01P2002/85C01P2006/80
Inventor 罗瑶吴松贺昕滕海涛李治宇吴聪陈斐关俊卿熊晓东
Owner GRIKIN ADVANCED MATERIALS
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