高校化学工程学报2001，Vol.15Issue(1)：11-16,6.
溶析结晶法分离提纯对二氯苯的研究
Separation of p-Dichlorobenzene from Isomer Mixtures by "Solventing-out" Processes
乐清华 1苏继新 2涂晋林1
作者信息
- 1. 华东理工大学化工系,
- 2. 山东大学环境工程系,
- 折叠
摘要
Abstract
A new separation process of p-dichlorobenzene from isomer mixtures(ODB) by using the "solventing-out" method has been examined to obtain p-dichlorobenzene with high purity. In this process, the mixtures of p-dichlorobenzene (PDCB) and o-dichlorobenzene (ODCB) were first dissolved in the 95% ethanol, and then PDCB were selectively crystallized from ethanol solution by the addition of water. The solubility of PDCB and ODCB in the aqueous ethanol solution was determined respectively. The effects of the feed weight ratio (DCB/ Ethanol), solvent volume ratio (H2O/Ethanol) and temperatures on the yield and purity of the PDCB crystals were observed and studied at different operation conditions. Experimental results showed that the purity of PDCB products can be enhanced up to 99.8% from 77～85% and its yield can be over 76 % under the conditions of the volume ratio of water to ethanol 0.25 ～ 0.30 and temperature 278 ～ 283 K.关键词
对二氯苯/邻二氯苯/结晶/溶析分类
化学化工引用本文复制引用
乐清华,苏继新,涂晋林..溶析结晶法分离提纯对二氯苯的研究[J].高校化学工程学报,2001,15(1):11-16,6.
