内部沸腾强化肉桂皮中肉桂醛的提取工艺及机理

用少量乙醇溶液润湿肉桂皮,然后加入热水,使渗透到肉桂皮微孔内的乙醇溶液沸腾,强化提取过程。实验结果表明,肉桂醛提取得率为2.43%,高于传统水提法。提取一次所需时间仅为1~5 m in,达到或者超过微波等非常规手段强化的效果。通过对热水温度的影响分析,发现内部沸腾时,提取速率发生突变,这种突变是由于孔内沸腾时产生对流引起的。

Technology and Mechanism of Extracting Cinnam Aldehyde from Cinnamomum cassia Presl Bark by Means of Inner Boiling

A new method of extracting cinnam aldehyde from Cinnamomum cassia Presl bark was put forward. First, C. cassia P. bark was moistened with small amount of ethanol-water, then hot-water was added, so that ethanol-water solution inside the bark was boiled and the process of extraction was strengthened. The experimental results indicated that extraction yield which was higher than that of traditional water-extraction, was 2.43 %. Only 1-5 min was spent in each time of extraction, which is less than that of unconventional extraction methods such as microwave method. By analyzing the effect of temperature of hot water, it was found that a sudden rise of extraction rate occurred through convection when inner solution was boiled.