将新戊酰氯氯化为制得的3-氯新戊酰氯在全回流的填充蒸馏塔中进行。
The chlorination of pivaloyl chloride to prepared 3-chloropivaloyl chloride was took place in a packed distillation column with total reflux.
提出了一种新型水气蒸馏回流仪，该仪器具有水气蒸馏、回流提取及分水等多种功能，且便于操作。经试用，效果良好。
The article developed a new type of steam distillation and reflux apparatus. This apparatus can finish the operations of steam distillation, reflux and watershed. The results were good.
有很好的气密性可在负压下反应方便地组装成蒸馏回流装置。
With very good air-tightness, can conduct reaction under negative pressure and easily assemble distillation, reflow device.
因此，丹皮中丹皮酚提取实验结论为：水蒸汽蒸馏法优于乙醇回流法；
Therefore, the experimental conclusion of extraction of paeonol was: the steam distillation method was better than the ethanol refluxing method;
因此，丹皮中丹皮酚提取实验结论为：水蒸汽蒸馏法优于乙醇回流法；
Therefore, the experimental conclusion of extraction of paeonol was: the steam distillation method was better than the ethanol refluxing method;
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