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求助翻译，10金币，机器翻译者勿扰
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有效期至当日晚上8：30 摘要：本论文对Wittig 反应后处理做了改进，利用副产物三苯基氧磷易结晶的特点，先用重结晶的方法除去大部分副产物三苯基氧磷后，再用柱层析色谱法纯化产物。我们发现该方法不但减少了硅胶和溶剂用量，而且分离效果很好，具有一定的环保和经济意义。 关键词：Wittig 反应，重结晶，合成，改进 [ Last edited by lixiaod001 on 2009-12-10 at 15:58 ] |
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goodtimega
铁杆木虫 (著名写手)
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lixiaod001(金币+3,VIP+0):翻译不错，但是超过规定时间了，换是给3金币谢谢你 12-11 08:20
lixiaod001(金币+3,VIP+0):翻译不错，但是超过规定时间了，换是给3金币谢谢你 12-11 08:20
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Abstract: this paper reports the improvement of the treatment of Wittig reaction. In connectionwith the readily crystallization characteristics of by-product(Triphenylphosphine oxide), most of by-products (Triphenylphosphine oxide) can be removed through the process of recrystallization. Consequently the product is purified by column chromatography. We find that this method not only reduces the dosage of silica gel and solvent, but also has a desirable separating effect, which is of environmental and economic significance. Keywords: Wittig reaction, recrystallization, synthesis, improvement |
4楼2009-12-11 02:00:05
syh9288
捐助贵宾 (著名写手)
海军上将
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lixiaod001(金币+7,VIP+0):谢谢参与，翻译可以，但是换的做修改 12-11 08:19
lixiaod001(金币+7,VIP+0):谢谢参与，翻译可以，但是换的做修改 12-11 08:19
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Abstract: this paper focus on improving the following treatment of Wittig reaction. due to the easily crystallizable characteristics of by-product( Triphenylphosphine oxide) ,through the process of recrystallization , most of by-products (Triphenylphosphine oxide) can be removed ,and then products are purified by column chromatography. We find that this method not only reduce the dosage of silica gel and solvent but also have a good separating effect,having a certain environmental and economic significance. Keywords: Wittig reaction, recrystallization, synthesis, improvement |
2楼2009-12-10 19:27:07