Process for the production of antimony trisulfide

By controlling the heating reaction of a mixture of antimony metal powder, antimony trioxide powder, and sulfur powder, the problems of high heat demand and excessive sulfur dioxide production in existing technologies have been solved, enabling the stable manufacturing and safe production of high-purity antimony trisulfide.

CN116891252BActive Publication Date: 2025-10-17NIHON SEIKO CO LTD
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Patent Information

Application Number
CN202310321413.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2022-03-31
Filing Date
2023-03-29
Publication Date
2025-10-17
Estimated Expiration
2043-03-29

AI Technical Summary

Technical Problem

Existing methods for manufacturing antimony trisulfide require a large amount of heat, easily generate sulfur dioxide and pose an explosion risk, and have a low reaction rate.

Method used

A mixture of antimony powder, antimony trioxide powder, and sulfur powder is used for heating and reaction. The particle size and ratio are controlled, and the heating temperature is limited to between 300°C and 800°C. Inert gas is used for purging to suppress the oxidation reaction.

Benefits of technology

Stable production of high-purity antimony trisulfide reduces sulfur dioxide production and improves reaction safety and efficiency.

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Abstract

A method for stably producing antimony trisulfide with high purity is provided. The method comprises: a mixing step of mixing metallic antimony powder, antimony trioxide powder, and sulfur powder to obtain a mixture; and a heating step of heating the mixture.
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Citation Information

Patent Citations

  • Production of metallic antimony

    JP1994322455A

  • Production of antimony trioxide

    JP1994329417A

  • Method for producing antimony trisulfide

    WO2014054112A1

  • Metal sulfide single crystal material and preparation method

    CN101792931A

  • Method for preparing antimony sulfide powder through flash heat treatment

    CN112079383A