| 闪蒸-减压精馏分离苯甲酸废料 |
| |
| 引用本文： | 韩檬,杨焘,魏峰,张卫江.闪蒸-减压精馏分离苯甲酸废料[J].化学工程,2007,35(7):1-3. |
| |
| 作者姓名： | 韩檬 杨焘 魏峰 张卫江 |
| |
| 作者单位： | 天津大学,化学工程研究所,天津,300072 |
| |
| 摘 要： | 为了尽量减小资源浪费及二次污染问题,对在甲苯氧化法生产苯酚过程中产生的大量苯甲酸废料,进行了闪蒸-减压精馏分离提纯处理。废料通过闪蒸,在210℃以下得到了富集苯甲酸馏分,在220—260℃之间得到了富集苯甲酸苄酯和芴酮馏分;之后对各馏分进行高真空减压精馏,得到了苯甲酸、苯甲酸苄酯和芴酮等产品,纯度分别可达95%,91%和92%。经熔融结晶精制后,苯甲酸纯度可达99.6%,苯甲酸苄酯和芴酮纯度均达95%以上。
|
| 关 键 词： | 苯甲酸 苯甲酸苄酯 芴酮 闪蒸 减压精馏 废料处理 |
| 文章编号： | 1005-9954（2007）07-0001-03 |
Separation of benzoic acid waste by flash-vacuum distillation |
| |
| HAN Meng,YANG Tao,WEI Feng,ZHANG Wei-jiang.Separation of benzoic acid waste by flash-vacuum distillation[J].Chemical Engineering,2007,35(7):1-3. |
| |
| Authors: | HAN Meng YANG Tao WEI Feng ZHANG Wei-jiang |
| |
| Affiliation: | Chemical Engineering Research Center, Tianjin University, Tianjin 300072, China |
| |
| Abstract: | To reduce the wasting of resources and secondary pollution,the treatment of benzoic acid waste from the process of producing phenol by oxygenation of toluene was carried out by flash-vacuum distillation.After enriched by flash, benzoic acid-containing fraction was obtained below 210 ℃ and benzyl benzoate-fluorenone-containing fraction was between 220 and 260 ℃,then these fractions were separated by vacuum distillation respectively.Benzoic acid,benzyl benzoate and fluorenone were obtained with purity of 95%,91% and 92%,respectively.After refined by melt crystallization,the purity of benzoic acid could reach 99.6%,and that of benzyl benzoate and fluorenone were both over 95%. |
| |
| Keywords: | benzoic acid benzyl benzoate fluorenone flash vacuum distillation waste treatment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
