查询词典 olefins

The carbonylation of olefins developed by Reppe is an important method to prepare a considerable nu...

烯烃的羰基化反应是合成一系列含氧有机精细化学品的重要方法。

The polymerization conditions influenced the activity and distribution ofα-olefins.

聚合条件对乙烯齐聚活性及α-烯烃分布的影响很大。

They may also be converted to ether s and olefins.

醇又能转化为醚和烯烃。

If the crackers have trouble next year, then there is some support,said a Korean olefins trader.

如果其裂解装置在明年出现困难，那么将会对乙烯价格产生其些影响。

Recent advances in heterogeneous catalyst s of ethylene oligomerization to α-olefins is summarized.

综述了国内外近几年乙烯齐聚制α-烯烃多相催化剂的研究进展。

Additionally, the C4 and heavier olefins may be hydrogenated.

另外可以使C4和更重的烯烃加氢。

The catalytic behavior of these complexes in the hydrosilylation ofα-olefins with triethoxysilane has been investigated systematically.

二、富勒烯过渡金属配合物的合成及其催化性能的研究以富勒烯为基的衍生物一般具有独特的催化性能。

Provide technical support and expertise relative to Olefins and Nitriles products to the Commercial Team and other departments as needed together with lab TS people.

与实验室技术服务人员共同为商务部和其他部门提供所需要的有关烯烃产品和腈类产品的技术支持和专业知识。

The kinetics model was gotten based on the alkyl mechanism, light olefins re-absorption and re-reaction. The kinetics experiment is carried out over the selected Fe-Mn-K catalyst, and the kinetics model parameters is got base on the kinetics experiment data. The parameters explain the reaction results that the carbon monoxide content is high, the methane content is the biggest of the hydrocarbon products and the olefin content is bigger than the corresponding alkenes content.

本文同时对该反应的反应机理和动力学进行了研究，以烷基机理为基础，建立了考虑烯烃再吸附和二次反应的动力学模型，并在选定的催化剂上进行了相应的动力学实验，结合动力学实验数据计算得到了相应的动力学模型参数，模型参数值解释了反应产物中CO的含量较高，以及烃类产物中CH4含量最高和烯烃含量大于相应的烷烃含量。

On the other hand, steam can be used to restrain the side reaction such as hydrogen transfer reaction so as to increase the yield of light olefins by diluting the concentration of the reactant. In addition, minor steam can react with the feed hydrocarbon resulting in the decrease of coke and the formation of active hydrogen without the increase of hydrogen gas and light saturates that is not desirable.

另一方面，水蒸气不仅仅具有降低烃分压的作用，抑制了氢转移反应等副反应，对于低碳烯烃的产率有好的影响，而且在反应过程中，少量参与了反应，与烃类发生了水煤气反应，生成了活泼氢，不仅降低了焦碳的产率，并且没有提高氢气、低碳烷烃等不希望得到的产物。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。