查询词典 catalysts

With the complicated process catalytically, the investigation into reaction mechanism has been an important point of improving the all-round catalytic performance of catalysts.

由于其催化过程的复杂性，对催化剂反应机理的研究探讨向来是人们认识催化剂本质的有效途径。

In this work, we studied two types of catalysts, the neutral and cationic +BF4

在此研究工作里，我们探讨两种类型的催化剂，一为中性金属错合物

In this thesis, several novel reaction-controlled chiral phase-transfer catalysts were designed and synthesized from readily available materials, and were used in the asymmetric epoxidation of unfunctionalized olefins and chalcone.

本文以有机合成方法学为目标，从廉价的原料出发，合成出几个新的反应控制的手性相转移催化剂，并且检验了他们在催化烯烃的不对称环氧化中的催化效果。

The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92.1%。

Kinetics of photo-chlorination of acetic acid to form monochloroacetic acid ;2. The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92。

By comparing the dehydration methods of three catalytic esterification reactions and the catalysts used under negative pressure, the better method of synthesizing 2 ethylhexyl chloroacetate is using stannous oxide as catalyst under negative pressure.

通过对三种催化酯化反应的脱水方法及负压下使用不同催化剂的比较和选择，提出了以氧化亚锡为催化剂负压脱水合成氯乙酸2乙基己酯的方法。

Isooctyl chloroacetate was synthesized by chloroacetic acid and isooctyl alcohol with methyl benzenesufonat as catalysts under the irradiation of microwave.

在微波辐射下，以对甲苯磺酸为催化剂合成氯乙酸异辛酯。

After surface modification, Pt and Pd can be supported on the surface of CNTs. These novel catalysts were successfully used in the selective hydrogenation of cinnamaldehyde and halogenated aromatic nitro compounds.

经过表面修饰后，可以在纳米碳管表面均匀负载上Pt和Pd；分别把它们应用于肉桂醛和卤代硝基化合物的选择性加氢，取得较好的结果。

Co-B amorphous alloy catalysts supported on three kinds of mesoporous silica (common SiO2, MCM-41 and SBA-15) have been systematically studied focusing on the effect of pore structure on the catalytic properties in liquid-phase hydrogenation of cinnamaldehyde to cinnamyl alcohol.

系统研究了三种介孔硅(普通SiO2， MCM-41 and SBA-15)上负载的Co-B非晶态合金催化剂，重点考察孔结构对液相肉桂醛加氢制肉桂醇的催化性能影响。

It has been found that there exists a relationship between the coking rate and regeneration rate of the catalysts.

在再生过程中，催化剂本身对焦炭的燃烧速度基本没有影响，可以看作为惰性物。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。