Ruthenium nitrate and a method for producing the same

By using alkaline solutions and surfactants in the hydrolysis reaction and calcination process during the preparation of ruthenium nitrate, the problems of high impurity content and uneven particle size in existing ruthenium nitrate products have been solved. This has achieved high purity and uniform particle size dispersibility of ruthenium nitrate, improving the purity and dispersibility of the product and meeting the needs of industrial production.

CN117945471BActive Publication Date: 2026-07-03XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
Filing Date
2024-03-07
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

The ruthenium nitrate products produced by existing technologies generally have problems such as the presence of Na+ and Cl- ions, inconsistent particle size, and poor dispersibility, which affect the performance of ruthenium-based catalysts. In addition, traditional methods introduce silver ion and chloride ion impurities, making it difficult to meet the requirements of industrial production.

Method used

Ruthenium nitrate is prepared by hydrolysis reaction using alkaline solution and surfactant, combined with calcination process, and nitrosylation reaction of hydrolysis precipitate with nitric acid and nitric oxide. This avoids the use of silver- or sodium-containing raw materials, and the purity is improved by rotary evaporation and vacuum drying.

Benefits of technology

The prepared ruthenium nitrate has high purity, extremely low sodium and chloride ion content, uniform particle size, good dispersion, and product quality far exceeds industry standards. The process is simple, the cost is low, and it is suitable for large-scale production.

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Abstract

This invention belongs to the field of ruthenium-based catalyst preparation, specifically disclosing a ruthenium nitrate and its preparation method. By adding a surfactant during the hydrolysis process and coordinating it with a subsequent calcination process, this invention can improve the dispersibility of the obtained ruthenium nitrate powder, reduce the particle size of the obtained ruthenium nitrate powder, significantly reduce the content of impurities such as sodium and chlorine, and improve the purity of the ruthenium nitrate product.
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Citation Information

Patent Citations

  • Process method for synthesizing liquid ruthenium nitrate

    CN113582259A

  • Preparation method of ruthenium dioxide for resistance paste

    CN107758751A

  • Production of rhodium nitrate solution

    JP1988176311A