| 2，4–二氟苯甲醛的合成 |
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| 引用本文： | 王丽华,赵国志,周凤军. 2，4–二氟苯甲醛的合成[J]. 化工学报, 2005, 56(3): 474-476 |
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| 作者姓名： | 王丽华 赵国志 周凤军 |
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| 作者单位： | 辽宁工程技术大学资源与环境工程学院，辽宁 阜新 123000;阜新市热电厂,辽宁 阜新 123000 |
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| 摘 要： | 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 1.5MPa. 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 ω(2,4-difluorobenzaldehyde)≥98.81%.
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| 关 键 词： | 1,3–二氟苯 一氧化碳 2,4–二氟苯甲醛 合成, |
| 文章编号： | 0438-1157(2005)03-0474-03 |
| 收稿时间： | 2004-05-17 |
| 修稿时间： | 2004-6-25 |
Synthesis experiment of 2,4-difluorobenzaldehyde |
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| WANG Lihua,ZHAO Guozhi,ZHOU Fengjun. Synthesis experiment of 2,4-difluorobenzaldehyde[J]. Journal of Chemical Industry and Engineering(China), 2005, 56(3): 474-476 |
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| Authors: | WANG Lihua ZHAO Guozhi ZHOU Fengjun |
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| 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%. |
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| Keywords: | difluorobenzene carbonmonoxide 2 4-difluorobenzaldehyde synthesis |
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