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solid-base
相关语句
  固体碱
     Application of solid-base catalyst in the transesterification of lipid
     固体碱催化剂在油脂酯交换反应中应用
短句来源
     STUDY ON PREPARATION OF BIODIESEL CATALYZED BY LOADED SOLID -BASE
     负载型固体碱催化制备生物柴油研究
     SYNTHESIS OF PSEUDO-IONONE WITH SOLID-BASE CATALYSTS
     固体碱催化合成假性紫罗兰酮
短句来源
     Various solid-base catalysts were used in the condensation of citral with acetone,and the reactive activity and selectivity were well examined. Using barium hydroxide or basic ion exchanger,the yield of the reaction was up to 95%.
     系统地研究了各种固体碱催化剂催化柠檬醛与丙酮缩合制备假性紫罗兰酮的反应活性及选择性,用氢氧化钡或大孔强碱性阴离子交换树脂催化,产品收率高达95%。
短句来源
     In this paper,the properties of magnetic catalysts,especially nano-sized magnetic catalysts,are illustrated and the appli- cation of magnetic catalysts in solid-acid catalysis,solid-base catalysis,phase-transfer catalysis,photocatalysis and bio- catalysis is reviewed.
     介绍了磁性催化剂,特别是纳米磁性催化剂的特性,并综述了近年来磁性催化剂在固体酸催化、固体碱催化、相转移催化、光催化、生物催化等领域的应用研究进展。
短句来源
  相似匹配句对
     Solid Lasers
     固体激光器
短句来源
     On Solid Biomechanics
     关于生物固体力学
短句来源
     Liquid-Solid Extraction
     液—固萃取
短句来源
     T-Stress in Piezoelectric Solid
     压电体中T应力项
短句来源
     Progress in Catalysts for Solid Base
     固体碱催化剂研究进展
短句来源
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  solid-base
Solid-base catalysts also catalyzed a reaction of trimethylacetylene with amines to form aminosilanes.
      
Solid-base catalysts, such as KF loaded on alumina, selectively gave alkoxysilanes through the reaction of alkylsilanes not only with alcohols but also with aldehydes or ketones at around 300-340 K.
      
Synthesis of Alkoxy- and Aminosilanes over Solid-Base Catalysts
      
Deoligomerization of Cyclooligosiloxanes with Dimethyl Carbonate Over Solid-Base Catalysts
      
Condensations of various primary alcohols (C2-C5) with methanol were carried out at atmospheric pressure over various metal oxides having a solid-base property.
      
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Since the latter half ofthe 1970s,changes that have taken place in the world economic balance are in favour ofthe United States.By taking advantage of these changes,the United States has beentrying to rebuild its world hegemonic position.It has become over-confident and toug-her in its foreign policy.However,the U.S.attempts at rebuilding its hegemonicpower are unrealistic.This is because,for one thing,there is no solid base for itsrelative economic recovery and,for another,the entire world situation is by no...

Since the latter half ofthe 1970s,changes that have taken place in the world economic balance are in favour ofthe United States.By taking advantage of these changes,the United States has beentrying to rebuild its world hegemonic position.It has become over-confident and toug-her in its foreign policy.However,the U.S.attempts at rebuilding its hegemonicpower are unrealistic.This is because,for one thing,there is no solid base for itsrelative economic recovery and,for another,the entire world situation is by no meansin its favour.

自七十年代后半期以来.在国际经济力量对比中,巳发生某些有利于美国的新变化。美国力图利用这一变化来重振其世界霸权地位。它的对外政策已变得更加自信、更加逼人了。但由于其经济实力相对恢复的基础并不稳固,整个世界形势对它并不有利,所以,它重振霸权的打算是不现实的。

X-ray photoelectron spectroscopy(XPS) and other surface analytical techniques were used to study the surface characteristics for three kinds of hydrated calcium silicates of different crystallinities. The experimental results show that the surface characteristics are correlated with crystallinity of hydrated calcium silicate. The poorer the crystallinity, the greater the C/S ratio; the greater the electron binding energy value determined by XPS, the larger the quantity of solid base on the surface. At the same...

X-ray photoelectron spectroscopy(XPS) and other surface analytical techniques were used to study the surface characteristics for three kinds of hydrated calcium silicates of different crystallinities. The experimental results show that the surface characteristics are correlated with crystallinity of hydrated calcium silicate. The poorer the crystallinity, the greater the C/S ratio; the greater the electron binding energy value determined by XPS, the larger the quantity of solid base on the surface. At the same time, the corresponding point of zero charge(PZC) of ζ-potential appears in a more concentrated basic solution.

本文运用X光电子能谱法(XPS法)及其它表面分析方法,对三种结晶程度不同的水化硅酸钙的表面特性进行了研究。结果表明,水化硅酸钙的表面恃性与结晶程度有一定的相关性。结晶程度越差,用XPS法测得的C/S比和电子结合能越大,颗粒表面的固体碱量也增加,同时相应的ζ电位的零电点出现在浓度较高的碱性溶液中。

The synthesis of dialkyl ethers of diethylene glycols from DEG and dialkyl sulfate or alkyl halide in the presence of solid base was studied. The effects of base, temperature, reaction time, materials ratio, etc. were discussed. Pure diethyl and dibutyl ethers were obtained in high yields.

本文描述了二甘醇双烷基醚的合成。作者以二甘醇和硫酸二烷基酯或卤代烃为原料,在固碱作用下,发生Williamson反应;并研究了固碱的作用,反应温度、反应时间及原料配比对反应的影响,从而高产率地获得了纯二甘醇双乙醚和双丁醚。

 
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