
[冶] 分子蒸餾;高真空蒸餾
OBJECTIVE Introduce the application process of molecular distillation in natural medication separation and purification in China.
目的介紹國内分子蒸餾技術在天然藥物分離純化中的應用狀況。
This paper mainly introduces the basic principle and characteristics of molecular distillation technology as well as its applications in coatings and resin industry.
介紹了分子蒸餾技術原理、特點及其在塗料和樹脂工業中的典型應用實例。
Molecular distillation is a new separation technique in internation, It can realize the separation substances which cannot be separates by ordinary distillation methods.
分子蒸餾是國際上一種新型的分離方法,它可以使一些常規蒸餾不能分離的物質實現分離。
Molecular distillation technology is a new separate method and has been widely used in light industry.
分子蒸餾技術作為一種新興的分離技術,在輕工行業得到越來越廣泛的應用。
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.
準确獲得刮膜分子蒸餾器内流體的速度、溫度及濃度分布具有十分重要的研究意義。
To meet the requirement of crystallization separation process for para-acetaminophenylacetate ethyl, molecular distillation was firstly used to separate the isomer.
為滿足對乙酰*********乙酸乙酯後續結晶分離工藝的需要,将分子蒸餾技術首次應用于同分異構體的預分離。
Purification of rose oil by molecular distillation was stu***d experimentally.
應用刮膜式分子蒸餾裝置對玫瑰精油的提純進行了研究。
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.
本文主要對分子蒸餾的基本原理、設備、影響因素、及其技術特點進行了讨論,同時介紹了分子蒸餾在工業生産中的應用。
With the development of high vacuum technique, application and research on molecular distillation are carried out more and more deeply and widely.
伴隨着高真空技術的進步,人們對分子蒸餾技術的應用及研究越來越深入。
And the application field and scope of molecular distillation technology was also widened owing to the development of theories.
隨着基礎理論的不斷豐富,近幾年分子蒸餾技術應用領域迅速擴大。
The invention process includes steps of degumming, methyl esterification, water washing, cold precipitation, dehydration, molecular distillation.
本發明的工藝流程包括脫膠、甲酯化、水洗、冷析、脫水、分子蒸餾等步驟。
Molecular distillation(MD); Separation; Purification; Chinese medicine;
分子蒸餾;分離;純化;中藥;
Among the various MD technologies, wiped film molecular distillation(WFMD) has the broadest application prospect.
在各種分子蒸餾技術中,又以刮膜式分子蒸餾技術的應用前景最廣闊。
RESULTS In China, molecular distillation has been applied in natural medication separation and purification further and wider and both it…
結論分子蒸餾作為液—液熱敏分離及高提純的專用技術,其在天然藥物分離純化中的應用前景非常看好。
The article introduce structure, design calculation and control principle of preheater in Hight atmospheric molecular distillation equipment.
本文介紹高真空分子蒸餾設備中預熱器的結構、設計計算、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.
特别對比了分子蒸餾與一般蒸餾的區别,從而為工業化應用推廣提供了選擇依據。
The applications of the progress of molecular distillation in food industry is also summarized.
并綜述了分子蒸餾在食品工業中的應用進展。
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.
介紹了分子蒸餾技術在熱敏性有機化合物的提純、食品和醫藥方面的分離純化、精細化工産品、天然香料後處理等方面的應用現狀。
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餾法純化桂油的工藝條件,并在此基礎上實現了高純度肉桂醛的生産。
This paper introduces the structure, working principle, process flow of inner circulating falling-film molecular distillation equipment.
主要就内循環降膜式分子蒸餾内循環設備的結構、工作原理、生産工藝流程作簡明闡述。
This article introduces the basic principle of The Molecular Distillation Technology which differs from that of ordinary distillation with a series of characteristics.
介紹了分子蒸餾技術的基本原理及其有别于一般蒸餾技術的特點。
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.
本文采用分子蒸餾法,利用辣椒紅色素中辣味物質與色素類物質的分子自由程差異而分離提純。
In this study, urea inclusion method and molecular distillation method were applied in the purifications of ethyl ester of EPA and DHA.
用尿素沉澱法和分子蒸餾法研究了二十碳五烯酸( 簡稱E P A) 、二十二碳六烯酸( 簡稱D H A)乙酯的分離提純。
A computer-aided molecular design (CAMD) approach of solvents for extractive distillation is established for the systems of close boiling compounds or azeotropes.
本文針對近沸點或共沸物系萃取精餾溶劑的選擇問題進行了計算機輔助分子設計。
Solvent selection methods of extractive distillation, such as experimental method, databank inquiry method, empirical value method, and computer aided molecular design method, are reviewed.
介紹了萃取精餾溶劑的篩選方法如實驗法、數據庫查詢法、經驗值方法、計算機輔助分子設計法等,并論述了各種方法的優缺點。
Established the conception of the efficiency of a pass through molecular distillation amount to the desired purity through several passes through the molecular still.
提出一次分子蒸餾過程相當于一塊高效塔闆的概念,經過多次蒸餾,餾出物純度可以達到目标含量。
分子蒸餾(molecular distillation)是一種在高真空環境下利用物質分子平均自由程差異實現分離的特殊蒸餾技術。其核心原理基于分子運動特性:當混合物受熱揮發時,輕重組分的分子在真空條件下具有不同的運動路徑長度,輕質分子能直接到達冷凝表面,而重質分子因自由程較短會落回液相,從而實現高效分離。
該技術具有三大顯著特性:
工業應用主要集中在:
注: ACS Publications《分子蒸餾技術進展》專題報告; UIC GmbH技術白皮書第5.2章; 《Perry's Chemical Engineers' Handbook》第13版蒸餾章節。
分子蒸餾(Molecular Distillation)是一種在高真空條件下進行的特殊蒸餾技術,主要用于分離熱敏性或高沸點物質。其核心原理基于分子運動自由程的差異,而非傳統蒸餾的沸點差異。
分子蒸餾的關鍵參數可通過以下公式描述: $$ lambda = frac{kT}{sqrt{2} pi d P} $$ 其中,$lambda$為分子平均自由程,$k$為玻爾茲曼常數,$T$為溫度,$d$為分子直徑,$P$為系統壓力。
如需進一步了解工藝參數優化(如溫度、真空度設置),可參考具體實驗研究。
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