| 查看: 349 | 回复: 4 | |||
| 当前主题已经存档。 | |||
[交流]
求助翻译，10金币，机器翻译者勿扰
|
|||
|
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 ] |
回复此楼» 猜你喜欢
不要再数国自然申请书的 filecode 的分隔符个数了
已经有21人回复
-
投英文期刊如何查重
已经有5人回复
-
伯胺上甲基求助
已经有7人回复
-
生命口面上会评结束了吗大家有知道结果吗？现在还没有结果正常不？
已经有8人回复
-
跨出版社商投稿
已经有5人回复
-
5个%2F，非固定段22个字母
已经有7人回复
-
生命口C13面上会评时间
已经有10人回复
-
生生命学部会评
已经有4人回复
-
H口，面上，时间戳7月7日。
已经有3人回复
-
小木虫没落了，除了祈祷帖子，几乎看不到有价值的帖子
已经有14人回复
syh9288
捐助贵宾 (著名写手)
海军上将
- 翻译EPI: 6
- 应助: 2 (幼儿园)
- 金币: 1608.6
- 散金: 543
- 红花: 1
- 帖子: 1078
- 在线: 482小时
- 虫号: 735351
- 注册: 2009-03-30
- 性别: GG
- 专业: 有机合成
★ ★ ★ ★ ★ ★ ★
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
|
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
3楼2009-12-10 22:44:46
goodtimega
铁杆木虫 (著名写手)
- 翻译EPI: 4
- 应助: 1 (幼儿园)
- 金币: 8138.7
- 散金: 570
- 红花: 1
- 帖子: 1489
- 在线: 527.5小时
- 虫号: 820248
- 注册: 2009-08-02
- 专业: 高分子材料结构与性能
★ ★ ★
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
|
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
5楼2009-12-11 08:22:20