共查询到19条相似文献,搜索用时 78 毫秒
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分子蒸馏技术及其应用的研究进展 总被引:8,自引:0,他引:8
分子蒸馏是一种在高真空下进行的特殊蒸馏技术。分子蒸馏是一项国内外正在工业化开发应用的高新分离技术 ,尚未实现大规模的工业化。分子蒸馏技术同普通蒸馏技术的差别很大。介绍了分子蒸馏基本原理、技术特点、主要装置和优势。此外还详细介绍了分子蒸馏技术在国内外的应用新进展 ,并提出了未来分子蒸馏领域的重点研究方向。 相似文献
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分子蒸馏技术的发展及研究现状 总被引:21,自引:0,他引:21
分子蒸馏技术是近几十年发展起来的一种先进的液液分离技术。该文从其原理特点、装置结构类型、工业化应用及研究现状等方面 ,对分子蒸馏技术作一全面综述。最后提出国内分子蒸馏技术工业化应用中存在的问题及解决方法 相似文献
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分子蒸馏技术在多领域应用的研究进展 总被引:1,自引:0,他引:1
《化工技术与开发》2018,(12)
本文对分子蒸馏技术近年来的发展与应用进行了归纳总结,概述了分子蒸馏技术在石油化工、食品、医药、农业及香料领域的最新应用与研究,讨论了分子蒸馏技术在各领域应用的优劣性,对分子蒸馏技术的进一步发展进行了展望。 相似文献
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分子蒸馏器中加入刮膜器可以增强分子蒸馏过程中的传质效率。以辊筒式刮膜器作为研究对象,利用进料流量、液体浓度、刮膜电机转速以及蒸发器尺寸等主要因素之间的结构关系,建立刮膜式分子蒸馏的数学模型。通过将实验参数代入到该模型可以快速计算出分子蒸馏后流出浓度,并将计算出流出浓度与实际浓度相比较,误差范围缩小到1.5%~2.5%之间,为寻找最佳控制条件提供了参考。将该模型通过MATLAB依次调整每一个参数,研究每一个结构参数对分子蒸馏过程的影响,通过研究仿真图像的变化趋势,使分子蒸馏器的设计可以精确到具体数值,为刮膜式分子蒸馏器的设计提供了依据。 相似文献
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Semi‐refined rapeseed and sunflower oils after degumming and bleaching were refined by deodorization and deacidification in two ways, i.e., by steam vacuum distillation in the deodorization column Lurgi and by molecular distillation in the wiped‐film evaporator. The oxidative stability of the oils before and after the physical refining has been evaluated using non‐isothermal differential scanning calorimetry. Treatment of the experimental data was carried out by applying a new method based on a non‐Arrhenian temperature function. The results reveal that refining by molecular distillation leads to lower oxidative stability of the oils than refining by steam vacuum distillation. Practical applications : (i) A method for the refining of edible oils by the molecular distillation in the wiped film of a short‐path evaporator is presented and applied. (ii) Oxidative stability of the oils refined by molecular distillation and steam vacuum distillation is compared. It has been found that refining by molecular distillation leads to lower oxidative stability of the oils than refining by steam vacuum distillation. (iii) Experimental data were treated by applying a new method based on a non‐Arrhenian temperature function. The method enables trustworthy predictions of oil stabilities for the application temperatures. 相似文献
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分子蒸馏是一种新型的分离技术,与传统的分离技术相比:操作温度远低于液体沸点,蒸馏压力在极高真空度下,受热时间短,系统基本绝氧,能最大限度地保证物系中的有效成分。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。 相似文献
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Monoglycerides which were obtained by different methods were fractionated by means of molecular distillation. The elimination temperatures of glycerol, fatty acids and monoglycerides have been determined. The parameters of molecular distillation were found to obtain high concentrated monoglycerides. The characteristics of monoglyceride destillates and distillation residues have been evaluated. 相似文献
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