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molecular distillation是什么意思,molecular distillation的意思翻译、用法、同义词、例句

输入单词

常用词典

  • [冶] 分子蒸馏;高真空蒸馏

  • 例句

  • OBJECTIVE Introduce the application process of molecular distillation in natural medication separation and purification in China.

    目的介绍国内分子蒸馏技术在天然药物分离纯化中的应用状况。

  • This paper mainly introduces the basic principle and characteristics of molecular distillation technology as well as its applications in coatings and resin industry.

    介绍了分子蒸馏技术原理、特点及其在涂料和树脂工业中的典型应用实例。

  • Molecular distillation is a new separation technique in internation, It can realize the separation substances which cannot be separates by ordinary distillation methods.

    分子蒸馏是国际上一种新型的分离方法,它可以使一些常规蒸馏不能分离的物质实现分离。

  • Molecular distillation technology is a new separate method and has been widely used in light industry.

    分子蒸馏技术作为一种新兴的分离技术,在轻工行业得到越来越广泛的应用。

  • It is valuable to get the distribution of the velocity field, temperature field and concentration field that are formed in the process of molecular distillation.

    准确获得刮膜分子蒸馏器内流体的速度、温度及浓度分布具有十分重要的研究意义。

  • To meet the requirement of crystallization separation process for para-acetaminophenylacetate ethyl, molecular distillation was firstly used to separate the isomer.

    为满足对乙酰*********乙酸乙酯后续结晶分离工艺的需要,将分子蒸馏技术首次应用于同分异构体的预分离。

  • Purification of rose oil by molecular distillation was stu***d experimentally.

    应用刮膜式分子蒸馏装置对玫瑰精油的提纯进行了研究。

  • The paper discusses the molecular distillation process in the light of basic principle, equipment, influential factors and technological features and introduces its application in industry.

    本文主要对分子蒸馏的基本原理、设备、影响因素、及其技术特点进行了讨论,同时介绍了分子蒸馏在工业生产中的应用。

  • With the development of high vacuum technique, application and research on molecular distillation are carried out more and more deeply and widely.

    伴随着高真空技术的进步,人们对分子蒸馏技术的应用及研究越来越深入。

  • And the application field and scope of molecular distillation technology was also widened owing to the development of theories.

    随着基础理论的不断丰富,近几年分子蒸馏技术应用领域迅速扩大。

  • The invention process includes steps of degumming, methyl esterification, water washing, cold precipitation, dehydration, molecular distillation.

    本发明的工艺流程包括脱胶、甲酯化、水洗、冷析、脱水、分子蒸馏等步骤。

  • Molecular distillation(MD); Separation; Purification; Chinese medicine;

    分子蒸馏;分离;纯化;中药;

  • Among the various MD technologies, wiped film molecular distillation(WFMD) has the broadest application prospect.

    在各种分子蒸馏技术中,又以刮膜式分子蒸馏技术的应用前景最广阔。

  • RESULTS In China, molecular distillation has been applied in natural medication separation and purification further and wider and both it…

    结论分子蒸馏作为液—液热敏分离及高提纯的专用技术,其在天然药物分离纯化中的应用前景非常看好。

  • The article introduce structure, design calculation and control principle of preheater in Hight atmospheric molecular distillation equipment.

    本文介绍高真空分子蒸馏设备中预热器的结构、设计计算、控制原理。

  • The differences between molecular distillation and general distillation have been compared, and which provides a basis of selection for popularizing the technique in industrial use.

    特别对比了分子蒸馏与一般蒸馏的区别,从而为工业化应用推广提供了选择依据。

  • The applications of the progress of molecular distillation in food industry is also summarized.

    并综述了分子蒸馏在食品工业中的应用进展。

  • The application of molecular distillation technology is reported in heat-sensitive chemicals, food and drug, chemical industry products and the aftermath of natural spices industry in this paper.

    介绍了分子蒸馏技术在热敏性有机化合物的提纯、食品和医药方面的分离纯化、精细化工产品、天然香料后处理等方面的应用现状。

  • The technological conditions for industrial purification of cinnamaldehyde from cinnamon oil by molecular distillation have been investigated.

    文章研究了以分子蒸馏法纯化桂油的工艺条件,并在此基础上实现了高纯度肉桂醛的生产。

  • This paper introduces the structure, working principle, process flow of inner circulating falling-film molecular distillation equipment.

