File:Toluene with sodium-benzophenone.jpg

来自Wikimedia Commons
跳转到导航 跳转到搜索

原始文件 ‎（1,200 × 1,600像素，文件大小：387 KB，MIME类型：image/jpeg）

说明

说明

添加一行文字以描述该文件所表现的内容

摘要

[编辑]
描述
English: Toluene is refluxed in sodium-benzophenone to remove oxygen and water, before being distilled. Photo taken 4 Sep 2006. Keywords: reflux, toluene, sodium, benzophenone, distillation, desiccation
  • A bottle of benzophenone by Lancaster.
    A bottle of benzophenone by Lancaster.
  • Toluene is refluxed with sodium and benzophenone to produce dry, oxygen-free toluene.
    Toluene is refluxed with sodium and benzophenone to produce dry, oxygen-free toluene.
  • The mixture is still not blue yet indicating that the reaction is not complete.
    The mixture is still not blue yet indicating that the reaction is not complete.
  • The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture.
    The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture.
  • After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask.
    After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask.

Category:desiccants

Category:distillation
日期 2006年9月4日 (原始上传日期)
来源 Transferred from en.wikipedia to Commons by omegakent.
作者 英语维基百科的Rifleman 82

许可协议

[编辑]
Public domain 本作品已被作者英语维基百科的Rifleman 82释出到公有领域。这适用于全世界。
在一些国家这可能不合法；如果是这样的话，那么：
Rifleman 82无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

原始上传日志

[编辑]

Transferred from en.wikipedia to Commons by omegakent.

The original description page was here. All following user names refer to en.wikipedia.
  • 2006-09-04 17:00 Rifleman 82 1200×1600× (396460 bytes) Taken in my lab on 4 Sep 2006.

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2009年8月11日 (二) 01:232009年8月11日 (二) 01:23版本的缩略图1,200 × 1,600（387 KB）Omegakent（留言 | 贡献）{{Information |Description={{en|Toluene is refluxed in sodium-benzophenone to remove oxygen and water, before being distilled. Photo taken 4 Sep 2006. Keywords: en:reflux, en:toluene, en:sodium, en:benzophenone, [[:en:distillation

您不可以覆盖此文件。

全域文件用途

以下其他wiki使用此文件：

元数据

此文件含有额外信息，这些信息可能是创建或数字化该文件时使用的数码相机或扫描仪所添加的。如果文件已从其原始状态修改，某些详细信息可能无法完全反映修改后的文件。

取自“https://commons.wikimedia.org/w/index.php?title=File:Toluene_with_sodium-benzophenone.jpg&oldid=681265697”