常压SO_(3)微热爆技术在丹皮酚提取中的应用

Application of SO_(3) micro-thermal explosion technology in extraction of paeonol

采用常压SO_(3)微热爆技术对丹皮进行预处理,再经过水蒸气蒸馏提取丹皮酚,相比于仅水蒸气蒸馏提取丹皮酚的提取率提高了13%左右。利用元素分析和HNMR对提取的产物进行表征,证明该技术对丹皮酚的质量没有负效应;同时通过SEM对预处理前后的丹皮进行组织结构观察发现,微热爆技术使丹皮表皮结构脱落甚至内部的筛管破裂,从而有助于溶剂进入提取丹皮酚。对工艺参数进行优化得到最佳提取工艺:浸泡时间为1 h、颗粒粒径为0.85 mm、蒸馏时间为2.5 h,此时,丹皮酚提取产率达到近99%。

Bark of peony tree is pretreated by atmospheric pressure SO_(3)micro-thermal explosion technique,from which paeonol is obtained by steam distillation.The extraction yield of paeonol is about 13%higher than that by steam distillation without pretreatment.Characterization of the extracted products by means of elemental analysis and HNMR confirms that this technique has no negative effect on the quality of paeonol.The microstructure of peony tree bark before and after pretreatment is observed by SEM,and it is found that micro-thermal explosion technology causes the epidermal structure of peony tree bark to fall off and even breaks its inner screen,which is helpful for the solvent to enter the bark to extract paeonol.The process parameters are optimized as follows:the soaking time is 1 hour,the particle size is 0.85 mm,and the distillation time is 2.5 hours.Under optimal conditions,the extraction yield of paeonol approaches 99%.