共查询到20条相似文献,搜索用时 78 毫秒
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超临界技术在石油化工领域的应用 总被引:4,自引:0,他引:4
介绍了超临界流体的特性,重点论述了超临界化学反应、超临界萃取技术、超临界水氧化技术、超临界流体结晶技术等在石油化工领域的化学反应、炼油工业、环境保护、材料制备等方面的应用状况,并指出了超临界技术的发展方向。 相似文献
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超临界流体技术及其在生物工程中的应用 总被引:23,自引:0,他引:23
介绍了在生物工程有着广泛的应用前景的多种超临界流体技术,包括提取生物活性物质的超临界流体萃取,超临界条件二氧化碳中制备手性药物制备和淀粉水解制取葡萄糖的非水酶催化反应,超临界水条件下纤维素水解制备葡萄糖,超临界流体中的细胞破碎,制备缓释药物和色说载体的超临界流体溶液快速膨胀和气体抗溶剂结晶和沉淀技术。 相似文献
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超临界二氧化碳萃取器 总被引:2,自引:0,他引:2
介绍了超临界二氧化碳萃取及利用现有150L高压釜(压力20MPa)改造的超临界二氧化碳萃取器。据大量应用试验证明,经改造后的装置能满足操作压力低于20MPa的超临界二氧化碳萃取有机物的生产工艺需要,具有实际应用推广价值。 相似文献
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超临界流体在化学反应中的应用 总被引:1,自引:0,他引:1
综述了临界流体的性质及超临界流体在化学反应中一的些应用。主要介绍了超临界流体在F-T合成反应、1-己烯异构化反应、氧化反应和烷基化反应中的应用。 相似文献
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Willam E. Artz Robert M. Sauer Jr. 《Journal of the American Oil Chemists' Society》1992,69(4):309-313
An improved supercritical fluid micro-extraction cell of increased reliability was designed for on-line supercritical fluid
extraction and chromatography (SFE/SFC) of food and other lipid-related samples. The key components in the modified cell include
a Swagelok stainless steel reducing union with a dual ferrule as the cell, with polyetherether-ketone (PEEK) ferrules and
nuts to connect the cell to the control valve. The new cell did not leak under all conditions examined (100–500 atmospheres,
40–80°C), even after numerous extractions (>250). The quantitative performance of the cell was evaluated with fatty acid standard
solutions, technical grade fatty acid sources and wheat flour. The percent relative error (%RE) for the fatty acid standards
and technical-grade fatty acid samples was ≤6.0% for oleic, linoleic and linolenic acid. The %RE for oleic and linoleic acid
in the whole-wheat samples was ≤10%. The results demonstrate that the new extraction cell can be used for quantitative extractions
and that the sensitivity of the SFE/SFC technique is excellent. Similar SFE/SFC methods could prove useful in studying the
interaction of free fatty acids with various food components such as enzymes, amylose and proteins. 相似文献
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《分离科学与技术》2012,47(18):2741-2760
The main objective of this review is to approach and highlight the main applications of Supercritical Fluid Extraction (SFE) through the search in scientific papers and patents. The principles of the technique and the identification of the main works developed in different areas, such as food science, pharmaceuticals, chemical residues, biofuel, and polymers are presented. Additionally, it presents the new and innovative combined methods where SFE has been used, as well as the perspectives of this technology and the profile of countries that own the rights for the use of SFE through patent registration. In this review a compilation of the data extracted from 196 different scientific article and 594 patent documents, from a universe of 2.314 documents was done, showing the improvement of the technique in the last years. 相似文献