烯烃

The present invention is one kind of supported olefin polymerizing catalyst of metallocene and post-transition metal and its reaction process of catalyzing ethylene polymerization.

本发明是关于一种负载化茂金属和后过渡金属烯烃聚合催化剂及其制备方法，以及其催化乙烯聚合的反应工艺。

It was found that the load carrying capacity of Ni P brush plating layer was increased obviously and the wear rates of Ni P and Ni Cu P brush plating layers were decreased very much with the addition of sulfurized olefin in lubricating oil.

结果表明，在基础油液体石蜡中添加适量的硫化烯烃润滑时，Ni－P镀层的承载能力显著提高，Ni－P镀层和Ni－Cu－P镀层的磨损率都明显降低。

Indicate that using mixed olefin and sulfur with high-pressure to prepare the organic sulfurizing agent and using ex-situ presulfurization, is the important direction in presulfurization field.

提出采用高压法以混合烯烃和硫为原料制备有机硫化剂，进行器外预硫化，是今后预硫化领域发展的重要方向。

In this thesis, it is summarized that the current research on the thermodynamics analysis, the catalyst, the reaction mechanism, the kinetics of the carbon dioxide hydrogenation to light olefins.

本文对CO2加氢合成低碳烯烃反应体系热力学分析、催化剂开发、反应机理和动力学等方面的研究进行了综述。

It had already been used in preparing the immobilized catalyst for heterogeneous hydrogenation of olefins,[17] in desulfurization of simulated flue gas,[18] and particularly in the reactions between aldehydes or acetones and the compounds with active hydrogen, such as Henry reaction[19] and direct aldol reaction.

16它已被用于制备烯烃非均相加氢反应的固定相催化剂，[17]烟气脱硫，[18]并且特别地被用于醛或酮和含活泼氢的化合物之间的反应，例如Henry反应[19]和直接羟醛缩合。

So it is very necessary to study the characters and extend applications of this kind of alkenes with electron-donating substituents.

因此，深入研究具有供电子基团的活化烯烃的各种性质，扩展它们在各个领域的应用具有十分重要的意义。

Epoxidation of alkenes is one of the most important reactions in organic, synthesis.

烯烃环氧化在有机合成中占有十分重要的地位。

Light alkenes play a significant role in the petrochemical industry.

低碳烯烃在石化工业中起着举足轻重的作用。

In the first part, Co-containing zeolites and MCM-41 have been studied for the epoxidation of alkenes.

第一部分研究了位于分子筛中的Co~(2+)或高分散的single-site Co在烯烃环氧化反应中的催化性能。

This thesis includes two parts. The first part is study on hydroformylation of alkenes in ionic liquid-H2O system.

本论文分两部分：咪唑离子液体—水体系中的烯烃氢甲酰化反应研究和新型咪唑类手性季铵盐的合成。

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。