超临界CO2萃取的研究进展

超临界CO2流体萃取技术是近年来兴起的一项具有精馏和萃取两过程的高新物质分离精制技术，文章主要通过对各类超临界CO2流体萃取实验的文献报道和实验操作进行分析，对超临界CO2流体革取技术的原理、特点和超临界CO2流体萃取的主要影响因素及其优化方法和经验模型进行了综述。     

超临界CO2流体萃取中的在线检测技术

综述了超临界CO2流体萃取中的在线检测技术,介绍了超临界CO2流体萃取与超临界流体色谱、气相色谱、高效液相色谱、核磁共振、近红外光谱等技术的联用在线检测,阐述了在线检测技术的优越性,提出了如何发展超临界CO2流体萃取中的在线检测技术。     

超临界CO2流体萃取装置的污染分析与控制

针对超临界CO2流体萃取装置的工艺特点，分析了超临界CO2流体萃取装置中主要污染物的组成种类及其主要来源，指出噪声是超临界CO2流体萃取装置的主要污染物，同时提出从污染源着手，控制和减少超临界CO2流体萃取装置污染的一些措施。     

超临界CO2萃取的研究进展

通过对各类超临界CO2流体萃取实验的文献报道和实验操作进行分析,对超临界CO2流体萃取技术的原理、特点和超临界CO2流体萃取的主要影响因素及其优化方法和经验模型进行了综述.     

超临界CO2络合萃取重金属研究进展

超临界流体萃取作为一种新型分离技术,不能直接萃取重金属等离子型物质,但能萃取离子与配合剂反应生成的配合物。将配合反应与超临界CO2流体萃取结合形成了又一门新型的萃取技术—超临界CO2络合萃取。在总结国内外文献的基础上,介绍了超临界CO2络合萃取重金属的原理、影响因素以及最新进展情况。     

超临界CO2流体萃取装置的污染分析与控制

针对超临界CO2流体萃取装置的工艺特点,分析了超临界CO2流体萃取装置中主要污染物的组成种类及其主要来源,指出噪声是超临界CO2流体萃取装置的主要污染物,同时提出从污染源着手,控制和减少超临界CO2流体萃取装置污染的一些措施.     

超临界萃取新技术在中药提取分离中的应用

本文论述了超临界萃取中药提取在中药产业化形势及应用新技术的意义,超临界CO2流体萃取新技术在中药提取分离中的应用及其优越性。同时阐述了超临界CO2流体萃取技术在中药提取分离及中药现代化中的应用方式及前景。     

超临界流体萃取技术的应用

介绍了超临界CO2萃取技术的优点及使用的改性剂,对超临界流体萃取技术在医药工业、食品工业、环境保护中的应用进行了详细阐述,指出应加快超临界流体萃取技术应用的产业化步伐。     

超临界CO2流体萃取的应用进展

超临界CO2流体萃取技术已成为一种新兴分离技术,具有操作简单、快速、效率高、无毒、无污染等优点使其广泛应用于各个领域。文章主要介绍了超临界CO2流体萃取技术的原理及优点,综述了近年来超临界流体萃取技术在食品工业、天然香料工业及中草药开发中的应用,并进行了展望,指出了存在的问题和今后发展的趋势。     

超临界萃取技术及其应用

回顾了超临界流体（SCF）的研究历史,介绍了超临界流体的特性,分析了一元和三元体系的高压相图,简述了超临界流体萃取技术的原理、萃取过程和技术特点,并举例说明了CO2超临界流体在天然药物成分提取中的应用。     

超临界二氧化碳萃取在石油工业中的应用探究

随着化工工程的发展,超临界技术得以发展并被广泛的应用到了各个领域之中,尤其是石油化工行业。二氧化碳、乙醇、丙烯等气体都可作为流体萃取的溶剂,而在石油工业中,二氧化碳萃取具有独特的优势。对以二氧化碳为溶剂的超临界流体萃取技术在石油工业中的应用情况进行分析与探究。     

超临界流体萃取技术的发展现状

超临界流体萃取作为一种新型的分离技术,越来越受到各行业的关注和重视,并已广泛应用于医药、食品、化妆品及香料工业等领域.作者对超临界流体萃取技术进行了评述,主要从超临界CO2流体萃取技术的原理、工业应用及其强化过程等几个方面,介绍了国内外关于超临界流体分离技术的最新研究动态,最后针对超临界萃取技术应用现状,探讨了其目前存在的问题及应用前景.     

