共查询到20条相似文献,搜索用时 15 毫秒
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离子液体作为一种绿色溶剂可以有效地解决目前存在的能源和环境问题。由于离子液体相对于其它有机溶剂具较好的化学稳定性,使其在众多的研究领域受到越来越多的关注。但是离子液体存在着合成成本较高、回收难度较大等技术瓶颈问题,因而阻碍了它的广泛应用。而安全、有效地回收离子液体能够解决这一难点。离子液体的回收方法有减压蒸馏、膜分离、盐析、液液萃取等。离子液体的有效回收可以促进化学合成、纤维素提取等领域的快速发展。 相似文献
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Ananda S. Amarasekara 《Israel journal of chemistry》2019,59(9):789-802
The ionic liquids have emerged as new solvents and catalysts for processing biomass to value added chemicals and fuels. This review will present the recent developments in applications of ionic liquids in lignocellulosic biomass pretreatments, depolymerization, biodiesel synthesis, dehydration of carbohydrates to renewable feedstock chemicals as well as further transformations of biomass derived feedstocks such as furfural, 5‐hydroxymethylfurfural and levulinic acid to value added chemicals. In addition, the recycling of ionic liquids used in biomass processing is also discussed in the review. 相似文献
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手性功能化离子液体的合成进展 总被引:1,自引:0,他引:1
手性离子液体作为功能化离子液体的一种,综合了离子液体与手性物质两方面的特性。不仅具有手性特征,而且几乎无蒸气压,无可燃性,具有很高的热力学和化学稳定性,电导率高,可以循环使用,对无机和有机物有良好的溶解性、稳定性等。手性离子液体可以作为手性溶剂,催化剂载体或手性诱导剂,应用于手性合成、手性分离和手性催化等领域。本文综述了近些年来手性离子液体合成的最新进展,结构上按阴、阳离子分类,同一离子类型中按物质种类分类。同时介绍了一些新的合成技术。最后对手性离子液体可能的发展趋势和以后的研究方向进行了展望。 相似文献
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Ionic liquids are still a relatively new and very promising class of substances which have received increased research attention in recent years. Due to their unique physical and chemical properties these compounds are ideal for use in industrial applications and also offer a variety of very interesting possibilities in process technology, with a high potential of increasing performance and reducing investment and operating costs [1]. Ionic liquids are remarkable for their high chemical inertness and good lubricity. Therefore, one very promising application is the lubricated compression of oxygen as an alternative to the dry compression technique that has to be used because of the extremely high reactivity of pure oxygen with organic lubricating media. A screening of the relevant parameters including thermal stability, flammability, chemical inertness to pure oxygen, corrosiveness, tribological behavior and oxygen solubility was performed. Based on the results obtained, the most suitable ionic liquid was identified and used in a screw compressor setup that achieves a final pressure of 30 bar with a delivery volume of up to 200 Nm3/h. 相似文献
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离子液体的应用研究进展 总被引:17,自引:0,他引:17
离子液体是在室温或室温附近下呈液态、具有离子特性的新型溶剂,具有超低蒸气压,也称为绿色溶剂。介绍了离子液体的历史发展、种类,论述了离子液体在化学反应、分离过程、电化学、高分子离子液体及其他领域中的应用。 相似文献
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Kenneth R. Seddon 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1997,68(4):351-356
The use of room-temperature chloroaluminate(III) ionic liquids, specifically 1-butylpyridinium chloride–aluminium(III) chloride and 1-ethyl-3-methylimidazolium chloride–aluminium(III) chloride, as solvents for clean synthesis and catalytic processes, particularly those applicable to clean technology, is becoming widely recognised and accepted. The design principles for room-temperature ionic liquids, some of their properties, and the rationale for using these neoteric solvents, are discussed here, and an indication of the scope of these solvents for future industrial processes is given. © 1997 SCI. 相似文献