Copper-based solid-phase catalyst and its preparation method and application

Abstract

The invention belongs to the field of catalyst preparation, and specifically relates to a copper-based solid phase catalyst and its preparation method and application. The preparation method includes a silica carrier, a copper oxide active component supported on the silica carrier, and a catalyst modifier alumina; the catalyst includes the following steps: 1) prepare the template 1 mole part of agent, 0.1-0.3 mole part of the precursor of silica carrier and 0.4-0.8 mole part of ammonia water were added to 25-50 mole parts of deionized water; 2) Add aluminum source and copper source; 3) Add step 2) The obtained mixture is sequentially crystallized, washed, dried and roasted; the catalyst of the present invention greatly simplifies the synthesis steps of the catalyst, and the catalyst in the patent of the present invention only needs one roasting to complete the preparation.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a copper-based solid-phase catalyst, a preparation method and application thereof. Background technique [0002] Fluorine-containing olefin epoxides are an important class of intermediates in organic fluorine chemistry. Due to their active epoxy groups, a series of chemical reactions can occur, so a series of important fluorine-containing olefin epoxides can be synthesized Fluorine organic intermediates. Among them, hexafluoropropylene oxide is the most widely used fluorine-containing olefin epoxide. It is the basic raw material for the synthesis of perfluoropropionyl fluoride, hexafluoroacetone, perfluoroalkyl vinyl ether and perfluoropolyether. In addition, epoxides of other fluorine-containing olefins can be widely used in polymer modification. Therefore, how to economically and efficiently synthesize fluorine-containing olefin epoxides is an important topic ...

AI Technical Summary

Problems solved by technology

The process of preparing these catalysts is relatively complicated. In addition to loading active components, some modifiers also need to be loaded. Therefore, multi-step impregnation and roasting are required, which consumes a lot of experimental time.

In addition, the catalyst prepared by the traditional multi-step loading method is difficult to achieve uniform distribution of active components and modifiers on the surface of the carrier, and the specific surface area of ​​the carrier used in the traditional method is small

Due to the above two reasons, the conversion rate and selectivity obtained by the oxygen gas-phase catalytic oxidation method are very low, which restricts the application of the oxygen gas-phase catalytic oxidation method to synthesize hexafluoropropylene oxide in actual production.

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