| 夹带剂性质对超临界二氧化碳萃取的影响 |
| |
| 引用本文： | 段先志,夏红英,罗平. 夹带剂性质对超临界二氧化碳萃取的影响[J]. 日用化学工业, 2004, 34(1): 40-43 |
| |
| 作者姓名： | 段先志 夏红英 罗平 |
| |
| 作者单位： | 江西科技师范学院,应用化学系,江西,南昌,330013 |
| |
| 摘 要： | 介绍了夹带剂在超临界CO2萃取中的作用和原理，分析了夹带剂分子极性、相对分子质量、分子体积及特殊分子结构等性质对超临界CO2萃取的影响，总结出夹带剂性质对萃取率的变化规律：夹带剂的分子极性越大，溶质在超临界CO2中的溶解度越大；夹带剂的相对分子质量、分子体积的增大，其在超临界CO2中的溶解度减小，萃取率减小；夹带剂中易形成氢键的特殊分子结构，可提高萃取率。
|
| 关 键 词： | 夹带剂 超临界二氧化碳 萃取率 分子极性 扩散系数 溶剂 溶解度 溶解能力 |
| 文章编号： | 1001-1803(2004)01-0040-04 |
| 修稿时间： | 2003-07-21 |
Effects of the property of modifiers on supercritical CO2 extraction |
| |
| DUAN Xian-zhi,XIA Hong-ying,LUO Ping. Effects of the property of modifiers on supercritical CO2 extraction[J]. China Surfactant Detergent & Cosmetics, 2004, 34(1): 40-43 |
| |
| Authors: | DUAN Xian-zhi XIA Hong-ying LUO Ping |
| |
| Abstract: | The effect and principle of the modifiers on the supercritical CO_2 extractionwere introduced and the impact of the property of modifiers(molecular polarity?molecular weight?molecular physical volume)on the supercritical CO_2 extraction were analyzed.The profile of extraction yield against property of the modified can be summarized as:The higer the polarity of the modifier,the higher solubility of solute in supercritical CO_2.Increase of molecular and/or molecular physical volume will result-in decreasc of solubility of solute in supercritical CO_2 and consequently the decrease of the extraction yield.In case the modifier contains special molecular structure that facilitates the formation of hydrogen bond,the extraction yield will increase. |
| |
| Keywords: | supercritical CO_2 extraction modifier molecular pole |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
