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yezhixingyu

金虫 (小有名气)

[求助] 如何理解这些话?

The aqueous mixture was washed twice with 100 ml of ethyl acetate and then the pH of the aqueous solution was reduced to less than 2 and extracted with 100 ml of ethyl acetate three times. The final three ethyl acetate layers were combined and dried over MgSO4 to reduce the volume to around 50 ml.
上述是一篇文献中对产物的处理方式,合成的产物带有邻苯酚二羟基的结构,想请教一下各位,如何理解上述操作,该如何实验哈!有机新手,忘帮忙!
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yezhixingyu

金虫 (小有名气)

引用回帖:
6楼: Originally posted by caominone at 2013-11-03 13:11:47
前2次洗的时候用烧杯就可以,萃取三次的时候用分液漏斗进行,后面的MgSO4 处理,你用烧杯就可以。...

哦,谢谢哈!
7楼2013-11-03 16:49:06
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caominone

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【答案】应助回帖

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感谢参与,应助指数 +1
紫百合LYL: 金币+1, 感谢应助 2013-11-03 13:27:58
yezhixingyu: 金币+5, ★★★很有帮助 2013-11-03 16:48:37
首先混合溶液用100ml乙酸乙酯冲洗两次,调节溶液PH值低于2,之后用100ml乙酸乙酯抽提3次,三次抽提的乙酸乙酯溶液层收集起来并且用MgSO4干燥,最终得到50ml。
锅可以背,但不能不明不白
2楼2013-11-02 11:43:37
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1104430281

铜虫 (正式写手)

引用回帖:
2楼: Originally posted by caominone at 2013-11-02 11:43:37
首先混合溶液用100ml乙酸乙酯冲洗两次,调节溶液PH值低于2,之后用100ml乙酸乙酯抽提3次,三次抽提的乙酸乙酯溶液层收集起来并且用MgSO4干燥,最终得到50ml。

应该是萃取三次而不是抽提三次

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3楼2013-11-02 19:46:43
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yezhixingyu

金虫 (小有名气)

引用回帖:
3楼: Originally posted by 1104430281 at 2013-11-02 19:46:43
应该是萃取三次而不是抽提三次
...

萃取和抽提有啥区别?
4楼2013-11-03 11:42:47
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