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氯乙酰氯的生产与应用 总被引:5,自引:0,他引:5
本文介绍了氯乙酰氯的性质、应用及其生产工艺。开发了以氯乙酸为原料,用氯气或三氯化磷进行氯化反应,再经萃取精馏分离,制得高纯度氯乙酰氯的实用技术。 相似文献
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《精细化工原料及中间体》2005,(4):48-48
氯乙酰氯是1种重要的有机合成中间体,主要用作强酰化剂、氯乙酰化剂和环酰化剂等,广泛用于氨基酸、农药、染料、助剂、萃取溶剂、制冷剂、灭火剂等领域,尤其在农药方面应用最广、用量最大。 相似文献
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有机磷萃取剂是工业萃取剂中最广泛使用的萃取剂门类,目前国内使用的有机磷萃取剂每年有数千吨,销售额数亿元,经济效益数千万元。我国磷化工行业目前还没有哪一个工厂已经生产磷系萃取剂,面对我国黄磷严重供过于求,为寻求黄磷深加工途径,本对有机磷萃取剂的合成与应用做一初步的介绍。 相似文献
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红外分光光度法测定水中油类的使用的传统萃取剂四氯化碳(CC14),属于氟氯烷烃类。破坏臭氧层,是国际公约《关于消耗臭氧层物质的蒙特利尔议定书》限制生产和禁止大量使用的化学物质将在2010年被禁用,开发新型萃取剂势在必行。日本已经成功研制出了CCl4的替代物.氯化四氟乙烯聚合物(S-316),但成本较高.美国则开发出了四氯乙烯,具有四氯化碳的大部分有点,且便宜,是很有前途的新型萃取剂。本文对此两种新型萃取剂进行了初步探讨. 相似文献
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考察了7-(2'-烷基-1'-烯基)-8-羟基喹啉萃取Ge(Ⅳ)的基本性能。结果表明,它是一种锗的优良新萃取剂。 相似文献
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宋代景德镇青白瓷具有"白如玉、明如镜、薄如纸、声如磬"的特点,而宋代的政治方针、哲学思想、宗教思想、文人审美和书画意趣等多方面的综合影响,正是形成宋代景德镇青白瓷审美风格的深层次原因。 相似文献
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教学相长既是教学理念,又是教学方法,它是古人对教学和认知的一种哲学思想。通过目前对教学相长认识现状的分析,结合课程教学,构建了课程教学中的教学相长模型。该模型包含5种形式的教学相长模式,囊括了目前人们对教学相长的所有认识。通过具体的教学实践,阐述了5种教学相长模式的具体应用,证明了这5种模式在课程教学中的有效性,为教学相长在新时期的应用提供了实践和理论依据。 相似文献
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室温离子液体(ionic liquids, ILs)作为一种新型的绿色环保溶剂,由于其特殊的功能化结构及热稳定性好、挥发度低和溶解能力强等特点,目前被广泛应用于纳米材料的制备领域。本文重点介绍了离子液体在纳米材料制备中的应用及相关研究的最新进展,结合一些示例对本领域进行了概述,其中包括离子液体作为溶剂,例如作为反应介质和稳定剂;模板剂,例如利用离子液体的微结构(胶束和囊泡、液晶凝胶、乳液和微乳液)作为纳米材料合成中的模板和软模板;反应物,例如作为反应中的还原剂和反应组分;以及离子液体微乳液在纳米材料制备中的特殊用法进行了总结,并讨论了离子液体在快速发展的纳米材料制备领域中的存在挑战和机遇。 相似文献
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Dr. Vimary Vázquez‐Dorbatt Juneyoung Lee En‐Wei Lin Prof. Heather D. Maynard 《Chembiochem : a European journal of chemical biology》2012,13(17):2478-2487
Natural saccharides are involved in numerous biological processes. It has been shown that these carbohydrates play a role in cell adhesion and proliferation, as well as protein stabilization, organization, and recognition. Certain carbohydrates also serve as receptors for viruses and bacteria. They are over expressed in diseases such as cancer. Hence, a lot of effort has been focused on mimicking these sugars. Polymers with pendent saccharide groups, also known as glycopolymers, are studied as oligo‐ and polysaccharide mimics. Controlled radical polymerization (CRP) techniques such as atom transfer radical polymerization (ATRP), reversible addition–fragmentation chain transfer (RAFT) polymerization, and nitroxide‐mediated polymerization (NMP), as well as cyanoxyl‐mediated free radical polymerization have allowed chemists to synthesize well‐defined glycopolymers that, in some cases, have particular end‐group functionalities. This review focuses on the synthesis of glycopolymers by these methods and the applications of glycopolymers as natural saccharide mimics. 相似文献
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《Journal of Adhesion Science and Technology》2013,27(11):1003-1023
Compression of soldered and conductive adhesive joints resulted in both reversible and irreversible changes in the contact electrical resistivity. At a low stress (as low as 0.02 and 0.005 MPa for soldered and adhesive joints, respectively), the resistivity increased with almost complete reversibility as the compressive stress increased. At an intermediate stress (as low as 0.03 MPa) for both soldered and adhesive joints, the resistivity decreased with partial or complete reversibility as the stress increased. At a high stress (as high as 0.21 MPa) for the soldered joint only, the resistivity increased slightly with increasing stress. The resistivity of the soldered joint at no load increased irreversibly and gradually as stress cycling progressed, even at the lowest stress amplitude of 0.12 MPa. However, the resistivity of the adhesive joint at no load decreased irreversibly and gradually as stress cycling progressed, even at the lowest stress amplitude of 0.009 MPa. 相似文献