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正交试验优化活性炭吸附-乙醇重结晶法精制甘草酸单铵盐

史高峰,宫建辉,陈学福,王国英,王红玉   

  1. 兰州理工大学石油化工学院,甘肃 兰州 730050
  • 出版日期:2013-08-25 发布日期:2013-09-03

monoammonium glycyrrhizinate;crystallization;decolorizaiton;orthogonal array design

SHI Gao-feng,GONG Jian-hui,CHEN Xue-fu,WANG Guo-ying,WANG Hong-yu   

  1. Institute of Petro-chemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
  • Online:2013-08-25 Published:2013-09-03

摘要:

以含量66.72%、白度31.7的甘草酸单铵盐粗粉为原料,采用乙醇结晶、活性炭脱色、乙醇再次结晶的方法精制甘草酸单铵盐。通过单因素试验考察甘草酸单铵盐与活性炭物料比、脱色时间、脱色温度对甘草酸单铵盐脱色效果的影响,然后采用正交试验的方法,确定脱色的最佳工艺条件。结果表明:最佳工艺条件为:甘草酸单铵盐与活性炭物料比1:3、脱色温度75℃、脱色时间60min。通过重复实验验证,该工艺脱色效果好,工艺稳定,最终获得含量83.32%、白度74.2的甘草酸单铵盐,甘草酸单铵盐收率可达68.74%。

关键词: 甘草酸单铵盐, 结晶, 脱色, 正交试验

Abstract:

Crude powder containing 66.72% monoammonium glycyrrhizinate (MAG) and having a whiteness of 74.2
was purified using a procedure involving ethanol crystallization followed by activated carbon decolorization and ethanol
recrystallization to obtain a purity of 83.32% and a whiteness of 74.2. The effects of monoammonium glycyrrhizinate-to-activated
carbon ratio as well as adsorption time and temperature on decolorization efficiency were investigated by one-factor-at-a-time
method, and the optimum decolorization conditions were determined using orthogonal array design to be adsorption at 75 ℃ for
60 min with a monoammonium glycyrrhizinate-to-activated carbon ratio of 1:3. Repeated experiments under these conditions
indicated that the procedure was stable and effective at decolorizing monoammonium glycyrrhizinate with a recovery of 68.74%.

Key words: monoammonium glycyrrhizinate, crystallization, decolorizaiton, orthogonal array design