    主要就内循环降膜式分子蒸馏内循环设备的结构、工作原理、生产工艺流程作简明阐述。

  • This article introduces the basic principle of The Molecular Distillation Technology which differs from that of ordinary distillation with a series of characteristics.

    介绍了分子蒸馏技术的基本原理及其有别于一般蒸馏技术的特点。

  • In this paper, molecular distillation, the use of the material and capsanthin in spicy substances pigment molecules and the difference between free-range separation and purification.

    本文采用分子蒸馏法,利用辣椒红色素中辣味物质与色素类物质的分子自由程差异而分离提纯。

  • 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( 简称E P A) 、二十二碳六烯酸( 简称D H A)乙酯的分离提纯。

  • A computer-aided molecular design (CAMD) approach of solvents for extractive distillation is established for the systems of close boiling compounds or azeotropes.

    本文针对近沸点或共沸物系萃取精馏溶剂的选择问题进行了计算机辅助分子设计。

  • Solvent selection methods of extractive distillation, such as experimental method, databank inquiry method, empirical value method, and computer aided molecular design method, are reviewed.

    介绍了萃取精馏溶剂的筛选方法如实验法、数据库查询法、经验值方法、计算机辅助分子设计法等,并论述了各种方法的优缺点。

  • Established the conception of the efficiency of a pass through molecular distillation amount to the desired purity through several passes through the molecular still.

    提出一次分子蒸馏过程相当于一块高效塔板的概念,经过多次蒸馏,馏出物纯度可以达到目标含量。

  • 专业解析

    分子蒸馏(molecular distillation)是一种在高真空环境下利用物质分子平均自由程差异实现分离的特殊蒸馏技术。其核心原理基于分子运动特性:当混合物受热挥发时,轻重组分的分子在真空条件下具有不同的运动路径长度,轻质分子能直接到达冷凝表面,而重质分子因自由程较短会落回液相,从而实现高效分离。

    该技术具有三大显著特性:

    1. 低温操作:工作压力可低至0.001-0.1毫巴,沸点比常规蒸馏降低150-300℃,特别适用于热敏性物质(如维生素E、鱼油Omega-3)的提纯。美国化学学会(ACS)的研究显示,这种低温特性可有效保留生物活性成分。
    2. 短时接触:物料在蒸发面停留时间仅数秒至数十秒,大幅降低热分解风险。德国UIC GmbH的技术文档指出,这种瞬时处理能力是医药中间体纯化的关键优势。
    3. 分离精度:可处理沸点差小于5℃的组分,分离效率达90%以上。英国《化学工程研究进展》(Chemical Engineering Research and Design)的多篇论文证实了其在精细化工领域的不可替代性。

    工业应用主要集中在:

    注: ACS Publications《分子蒸馏技术进展》专题报告; UIC GmbH技术白皮书第5.2章; 《Perry's Chemical Engineers' Handbook》第13版蒸馏章节。

    网络扩展资料

    分子蒸馏(Molecular Distillation)是一种在高真空条件下进行的特殊蒸馏技术,主要用于分离热敏性或高沸点物质。其核心原理基于分子运动自由程的差异,而非传统蒸馏的沸点差异。

    核心原理

    1. 分子自由程差异:在真空环境下,不同分子量的物质因分子平均自由程不同而分离。轻分子运动路径长,优先到达冷凝面;重分子则难以到达,从而实现分离。
    2. 操作条件:通常在低于0.01 mmHg的极高真空下进行,蒸发温度显著低于常压沸点,减少热分解风险。

    技术特点

    应用领域

    1. 精细化工:如提纯肉桂油中的肉桂醛。
    2. 食品与医药:用于浓缩维生素E、鱼油DHA等活性成分。
    3. 材料科学:制备高纯度高分子材料,如超高分子量聚乙烯。

    公式表示

    分子蒸馏的关键参数可通过以下公式描述: $$ lambda = frac{kT}{sqrt{2} pi d P} $$ 其中,$lambda$为分子平均自由程,$k$为玻尔兹曼常数,$T$为温度,$d$为分子直径,$P$为系统压力。

    如需进一步了解工艺参数优化(如温度、真空度设置),可参考具体实验研究。

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