芳烃

Combining the performance evaluation (activity, selectivity and stability) and the characterization of the catalysts (XRD, TPD, FTIR and the pore structure measure), it can be concluded that :(1)The activity of modified β is higher than MCM-22, but the selectivity of ethylbenzene is lower about 3% than that of MCM-22;(2)The mounts of diethylbenzene and the other by-products are higher 1.7 times and 1.5 times than these of MCM-22 respectively;(3)The catalytic performance of zeolite mixture is nearly equal to modified β, but the selectivity of ethylbenzene is higher about 0.5% than that of modified β;(4)The catalytic activity of zeolite is mainly correlated with the number of acid sites, strength and distribution, and the distribution of products is determined by the binding energy of ethylbenzene and the pore structure, while the stability of catalyst is affected by the amount of poly-ring aromatic alkylate and the pore structure.

以性能评价和特性表征（XRD、TPD、FTIR和孔结构测定）相结合的方式，对上述三种催化剂性能比较的结果表明：（1）改性的活性明显高于MCM-22，但乙苯选择性却低于MCM-22绝对差约3%；（2）改性(上二乙苯和其他副产物的生成量分别约为MCM-22上对应值的1.7和1.5倍左右；（3）混合型催化剂的性能与改性相仿，但乙苯选择性提高0.5%左右；（4）对乙苯合成，沸石催化剂的活性主要取决于其B酸中心数、酸强度及酸分布，产物分布则取决于催化剂表面的乙苯脱附能垒值和孔道结构，而稠环芳烃的生成量和催化剂孔道结构是影响催化剂稳定性的主要因素。

Dendritic p-t-butylcalix arene amide derivatives with terminal amino groups of the first and second generations were synthesized from the ammonolysis of ethyl calixylacetate with 1, 6-diaminohexane and Michael addition of methyl acrylate. Their structures were confirmed by IR, 1H NMR.

通过扩散法，采用氨基对丙烯酸甲酯的Michael加成反应和酯基的酰胺化反应交替进行，合成了4种树枝型对叔丁基杯芳烃酰胺衍生物(n=6，8)。

Aniline point is used to characterize pure hydrocarbons and to indicate the aromatic content of hydrocarbon mixtures.

苯胺点用来表现纯净的碳氢化合物的特性并用于显示烃类混合物里的芳烃含量。

In chapter 3, a method for simultaneous resolution and determination of three components ( pyrene, chrysene and anthracene) in complex coal tar system has been introduced.

论文的第三章，阐述了利用激发-发射荧光法对组分复杂的煤焦油实际样品中的三种多环芳烃：蒽、芘和的同时分辨和定量测定方法。

Polycyclic aromatic hydrocarbon in aerosols is one of the most harmful pollution to people's health.

大气气溶胶中的多环芳烃是对人体健康危害最大的环境污染物之一。

The results show that there are quite strong interactions between N,N-diethylformamide and aromatic hydrocarbon.

实验结果表明DEF分子与芳烃分子之间有相当强的相互作用。

The quality of lubricant base oil can be characterized by its aromatic hydrocarbon content.

为测量润滑油基础油中芳烃含量的多少，表征油品的精制深度和质量，研制了在线紫外分析仪。

This paper studies some clean process used for the nitration of aromatic hydrocarbon,including liquid phase reaction and gas phase reaction.

介绍了当前研究开发中的几种芳烃的清洁硝化工艺，包括液相硝化和气相硝化。

Aniline point is used to characterize pure hydrocarbons and toindicate the aromatic content of hydrocarbon mixtures.

苯胺点用来表现纯净的碳氢化合物的特性并用于显示烃类混合物里的芳烃含量。

"Diazo:Relating to or containing a pair of bonded nitrogen atoms, one of which is also bonded to an aromatic hydrocarbon."

"重氮的：关于或含有一对结合的氮原子的，其中一个还结合一个芳烃。"

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。