Process for preparing hydrazine hydrate using an absorption column
JP2025519715A5Pending Publication Date: 2026-07-01ARKEMA FRANCE SA
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Patent Information
- Application Number
- JP2024573706
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-06-24
- Filing Date
- 2023-06-23
- Publication Date
- 2026-07-01
AI Technical Summary
Technical Problem
Industrial processes face challenges in efficiently performing gas-liquid-liquid contact with satisfactory yields, reasonable energy consumption, and simple installation for the production of hydrazine hydrate.
Method used
A two-step process involving the dissolution of gaseous ammonia in an aqueous phase using an absorption column, followed by mixing the ammoniacal aqueous phase with an organic phase containing a ketone in a conventional stirred reactor, allowing for efficient azine formation and subsequent hydrolysis to hydrazine hydrate.
Benefits of technology
This method enables high yields of hydrazine hydrate even at low stirring levels, reducing energy consumption and simplifying the installation, making it suitable for industrial-scale production.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to a process for preparing hydrazine hydrate, comprising the following consecutive steps: a) preparing by means of an absorption column of an aqueous solution containing dissolved ammonia and at least one activator, and introducing into said absorption column an aqueous solution containing at least one activator and fresh ammonia; then b) reacting the aqueous ammonia solution containing at least one activator obtained in the previous step with hydrogen peroxide and a ketone in at least one reactor; then c) separating the organic phase containing azine from the aqueous phase from the stream formed at the end of the previous step; then d) hydrolyzing the organic phase obtained in the previous step to obtain hydrazine hydrate.
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