Continuous process for the production of heptafluoroisobutyryl fluoride

By using carbonyl fluoride and hexafluoropropylene as raw materials in a tubular reactor, combined with a self-designed fluorinated molecular sieve catalyst and a three-stage temperature-controlled reaction, the problems of low efficiency and high cost in the preparation of heptafluoroisobutyryl fluoride in the existing technology have been solved, and efficient and simple industrial production has been achieved.

CN121005618BActive Publication Date: 2026-02-27SHANDONG QIFU NEW MATERIALS CO LTD +1
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Patent Information

Application Number
CN202511543493.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2026-02-27
Estimated Expiration
2045-10-28

AI Technical Summary

Technical Problem

In the existing technology, the preparation methods of heptafluoroisobutyryl fluoride have problems such as many side reactions, low yield of main product, high energy consumption, difficulty in catalyst recovery, complex operation and unsuitability for industrial production.

Method used

Heptafluoroisobutyryl fluoride was synthesized in a tubular reactor via a one-step continuous flow reaction using carbonyl fluoride and hexafluoropropylene as gas-phase reaction feedstocks. A self-designed fluorinated molecular sieve catalyst was used, and the reaction parameters were optimized to achieve a three-stage temperature-controlled reaction.

Benefits of technology

It improves reaction conversion rate and selectivity, simplifies the production process, reduces costs, is suitable for large-scale industrial production, and the products are easy to separate, meeting environmental protection requirements.

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Abstract

The application belongs to the technical field of fluorine chemical industry, and particularly relates to a continuous production process of heptafluoroisobutyryl fluoride. The process is carried out in a tubular reactor, which is divided into a first preheating section, a second reaction section and a third reaction section. Fluorinated molecular sieve catalyst is loaded in the second reaction section and the third reaction section, each reaction section is heated to a corresponding preset temperature, mixed and preheated carbonyl fluoride and hexafluoropropene are introduced into the tubular reactor, and flow through each section of the tubular reactor in sequence, and react with the fluorinated molecular sieve catalyst in the second reaction section and the third reaction section. The gas discharged from the outlet end of the tubular reactor is condensed to obtain heptafluoroisobutyryl fluoride product. The process uses carbonyl fluoride and hexafluoropropene as the gas phase reaction raw material, and synthesizes heptafluoroisobutyryl fluoride by one-step continuous flow rapid reaction; the reaction route is short, the reaction conversion rate and selectivity are high, and industrial large-scale production is easy to realize.
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