查询词典 distillation method

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

Compareing with essential oil of the steam distillation method and the bensine solvent extraction method through GC-MS analysis .The result showed that:the essential oil principal constituent extracted by benzine is camphene,a-pinene,bornyl acetate, limonene, 1-methyl-4-(1-methylethyl)-1,4-cyclohexadiene, myrcene, caryophyllene, borneol.

对巴山冷杉针叶水蒸气蒸馏和石油醚萃取所得精油的GC-MS 分析对比研究结果表明：石油醚萃取精油主要成分为：莰烯，a-蒎烯，乙酸龙脑酯，柠檬烯，1-甲基-4-异丙基-1，4-环己二烯，月桂烯，石竹烯，龙脑。

The gravimetry method by directly adding calcium carbide to determine the moisture content in tar was introduced, and was compared with the distillation method.

介绍了直接加入电石测定焦油水分的称量法，并且与蒸馏法进行了对照，用新方法测定的焦油样，其精密度和准确度较高。

The steam distillation method showed the best result which reduced the contents of the volatile cornpound to 38 percent of those in crude snake oil.This method reduced 60 to 100 percent of main odorous compounds,and retai...

结果表明水蒸汽蒸馏是效果最佳的脱腥方法，它可使蛇油挥发性成分的量降至脱腥前的38%，使腥味的主要成分减少60%~100%，同时较大程度地保留了多不饱和脂肪酸。

METHODS: Galanga Resurrectionlily Rhizome volatile oil was extracted by wet distillation method and determined by GC-MS , and the relative content of different constituents was determined by chromatographic peak area normalization method.

采用水蒸气蒸馏法提取山柰挥发油，用气相色谱-质谱联用技术进行测定，并用色谱峰面积归一法确定各化学成分的相对含量。

In this study,urea inclusion method and molecular distillation method were applied in the purifications of ethyl ester of EPA and DHA.

用尿素沉淀法和分子蒸馏法研究了二十碳五烯酸、二十二碳六烯酸乙酯的分离提纯。

It indicated that simultaneously distills extraction method was prior to steam distillation method in extraction.

通过对比得出同时蒸馏萃取法比水蒸气蒸馏法更有利于虾头风味物质的提取。

Methods the lavender oil was extracted through steam distillation method and supercritical co2 extraction method.

目的采用水蒸气蒸馏和二氧化碳超临界萃取方法提取薰衣草精油，比较其体外抗氧化作用。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

The extracting technology included calcium salt method and high vacuum distillation method, etc.

最后对南京绿天源生物化工工程有限公司的乳酸炼制工艺的流程和技术特点进行了简要介绍。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。