烯烃

In order to produce n-pentane desorbing agent for molecular sieve dewaxing unit,the refining tests for reformed n-pentane oil were carried out by using complexing agents.

为了生产用于分子筛脱蜡装置的正戊烷脱附剂，利用络合化学试剂对切割分离后的重整正戊烷油进行了脱烯烃精制实验。

Alkylation of C6D6 with 1-dodecene using Br-ALCl3 as a catalyst was firstly carried out. Molecular structures of products, dodecylbenzene isomers, were analyzed by GC-MS and NMR, and the deuterated atom in the dodecylbenzenes was verified to be connected with 1-carbon of the side chain.

首先进行了Br-AlCl3催化氘代苯与1-十二烯烃的反应，通过GC-MS及NMR分析产物十二烷基苯同分异构体的结构，验证了氘原子与产物侧链1-位碳相连的结论。

The polymerization of conjugated dienes on a cationic exchange resin was investigated.

在一连续的固定床反应器中，采用强酸性阳离子交换树脂催化剂，研究了共轭二烯烃在醚化条件下的反应行为。

Compounds containing two double bonds are called dienes.

包含两个双键的化合物叫做二烯烃。

It is identified that the peak at -2.45V is styrene or naphthalene, and the peak at -2.80V is conjugated dienes.

分析表明-2.45V处的峰来自苯乙烯或萘，-2.80V处为共轭二烯烃的特征峰。

Catalytic cracking ; gasoline stock ; dienes ; selective hydrogenation ; nickel ; catalyst ; potassium ; cocatalyst

催化裂化；汽油料；二烯烃；选择加氢；镍；催化剂；钾；助催化剂

The Chemical method is based on the Diels-Alder reaction of conjugated dienes with maleic anhydride and the chromatographic analysis use a packed column with SE-30 as stationary phase.

建立了用共轭二烯烃与马来酸酐Diels-Alder特性反应和非极性固定液SE-30填充柱1m×1。

Titanium oxide; aluminium oxide; selective hydrogenation; dienes

TiO ，载体，加氢反应，制备，条件氧化钛；氧化铝；选择加氢；二烯烃

Epoxidation of olefins is the most important reactions in organic synthesis to approach epoxides.

合成环氧化物的重要途径是烯烃的环氧化反应。

Epoxidation of olefins is one of the most important reactions in organic synthesis,because the epoxides can be easily converted to large variety of compounds.

烯烃环氧化反应是一类重要的有机反应类型，因为环氧化物是有机合成中重要的中间体。

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。