A catalyst for preparing hexafluoroisopropanol, a preparation method thereof and application thereof

By pretreating the activated carbon support and loading catalysts with Pd, Ce, Mo, Co, Zr and other additives, the problem of high fluoride ion content in the gas-phase catalytic hydrogenation of hexafluoroacetone hydrate was solved, achieving high conversion and selectivity, while improving the activity and stability of the catalyst.

CN117123214BActive Publication Date: 2026-05-05ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH CO LTD +1
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Patent Information

Application Number
CN202210552897.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-20
Publication Date
2026-05-05
Estimated Expiration
2042-05-20

AI Technical Summary

Technical Problem

In the existing gas-phase catalytic hydrogenation process using hexafluoroacetone hydrate as a raw material, the high fluoride ion content in the product leads to equipment corrosion and catalyst poisoning, and the existing catalyst has insufficient activity and stability.

Method used

An activated carbon support that has undergone inorganic alkaline washing and organic alkaline gas adsorption pretreatment is used to load Pd and additives such as Ce, Mo, Co, and Zr with a particle size of 1-10 nm. The catalyst is prepared by impregnation deposition method to control the fluoride ion content in the product and improve the catalytic activity and stability.

Benefits of technology

The conversion rate of hexafluoroacetone trihydrate was ≥99%, the selectivity of hexafluoroisopropanol was ≥99%, the fluoride ion content in the product was <10ppm, and the catalyst had high activity and good stability.

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Abstract

This invention discloses a catalyst for the gas-phase catalytic hydrogenation of hexafluoroisopropanol, its preparation method, and its application. The catalyst comprises: an activated carbon support, which is pretreated by two steps: alkali washing with an inorganic alkali solution and adsorption with an organic alkali gas; an active component and an auxiliary agent supported on the activated carbon support, wherein the active component is Pd, and the auxiliary agent is selected from at least one of Ce, Mo, Co, Zr, and B, and the particle size of both the active component and the auxiliary agent is 1-10 nm. When the catalyst of this invention is used for the catalytic hydrogenation of hexafluoroacetone trihydrate, the fluoride ion content in the product can be controlled below 10 ppm, and it also exhibits high reactivity and reaction stability.
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