共查询到19条相似文献,搜索用时 46 毫秒
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绿色溶剂——离子液体及其应用 总被引:9,自引:0,他引:9
离子液体作为“绿色的、可设计性”溶剂越来越受到关注。本文介绍了离子液体种类、特性和制备,综述了离子液体在分离过程、电化学、化学反应及材料领域中的应用,展望了离子液体的应用前景。 相似文献
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主要阐述了离子液体的概念、性质及应用,并分析总结了离子液体在卤素交换氟化反应中的应用,提出了离子液体在氟化反应中具有广阔的应用前景。 相似文献
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Marina Cvjetko Bubalo Senka Vidović Ivana Radojčić Redovniković Stela Jokić 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2015,90(9):1631-1639
In many industrial processes, large quantities of volatile and flammable organic solvents are used in various reaction systems and separation steps defining a major part of the environmental and economic performance of a process. Accordingly, a growing area of research in the development of green technologies is devoted to designing new, environment‐friendly and tunable solvents the use of which would meet both technological and economic demands. Among proposed solvents, room temperature ionic liquids, supercritical and subcritical fluids and solvents from natural and renewable sources stand out as the most promising approaches for current solvent innovation. A brief overview of up‐to‐date knowledge regarding these solvents is presented herein, with special emphasis on their properties, applications and further perspectives as truly green industrial solvents. © 2015 Society of Chemical Industry 相似文献
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室温离子液体作为一类新型的环境友好的“绿色溶剂”,其物理和化学性质相对稳定.具有结构可调及可循环利用等特性,被称为绿色溶剂,已合成的离子液体己达百种以上。文章简述了室温离子液体的种类及离子液体的合成方法。 相似文献
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The dissolution of petroleum asphaltenes with ionic liquids is studied for the first time. The results show that the ionic liquids could be used as novel solvents for asphaltenes. The important parameters governing the ability of ionic liquids for dissolution of asphaltenes are discussed. It is found that, the ionic liquids based on the cations containing a conjugated aromatic core or the anions which are strong hydrogen bond acceptors are most effective, whereas the ionic liquids containing 'non coordinating' anions such as [BF4]^- and [PF6]^- are nonsolvents for asphaltenes. Increase in the effective anion charge density enhances the ability of ionic liquids to break the extensive asphaltene associations and thus enhances the solubility of asphaltenes in the ionic liquid. The dissolution ability of ionic liquid decreases apparently with increasing the substituted alkyl chain length of its cationic head ring. Temperature is found to play an important role on dissolution of asphaltenes, and the dissolution can be significantly imoroved bv microwave heatinz. 相似文献
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白尔铮 《精细与专用化学品》2005,13(10):1-5
介绍近期基础有机原料生产中的绿色化学工艺最新进展。其中主要包括基于新催化材料、超临界流体技术、新反应器技术、清洁原料路线以及再生资源利用等。而且,催化剂和催化作用将在其中起着关键作用。 相似文献
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Jinsheng Cheng Longhua Tang Jingying Xu 《Advanced Synthesis \u0026amp; Catalysis》2010,352(18):3275-3286
In this paper, an economical, green pathway involving the palladium nanoparticles (Pd NPs) catalyzed reductive Ullmann reaction of an aryl chloride to afford a biaryl with high conversion and selectivity in an ionic liquid (IL)/supercritical carbon dioxide (ScCO2) system was developed. The combination of IL and ScCO2 provides superior advantages in product separation, catalyst recycling and reuse of reaction media over traditional organic solvents. Further investigations showed that the Brønsted‐acidic imidazolium IL {e.g., (1‐butyl‐3‐(sulfobutyl)‐imidazolium) hydrogen sulfate, [bmim(HSO3C4)][HSO4]}, can replace the traditional active hydrogen donor readily with much enhanced product separation efficiency, the use of IL also led to an obvious improved stability of the Pd NPs, which was very helpful for catalyst recycling. Carbon dioxide, a naturally abundant, non‐flammable, relatively non‐toxic, economical and recyclable “greenhouse” gas, was found to significantly promote the selectivity of the Pd NPs‐catalyzed aluminium‐induced reductive Ullmann reaction of aryl chlorides. Investigations showed that the Pd NPs catalyst and IL can be recycled for at least five runs, indicating the economic viability of this process. 相似文献
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