A kind of aluminum fluoride catalyst of high specific surface area and its application

Abstract

The invention discloses an aluminum fluoride catalyst with a high specific surface area. Ethyl ether of HF and / or an alcoholic solution are / is firstly added into an organic aluminum solution for reacting to obtain a catalyst precursor, and then the aluminum fluoride catalyst is obtained through fluoridation. The specific surface area of the aluminum fluoride catalyst can reach 200 m<2> / g to 320 m<2> / g, and the aluminum fluoride catalyst is suitable for synthesis of 1-chloro-2,2,2-halothane or 3,3,3-trifluoropropene or 1,1,1,2,3-pentachloropropane or 2,3,3,3-tetrafluoropropene.

Description

technical field [0001] The invention relates to a metal fluoride catalyst for catalytic reaction, in particular to an aluminum fluoride catalyst with a high specific surface area. Background technique [0002] AlF 3 As catalysts and catalyst supports in the synthesis of organic compounds and organic fluorine compounds, more and more attention has been paid. AlF prepared by conventional method 3 The F atoms in F atoms coordinate with the Al atoms in a regular octahedral structure, making the Al atoms reach coordination saturation. The regularity of this atomic coordination not only makes most types of AlF 3 It exhibits low Lewis acidity, and its specific surface area is mostly between 0.5 and 30m 2 / g. In practical applications, the acidity of heterogeneous catalysts basically depends on the specific surface area. Therefore, AlF prepared by conventional methods 3 There are certain restrictions in the field of application. [0003] To improve AlF 3 The specific surfac...

AI Technical Summary

Problems solved by technology

Although this method can obtain aluminum fluoride with a high specific surface area, the preparation process is complicated, the raw material aluminum isopropoxide is expensive, and aluminum fluoride is amorphous and contains organic impurities.

Images