| 3,4-二羟基苯甲醛的合成工艺 |
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| 引用本文： | 张灏,宋国强.3,4-二羟基苯甲醛的合成工艺[J].精细石油化工,2002(2):31-33. |
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| 作者姓名： | 张灏 宋国强 |
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| 作者单位： | 江苏石油化,工学院化学工程系,常州,213016 |
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| 摘 要： | 研究了以对羟基苯甲醛、溴为主要原料 ,经溴代、水解制备 3 ,4二羟基苯甲醛的方法。确定了水解反应条件 :氢氧化钾与 3溴 4羟基苯甲醛摩尔比 3∶ 1 ,反应温度 1 5 0℃ ,反应压力 0 .4MPa,反应时间 0 .5 h,催化剂用量 (以 3溴 4羟基苯甲醛质量计 ) 4% ,3 ,4二羟基苯甲醛的收率达 5 3 %以上
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| 关 键 词： | 对羟基苯甲醛 3 4二羟基苯甲醛 溴代 水解 3溴4羟基苯甲醛 |
| 修稿时间： | 2001年6月11日 |
SYNTHESIS OF 3,4-DIHYDROXYBENZALDEHYDE |
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| Zhang Hao and Song Guoqiang.SYNTHESIS OF 3,4-DIHYDROXYBENZALDEHYDE[J].Speciality Petrochemicals,2002(2):31-33. |
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| Authors: | Zhang Hao and Song Guoqiang |
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| Abstract: | A process for the preparation of 3,4 dihydroxybenzaldehyde from p hydroxybenaldehyde, bromine and potassium hydroxide was studied, which comprises the steps of bromation and hydrolysis. The effects of amount of reactants, temperature, pressure, catalyst and the concentration of KOH were investigated. The hydrolysis conditions were determined as follows: molar ratio of KOH to 3 bromo 4 hydroxybenzaldehyde 3∶1, reaction temperature 150 ℃, reaction pressure 0.4 MPa, reaction time 0.5 h, amount of catalyst 4% (based on the mass of 3 bromo 4 hydroxybenzaldehyde). 3,4 Dihydroxybenzaldehyde was given in over 53% yield. |
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| Keywords: | p hydroxybenaldehyde 3 4 dihydroxybenzaldehyde bromation hydrolysis 3 bromo 4 hydroxybenzaldehyde |
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