问题：请教怎么干燥或者提纯四氯乙烯啊
类型：求助 (悬赏分:3分)
提问：xiaoxin
等级：▲
版块：基本操作、分离技术(qixie,wanghong,)
信誉：17%
回复：3
阅读：826
时间：2005-05-13 10:42:23 编辑加入/取消收藏订制/取消短消息举报该贴

我的实验需要这个溶液，可是不知道怎样干燥或者应该叫提纯。请大家指教。谢谢！

回复人：admin,★ (论坛管理员-欢迎大家访问化学化工论坛) 时间：2005-05-14 08:21:38 编辑

1楼

在书籍中有这个东西的纯化方法：

Tetrachloroethylene [127-18-41 M 165.8, b 121.2O, d15 1.63109, d 1.623, n15 1.50759, n
1.50566 It decomposes under similar conditions to CHC13, to give phosgene and trichloroacetic acid.
Inhibitors of this reaction include EtOH, ethyl ether and thymol (effective at 2-5ppm). Tetrachloroethylene
should be distd under a vac (to avoid phosgene formation), and stored in the dark out of contact with air. It can
be purified by washing with 2M HCI until the aq phase no longer becomes coloured, then with water, drying
with Na2C03, Na2S04, CaC12 or P2O5, and fractionally distilling just before use. 1 , l ,2-Trichloroethane and
l , l , 1 ,2-tetrachloroethane can be removed by counter-current extraction with EtOH/water.

回复人：admin,★ (论坛管理员-欢迎大家访问化学化工论坛) 时间：2005-05-14 08:22:59 编辑	2楼
http://www.ccebbs.com/forum/search.asp?topicclass=0&sort=1&query=purifica&userfrom=&action=search

回复人：xiaoxin,▲ (新手上路，请多关照！谢谢！) 时间：2005-05-14 16:10:54 编辑	3楼
谢谢你。可以加分。呵呵！

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