| 邻对羟基苯甲醛分离和精制方法的改进 |
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| 引用本文： | 邬国英 崔益江. 邻对羟基苯甲醛分离和精制方法的改进[J]. 精细化工, 1993, 10(1): 41-45 |
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| 作者姓名： | 邬国英 崔益江 |
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| 作者单位： | 江苏化工学院有机化工系，江苏化工学院有机化工系 常州 213016，常州 213016 |
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| 摘 要： | Reimer-Tieman法制得的羟基苯甲醛反应液中和之后,pH值控制在3～4之间,可增加目的产物收率,有利于焦油状胶质的分离。采用减压蒸馏法并引入高沸点组份,可使邻对位羟基苯甲醛的分离收率达到80％以上,产品纯度达到98％以上。
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| 关 键 词： | 羟基苯甲醛 分离 精制 |
IMPROVEMENT OF THE METHOD FOR THE SEPARATION AND PURIFICATION OF O-AND P-HYDROXYBENZALDEHYDE |
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| Abstract: | The separation and purificition of o-and p-hydroxybenzaldehyde formed by Reimer-Tieman reaction can be carried out with high efficience when liquid product solution is neutralized to pH = 3-4,and tar oil can easily beremoved from the solution. High-purity (> 98%) p-hydroxybenzaldehyde can be obtained by vacuum distillation after adding a component with high boil point to the distilled material composed of p-hydroxybenzaldehyde and other by-products. The improved procedure is efficient,and little waste is discharged. |
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