查询词典 catalyst

The effects of the ratio of reactants, quantity of catalyst, reaction time, reaction temperature and entraining agent of water on the product yield were investigated and the reuse of catalyst was studied. The product was confirmed by GC and IR.

探讨了酸醇物质的量比、催化剂用量、反应时间、反应温度、带水剂等对反应的影响，并对催化剂进行了重复利用研究，产品经气相色谱和红外光谱分析。

Heterogeneous Salen-Mn catalyst was prepared by chemical linkage and sol-gel entrapping method. The catalyst and its precursor were characterized by means of FT-IR, UV-vis and 1H NMR.

采用化学键联和溶胶－凝胶相结合的方法制备锚链固定的多相化Salen-Mn催化剂，利用FT-IR，UV-vis，1H NMR等方法对催化剂及其前体进行表征。

In an embodiment, disclosed is a catalyst for selectively hydrogenating a highly unsaturated hydrocarbon to an unsaturated hydrocarbon comprising a chlorided inorganic catalyst support, palladium, and silver.

在实施方案中，公开了用于将高度不饱和烃选择性加氢成不饱和烃的催化剂，其包含氯化的无机催化剂载体、钯和银。

The exploratory study on the application of MSB reactor with fine particles of Ni based amorphous alloy as catalyst in the process of purification of caprolactam indicated that the hydrogenating efficiency of MSB reactor process was increased 3-5 times, the catalyst consumption was reduced by 50%, and the reactor volume could be reduced, as comp...

以细颗粒镍系非晶态合金为催化剂的磁稳定床反应器用于己内酰胺加氢精制的试验研究表明，与现有釜式工艺相比，加氢效率可提高 3～ 5倍，催化剂耗量降低 50 %，并且可缩小反应器体积。

In this paper, the method of growing carbon nanotubes bycatalytic decomposition of 〓 in low temperature on apowder Ni-Mg-O catalyst system is used. By controlling thereaction conditions and catalyst precursor, we preparedifferent configuration of carbon nanotubes and discuss themechanism of carbon nanotubes growth, we firstly researchthe character of lithium ion intercalating carbon nantubes,and reach some important conclusions.

本文主要采用了甲烷在镍基催化剂上的低温裂解，控制不同的条件和催化剂前驱体，制备出各种不同形态参数的碳纳米管，讨论了碳纳米管的生长机理；并且首次研究了各种不同形态参数的碳纳米管的嵌锂性能，取得了一些有意义的结论：一。

Traditional method is the fundamental method of V - P - O catalyst preparation; Aerosol Precessing is a method of fast catalyst preparation; Flame Deposition Technique is one of method of preparing nanostructured Vanadium phosphorus Oxide.

但不同的制备方法对催化剂晶粒大小、晶型、比表面和耐磨程度影响较大。在v—P～O催化剂的研制过程中，人们对V—P—O催化剂的不同制备方法也进行了研究，以期合成反应性能更好的催化剂。

The XPS results show that the amount of low valence molybdenum and S(superscript 2-) increases with increase of the content of K in sulfured catalyst, and(superscript 2-) is suppressed. It is found that keeping the ratio Mo(superscript 4++Mo(superscript 5+)/Mo(superscript 6+) at 0.8~1 level and remaining more S(superscript 2-) species on the catalyst are in favor of the improvement of the catalytic activity at low temperature.

XPS表征显示，硫化态催化剂随着钾添加量的增加，低价态钼和S(上标 2-)增加，(上标 2-)受抑制，Mo(上标 4++Mo(上标 5+)/Mo(上标 6+)质量比为0.8~1和较多的S(上标 2-)物种有利于提高催化剂的低温活性。

According to the invention, on the basis of regular wet process thiolaction, it adopts reformed generating oil as the sulfurized oil so as to avoid the extra high temperature in the early starting time, decrease the carbon deposition of the catalyst and increase the stability and activity of the catalyst.

按照本发明，在常规湿法硫化过程的基础上，选用重整生成油作为硫化油，可以避免开工初期温升过高，降低催化剂积炭量，使催化剂的活性稳定性明显提高。

Appropriate amount of Ni and Co promoters was favourable to the thiophene HDS activities of the supported WP catalysts.The supported WP catalyst showed a higher thiophene HDS activity than that of the sulfurized industrial catalyst at higher reaction temperature.

适量的助剂Ni 和Co有利于负载型磷化钨催化剂噻吩加氢脱硫活性的提高，其噻吩加氢脱硫高温活性优于硫化态工业催化剂。

A set of high pressure esterification reaction apparatus has been designed and established. By comparison of ten kinds of esterification catalyst, ammonium molybdate and sodium tungstate were chosen as properly catalyst of this reaction.

自行设计、安装了一套高压酯化反应装置，经比较、筛选十种酯化反应催化剂，确定钼酸铵、钨酸钠为该反应适宜的催化剂。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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