超临界二氧化碳萃取蛋黄油实验研究

介绍超临界二氧化碳萃取技术提取蛋黄油的工作原理及工艺流程.设计了正交实验,考察了萃取压力、萃取温度、萃取时间等参数对萃取率的影响,确定了最佧工艺条件.     

超临界二氧化碳萃取蛋黄油实验研究

介绍了超临界二氧化碳萃取技术提取蛋黄洫的工作原理及工艺流程。设计了正交实验.考察萃取压力、萃取温度、萃取时间等参数对萃取率的影响,确定了最佳工艺条件。     

国内超临界CO_2萃取技术工业化现状及存在问题

本文阐述了我国超临界CO2萃取技术及其工业化现状,着重分析了超临界CO2萃取技术大型工业化过程中所存在的问题,并对超临界CO2萃取技术的工业化前景作了分析。     

A STUDY ON SUPERCRITICAL FLUID EXTRACTION OF L-PROLINE

The extraction of L-proline from the fermentation broth filtrate with the supercritical fluid was studied. It has been proved that L-proline and most amino acids are hardly dissolved in the pure supercritical carbon dioxide fluid. When the methyl alcohol was added as an entrainer in L-proline solution or carbon dioxide fluid, the solubility of L-proline in the supercritical fluid would be greatly increased, but ethyl alcohol was unsatisfactory as an entrainer.The influences of extraction pressure, temperature, time, flow rate of fluid, concentrations of L-proline and entrainer on the yield of L-proline have been investigated for searching the optimal extraction conditions.     

SIMULATION AND PROCESS OPTIMIZATION OF A MEMBRANE-BASED DENSE GAS EXTRACTION USING HOLLOW FIBER CONTACTORS

Supercritical fluid and membrane technology coupling is a relatively new concept applicable to solvent separation and solute extraction. In these processes a hydrophobic or hydrophilic macroporous membrane is used as a two-different-nature solutions contactor. This methodology is an alternative to conventional liquid solution supercritical fluid extraction processes, which are associated with high investment costs. In the present work, a membrane-based supercritical fluid extraction module is modeled, simulated, and optimized as an independent industrial-scale operational unit. UniSim design suite R390 software from Honeywell was used as the platform for the simulation. Acetone and ethanol literature extraction results and methanol experimental extraction results (27.6% to 14.5% with a 10 wt.% aqueous solution; 7.1% to 5.9% with a 500 ppm aqueous solution) were used for validation of the model and definition of the semi-empirical equation parameters. The generated industrial-scale system optimization, which used a modular membrane arrangement, was strongly dependent on thermodynamic, economic, and energetic variables (higher mass transfer resistance in the carbon dioxide phase increased the number of membranes needed; process feasibility was affected by the number of membrane units, carbon dioxide flow rate, and product added value; compression energy requirements affected the optimization result). The modeled system proved to be an important aid in the design, scaling, and optimization of systems that use membranes as phase contactors in liquid solution supercritical carbon dioxide extraction.     

超临界CO_2萃取苕叶细辛挥发油

采用正交实验法对超临界CO2萃取苕叶细辛挥发油的条件进行了研究。考察了萃取温度、压力、CO2流量等因素在不同水平下对苕叶细辛挥发油提取率的影响。得到了超临界CO2萃取苕叶细辛挥发油的最佳实验条件:萃取压力20MPa,温度40℃,CO2流量35kg/h和萃取时间80min,得率为1 72%。水蒸气蒸馏提取得率为0 24%。超临界CO2萃取的收率高,萃取时间短。     

Extraction of Fatty Acids from <Emphasis Type="Italic">Boletus edulis</Emphasis> by Subcritical and Supercritical Carbon Dioxide

Mushrooms contain many valuable compounds such as fatty acids, carbohydrates, lycopene, lovastatin, trace elements etc. As they are currently valued for biologically active substances, and as high pressure carbon dioxide fluid extraction has been documented as an effective method for preparing bioactive products from plant materials, subcritical and supercritical carbon dioxide extraction of Boletus edulis mushroom was performed. In the extracts obtained, the fatty acids were determined. Response surface methodology (RSM) was applied to investigate the effect of pressure and extraction time on the extraction yield. The analysis of variance showed that pressure and extraction time had a significant effect on the extraction yield in both investigated process. The interaction between pressure and extraction time had a significant effect only in supercritical extraction process of B. edulis. Higher extraction yields have been obtained by subcritical carbon dioxide, and higher linoleic acid content has been determined in extracts obtained by supercritical carbon dioxide.