| 查看: 494 | 回复: 3 | |||
| 当前主题已经存档。 | |||
[交流]
请问,DMSO如何纯化?
|
|||
| 请问,DMSO如何纯化? |
» 猜你喜欢
science advances的AAAS系统上返修问题
已经有4人回复
LDPE黑十字为什么那么大
已经有0人回复
有机高分子材料论文润色/翻译怎么收费?
已经有234人回复
西南交通大学医学院2027年接收推荐免试攻读研究生(含直博生)
已经有159人回复
西南交通大学医学院2027年接收推荐免试攻读研究生(含直博生)
已经有159人回复
西南交通大学医学院2027年接收推荐免试攻读研究生(含直博生)
已经有157人回复
西南交通大学医学院2027年接收推荐免试攻读研究生(含直博生)
已经有152人回复
博士申请
已经有15人回复
【中科院杭州医学研究所27级博士招生】化学分析/生物材料与器件方向
已经有15人回复
静电纺丝膜厚度问题
已经有94人回复
常规静电纺丝制备
已经有106人回复
xiazaibaobao
至尊木虫 (职业作家)
- 应助: 22 (小学生)
- 金币: 36818.4
- 散金: 88
- 红花: 1
- 帖子: 3359
- 在线: 314.4小时
- 虫号: 133086
- 注册: 2005-12-13
- 性别: GG
- 专业: 有机分子功能材料化学
2楼2006-10-17 20:07:51
★
chemcccc(金币+1):thx
chemcccc(金币+1):thx
|
详细的处理步骤 Dimethyl sulfoxide (DMSO) [67-68-5] M 78.1, m 18.0-18.5°, b 75.6-75.8°/12mm, 190°/760mm, d 1.100, n 1.479. Colourless, odourless, very hygroscopic liquid, synthesised from dimethyl sulfide. The main impurity is water, with a trace of dimethyl sulfone. The Karl-Fischer test is applicable. It is dried with Linde types 4A or 13X molecular sieves, by prolonged contact and passage through a column of the material, then distd under reduced pressure. Other drying agents include CaH2, CaO, BaO and CaSO4. It can also be fractionally crystd by partial freezing. More extensive purification is achieved by standing overnight with freshly heated and cooled chromatographic grade alumina. It is then refluxed for 4h over CaO, dried over CaH2, and then fractionally distd at low pressure. For efficiency of desiccants in drying dimethyl sulfoxide see Burfield and Smithers [/ Org Chem 43 3966 1978\ Sato et al. / Chem Soc, Dalton Trans 1949 1986]. Rapid purification: Stand over freshly activated alumina, BaO or CaSO4 overnight. Filter and distil over CaH2 under reduced pressure (~ 12 mm Hg). Store over 4A molecular sieves. |
3楼2006-10-17 23:45:45
4楼2006-10-18 16:40:47










回复此楼