A process for the production of liquid sodium cyanide and solid sodium cyanide

CN122233401APending Publication Date: 2026-06-19SHANGHAI DONGGENG CHEM TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI DONGGENG CHEM TECH CO LTD
Filing Date
2026-03-13
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing methods for producing liquid sodium cyanide suffer from high energy consumption, low product purity, low conversion rate, and strong equipment corrosion. In particular, in the hydrogen cyanide process, HCN formation is severe under low pH conditions, while metal impurities precipitate and equipment corrosion increases under high pH conditions.

Method used

By controlling the neutralization reaction temperature to 35-50℃ and the pH to 10.5-11.5, optimizing the mixing of sodium hydroxide solution and hydrogen cyanide gas, and employing specific equipment structures and recycling unreacted gases, high conversion rates and product stability are ensured.

Benefits of technology

It improves the conversion rate and product quality of liquid sodium cyanide, reduces impurity content, reduces equipment corrosion, and improves resource utilization and production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application provides a production process for liquid sodium cyanide and solid sodium cyanide. The liquid sodium cyanide production process includes the following steps: mixing a sodium hydroxide solution with a raw material gas containing hydrogen cyanide gas; the sodium hydroxide solution and the hydrogen cyanide gas in the raw material gas undergo a neutralization reaction to obtain liquid sodium cyanide. The neutralization reaction temperature is 35-50℃ and the pH is 10.5-11.5. By controlling the neutralization reaction temperature to 35-50℃ and the pH to 10.5-11.5, this application can promote the neutralization reaction while maintaining high gas solubility and inhibiting the occurrence of hydrolysis side reactions, ensuring product stability and preventing decomposition, thereby improving product quality while ensuring high conversion rate.
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