摘要
Difluorobenzaldehyde was synthesized from 1,3-difluorobenzene and carbon monoxide with AlCl 3 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(AlCl 3)=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%.
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°C, amount of HCl was 1.0% of total mass of reaction mixture, and the reaction time was 20 hours. The selectivity of 2, 4-difluorobenzaldehyde from 1,3-difluorobenzene was up to the purity of the refined product ω(2,4-difluorobenzaldehyde) ≥98.81%.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第3期474-476,共3页
CIESC Journal
关键词
1
3-二氟苯
一氧化碳
2
4-二氟苯甲醛
合成
Aluminum compounds
Carbon monoxide
Catalysts
Chromatographic analysis
Hydrochloric acid
Mass spectrometers
