关键词: 1, 3–二氟苯;一氧化碳;2, 4–二氟苯甲醛;合成

Abstract: 2,4-Difluorobenzaldehyde was synthesized from 1,3-difluorobenzene and carbon monoxide with AlCl3 and HCl as catalyst in CO atmosphere at a pressure in the range of 1.5 MPa. Effects on the converting ratio and yield were investigated. The results showed that the optimum technological conditions should be that n（1,3-difluorobenzene）∶n（AlCl₃）=1.0∶1.0, the reaction temperature was 60℃, amount of HCl was 1.0% of total mass of reation mixture, and the reation time was 20 hours. The selectivity of 2,4-difluorobenzaldehyde from 1,3-difluorobenzene was up to the purity of the refined product w(2,4-difluorobenzaldehyde) ≥98.81%.

Key words: 1, 3–二氟苯;一氧化碳;2, 4–二氟苯甲醛;合成