查询词典 distillation

In this study, the vapour–liquid equilibria behaviour of the binary systems dipropyl ether + 2-ethoxyethanol and 1-propyl alcohol + 2-ethoxyethanol and the ternary system dipropyl ether + 1-propyl alcohol + 2-ethoxyethanol was experimentally investigated with the aim of testing the feasibility of using 2-ethoxyethanol as an entrainer to the extractive distillation.

本文研究了2种二元体系（1：二丙醚+ 2-乙氧基乙醇；2：1-丙醇+ 2-乙氧基乙醇）和1种三元体系（二丙醚+ 1－丙醇+ 2-乙氧基乙醇）和的气液平衡行为，旨在测试2－乙氧基乙醇是否适合作为萃取性蒸馏的共溶剂。

Anhydrous magnesium chloride may be prepared from materials containing magnesium chloride such as magnesium chloride hydrate, carnallite or bittern by different dehydrating methods of organic solvent distillation or molecular sieve absorption, gas protective heating, discomposing the MgCl2-NH3 complex that can be composed from high boiling-point polar-solvent system...

无水氯化镁制备技术经历几十年不断的探索，取得了一些进步，但彻底改变耗能高、污染腐蚀严重、流程复杂的工艺过程，开发流程简单、低污染腐蚀、低成本的绿色工艺仍然需要更深入的研究。

The mechanism of molecular distillation was analyzed in this paper.Stationary,falling-film,the UIC and centrifugal molecular distillatory in common use,and also the application and the development tr...

本文分析了分子蒸馏技术的机理，介绍了目前常用的静止式、降膜式、刮膜式和离心式分子蒸馏器，以及分子蒸馏技术在化工、医药、轻工和食品行业的应用情况和发展趋势。

Stationary,falling-film,the UIC and centrifugal molecular distillatory in common use,and also the application and the development trend inchemical products,medicine,light industry and food industry of molecular distillation were introduced.

本文分析了分子蒸馏技术的机理，介绍了目前常用的静止式、降膜式、刮膜式和离心式分子蒸馏器，以及分子蒸馏技术在化工、医药、轻工和食品行业的应用情况和发展趋势。

The volatile oil was obtained from the seed of Fibraurea recite pierre by steam distillation. Twenty-six chemical constituents were identified by CC-MS. The relative content of docosane was the highest.

采用水蒸气蒸馏法提取大黄藤种子挥发油，结果表明：所得提取物经CC-MS检测出26种化合物，其中相对含量最高的化合物是二十二烷。

Objective To optimize the extraction process by determing the volatile oil yield of steam distillation and supercritical CO2 extraction from flowers of Elaeagnus angustifolia L..

目的 比较水蒸气蒸馏法和超临界CO2萃取技术从沙枣花中提取挥发油的得率，确定最佳提取工艺。

Through comparison of energy inputs in corn fuel ethanol life cycle,fossil energy inputs of corn production and ethanol conversion processes were identified as the most important,and therefore nitrogen fertilizer,electivity and diesel used in corn farming and energy consumption of distillation and dehydration process in ethanol production could be known as the most influential factors for the energy benefit of corn fuel ethanol.

但是玉米燃料乙醇从原料的生产、乙醇的转化，一直到被燃耗的整个生命周期中的多个阶段需要直接或间接地消耗矿物能源，因而，虽然玉米燃料乙醇是可再生能源，然而是否具有可持续性及可持续性的大小则取决于其燃耗中所产生的能量与燃料乙醇整个生命周期中所消耗的能量相比是否有盈余及盈余的大小。20世纪70年代中期，玉米燃料乙醇的能量平衡问题研究首次在美国出现[2，3]，当时乙醇替代汽油的能量效益的有关研究指

This article approaches the treatment of Cd-contained acid waste liquid from a precious metal plant of certain smelter and points out that distillation and electrolyze processes can be used in the recovery of Cdcontained acid waste liquid.

通过对某厂贵金属车间在生产过程中产生的含镉酸洗废液，进行治理试验研究，得出了通过蒸馏、电解的方法，可以实现含镉酸洗废液的回收利用，达到了闭路循环的目的。

Compared with the traditional process of esterify reaction, Employing the method of distillation with reaction can simplify the esterifying process, and save much energy and money.

结果表明，与传统的酯化反应过程相比较，采用反应精馏法可以简化酯化流程，节省大量能量和开支，是一项切实可行的方案。

Fit , the fractions in different temperature ranges were ingathered by rectifying wash oil azeotropic distillation were done with the different fractions and ethanediol respectively .

首先精馏洗油，切取不同温度段的馏分，然后分别与共沸剂乙二醇进行共沸精馏试验；在共沸精馏中，通过改变馏分与共沸剂的质量比和回流比，考察了不同条件对喹啉纯度的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。