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›› 2003, Vol. 3 ›› Issue (1): 0-0.

• 1 •    

结晶法分离精制混合植物甾醇中b–谷甾醇和豆甾醇

许文林, 黄一波, 钱俊红, 沙鸥   

  1. 扬州大学化学化工学院，江苏 扬州 225002
  • 出版日期:2003-02-20 发布日期:2003-02-20

Separation and Purification of Stigmasterol and b-Sitosterol from Phytosterol by the Crystallization Method

XU Wen-lin, HUANG Yi-bo, QIAN Jun-hong, SHA Ou   

  1. 1. College of Chemistry & Chemical Engineering, Central South University, Changsha, Hunan 410083, China;2. Department of Mineral Engineering,Central South University, Changsha, Hunan 410083, China
  • Online:2003-02-20 Published:2003-02-20

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摘要： 利用豆甾醇和b–谷甾醇在正戊醇和环己酮中的溶解性差异以及两种甾醇在环己酮中溶解度对温度的依赖性不同，研究了以正戊醇和环己酮为溶剂，用结晶法从精制植物甾醇中分离豆甾醇和b–谷甾醇的工艺方法. 实验结果表明，以环己酮为溶剂，混合植物甾醇经过3次分级结晶后，b–谷甾醇含量达到87%；以环己酮或正戊醇为溶剂，通过5次重结晶后，豆甾醇含量达到92%.

关键词: 豆甾醇, b–谷甾醇, 分离, 结晶

Abstract: Influences of HNO3, H2O2 and BTA concentrations on filming of copper surface and CMP process were studied by electrochemical methods. Cu EIS in various media were examined. Relations of corrosion current density to polishing pressures and rotative rates were investigated. Changes of corrosion potential and polarization curves were explored. Electrochemical mechanisms of CMP were explained by changes of electrochemical variables such as corrosion potential and corrosion current density. The formula of 1% HNO3+1% BTA+0.2% H2O2+5% g-Al2O3 was confirmed to be feasible and reasonable.

Key words: stigmasterol, b-sitosterol, separation, crystallization

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