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A kind of preparation method of high-purity ultrafine ruthenium oxide

A technology of ruthenium oxide and ruthenium tetroxide, which is applied in the field of preparation of high-purity ultrafine ruthenium oxide, can solve the problems that the particle size and particle size distribution of ruthenium oxide cannot be controlled, and it is difficult to use it well, so as to ensure purity and purity stability, easy to obtain, Good performance and stability

Active Publication Date: 2017-09-19
KUNMING RONGGUI ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can well control the purity and purity stability of ruthenium oxide, and is also convenient for mass production, but it cannot control the particle size and particle size distribution of ruthenium oxide, and the resulting product is also difficult to use well in the field of electronics industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of ruthenium tetroxide by distillation: put pure ruthenium powder in a distillation bottle, add sulfuric acid solution at a solid-to-liquid ratio of g / mL as 1:10, then add sodium chlorate dropwise after heating until the mixed solution boils to saturate Solution stops adding when ruthenium tetroxide vapor is produced, after ruthenium tetroxide vapor is absorbed by condensation to obtain ruthenium tetroxide crystal, add dropwise sodium chlorate saturated solution again to stop adding when ruthenium tetroxide vapor is produced, so repeatedly for many times, until The mixed solution no longer produces ruthenium tetroxide vapor;

[0031] Wherein, the sulfuric acid solution is the sulfuric acid solution obtained by diluting commercially available concentrated sulfuric acid and water in a volume ratio of 1:2;

[0032] (2) Prepare an aqueous solution of ruthenium tetroxide: dissolve the crystals of ruthenium tetroxide obtained in (1) in pure water to prepare an...

Embodiment 2

[0038] (1) Preparation of ruthenium tetroxide by distillation: put pure ruthenium powder in a distillation bottle, add sulfuric acid solution at a solid-to-liquid ratio of g / mL as 1:10, then add sodium chlorate dropwise after heating until the mixed solution boils to saturate Solution stops adding when ruthenium tetroxide vapor is produced, after ruthenium tetroxide vapor is absorbed by condensation to obtain ruthenium tetroxide crystal, add dropwise sodium chlorate saturated solution again to stop adding when ruthenium tetroxide vapor is produced, so repeatedly for many times, until The mixed solution no longer produces ruthenium tetroxide vapor;

[0039] Wherein, the sulfuric acid solution is the sulfuric acid solution obtained by diluting commercially available concentrated sulfuric acid and water in a volume ratio of 1:2;

[0040] (2) Prepare an aqueous ruthenium tetroxide solution: dissolve the ruthenium tetroxide crystals obtained in (1) in pure water to prepare an aqueo...

Embodiment 3

[0046](1) Preparation of ruthenium tetroxide by distillation: put pure ruthenium powder in a distillation bottle, add sulfuric acid solution at a solid-to-liquid ratio of g / mL as 1:10, then add sodium chlorate dropwise after heating until the mixed solution boils to saturate Solution stops adding when ruthenium tetroxide vapor is produced, after ruthenium tetroxide vapor is absorbed by condensation to obtain ruthenium tetroxide crystal, add dropwise sodium chlorate saturated solution again to stop adding when ruthenium tetroxide vapor is produced, so repeatedly for many times, until The mixed solution no longer produces ruthenium tetroxide vapor;

[0047] Wherein, the sulfuric acid solution is the sulfuric acid solution obtained by diluting commercially available concentrated sulfuric acid and water in a volume ratio of 1:2;

[0048] (2) Prepare an aqueous ruthenium tetroxide solution: dissolve the ruthenium tetroxide crystals obtained in (1) in pure water to prepare an aqueou...

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Abstract

The invention discloses a preparation method of high purity ultrafine ruthenium oxide. The preparation method comprises the following steps: preparing ruthenium tetroxide by a distillation method, then preparing a water solution of ruthenium tetroxide and an ethyl acetate saturated water solution, adding the obtained ruthenium tetroxide water solution into a container, adding the ethyl acetate saturated water solution into the container under stirring, allowing the container to stand still for a while, discarding the supernate to obtain ruthenium oxide precipitate; placing the ruthenium oxide precipitate in a liquid draining funnel to remove water, washing the precipitate, and completely drying the precipitate to obtain high purity ultrafine ruthenium oxide. The obtained ruthenium oxide product has a good dispersing property and is convenient to wash. The shortage of long washing period of a conventional hydrolysis method is overcome. The production period is shortened, and the production efficiency is prominently improved.

Description

technical field [0001] The invention relates to a preparation method of high-purity ultrafine ruthenium oxide, which belongs to the technical field of metal compound preparation. Background technique [0002] Ruthenium oxide is widely used in industry and is the basic raw material in the fields of catalysts, capacitors, resistors, etc. Its preparation process and product performance are critical to the production and processing of subsequent products, especially in the manufacture of components in the electronic industry. There are almost strict requirements on the product performance of ruthenium oxide. At present, domestic ruthenium oxide for resistors basically relies on foreign products. With the rapid development of my country's electronics industry, it is urgent to make a breakthrough in the preparation process of ruthenium oxide products. [0003] The most critical thing in the performance of ruthenium oxide products is the purity of the product, which requires not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G55/00
CPCC01G55/004C01P2004/61C01P2006/80
Inventor 郑恩华张维峰魏晓晖李雄覃龙张凯
Owner KUNMING RONGGUI ELECTRONICS MATERIALS
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