查询词典 aromatization

Using mordern physical chemistry techniques (such as XRD、 TG-DTA、 IR、 XPS and 〓Xe-NMR)、 chemical adsorption techniques (NH〓-TPD、 H〓-TPD、 TPO、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本论文运用各种近代物理表征方法(XRD、BET、TG-DTA、IR、XPS和〓Xe-NMR)、化学吸附技术(NH〓-TPD、H〓-TPD、TPO、TPR等)和正己烷、甲基环戊烷及含噻吩正己烷的脉冲微反等方法，着重研究了(1)载Pt的β和L沸石在分解预处理过程中发生的变化；(2)沸石载体结构及酸碱性对Pt粒子分散及电子状态的影响；(3)第二金属组份对载Pt沸石催化剂上正己烷芳构化及抗硫性能的影响等，得到了某些有意义的结果。

A mechanism involved in the second [5 + 1] annulation step, includinga formal [5 + 1] annulation and accompanied chlorovinylation, chloroformylation,amination and aromatization reactions, is proposed.

并对第二步反应机理进行了推测，其中包括了一个一般的[5 + 1]加成反应及伴随此加成反应而发生的氯化乙烯化，氯化甲酰化，氨化和芳构化反应。

Generally speaking, the reaction types involvingα-oxoketene--acetals mainly include the regioselective addition-aromatization with organometallic reagents, conjugate addition-cyclization with nitrogen nucleophilicspecies, nucleophilic reactions ofα-carbon, acting as odorless dithiol equivalentsin thioacetalization, Michael additions and [5+1] annulation, as well as the synthetic applications based on the above reactions.

一般来说，基于α-羰基二硫缩烯酮化学的反应主要为：与金属有机试剂的选择性加成反应，与氮亲核体的共轭加成反应，α-碳原子的亲核性及相关反应，烷硫基作为硫醇的替代试剂的应用，α-羰基二硫缩烯酮在碳环、杂环化合物合成中的应用等。

Compared with traditional way,catalytic aromatization of isophorone has been proved to have many advantages.

与传统工艺相比，异佛尔酮的催化芳构化制备3，5-二甲基苯酚方法具有很多优点。

Furthermore, two synthesising routes are compared and the research of catalytic aromatization of isophorone is summarized in this paper.

本文对两种工艺路线进行了比较，论述了异佛尔酮催化芳构化的研究进展。

We propose a nucleophilic addition/insertion mechanism for this nucleophilic aromatization on the basis of a series of experiments.

我们提出了亲核加成/插入机制这个亲核芳构化的基础上，通过一系列试验。

The catalytic activities of both zeolites on the aromatization of hexane are determined.

最后对两种样品的催化已烷芳构化的活性进行了测定。

The experimental results showed that reaction temperature and space velocity had remarkable influence on aromatization of light hydrocarbons.

考察了反应温度、空速和高径比条件对轻烃在分子筛催化剂上低温芳构化制取高辛烷值汽油性能的影响。

It was also revealed that strong acid sites were the center of methane aromatization.

随着Mo担载量的增加，Mo／ZSM-5分子筛的比表面和总酸量均下降。

Methane non-oxidative aromatization is very significant to utilization of resources and science of catalysis.

甲烷无氧芳构化反应对能源利用和催化科学均具有重要意义。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。