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.

最后采用萃取精餾的方法，對(duì)甲醇-碳酸二甲酯的二元共沸混合物進(jìn)行了分離提純研究，以毒性較低的乙酸異戊酯為萃取劑，采用兩塔連續(xù)萃取精餾操作，結(jié)果表明黄色网站免费别的女教师，分離效果比較理想。

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.

對(duì)巴山冷杉針葉水蒸氣蒸餾和石油醚萃取所得精油的GC-MS 分析對(duì)比研究結(jié)果表明：石油醚萃取精油主要成分為：莰烯精品国产视色，a-蒎烯，乙酸龍腦酯国产剧情精品视频，檸檬烯黄色网站免下载，1-甲基-4-異丙基-1，4-環(huán)己二烯h动漫视频，月桂烯www.屌，石竹烯，龍腦操女生在线免费看。

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

介紹了直接加入電石測(cè)定焦油水分的稱量法免费一级操逼毛片，并且與蒸餾法進(jìn)行了對(duì)照，用新方法測(cè)定的焦油樣免费看国产曰批40分钟视频，其精密度和準(zhǔn)確度較高A片黄色视频免费。

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...

結(jié)果表明水蒸汽蒸餾是效果最佳的脫腥方法，它可使蛇油揮發(fā)性成分的量降至脫腥前的38%www.久久,com，使腥味的主要成分減少60%~100%不卡免费A片观看在线播放，同時(shí)較大程度地保留了多不飽和脂肪酸。

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.

采用水蒸氣蒸餾法提取山柰揮發(fā)油在线69，用氣相色譜-質(zhì)譜聯(lián)用技術(shù)進(jìn)行測(cè)定禁止理伦18，并用色譜峰面積歸一法確定各化學(xué)成分的相對(duì)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餾法研究了二十碳五烯酸国产欧美十八禁、二十二碳六烯酸乙酯的分離提純欧美一区黄片视频。

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

通過對(duì)比得出同時(shí)蒸餾萃取法比水蒸氣蒸餾法更有利于蝦頭風(fēng)味物質(zhì)的提取。

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

目的采用水蒸氣蒸餾和二氧化碳超臨界萃取方法提取薰衣草精油国产真实偷乱视频老人，比較其體外抗氧化作用日韩国产欧美精品。

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

分子蒸餾技術(shù)是一種在高真空條件下進(jìn)行的連續(xù)蒸餾過程，適合于分離高沸點(diǎn)先锋5566资源网站资源、熱敏性及具有生物活性的混合物激情综合五月天丁香婷婷。

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

最后對(duì)南京綠天源生物化工工程有限公司的乳酸煉制工藝的流程和技術(shù)特點(diǎn)進(jìn)行了簡(jiǎn)要介紹国产专区久久。