查询词典 benzene

Mixed chlorotoluenes photo-chlorination experiments in a loop reactor were made, the effects of chlorine flow, temperature and p-/o- chlorotoluene initial ratio on mixed chlorotoluenes photo-chlorination were researched. The relations between the concentration of each component and time under different conditions were measured. The rule and the suitable process parameters of the photochlorination of p-chloromethyl benzene in the side chain were obtained.

本文在环流反应器中进行了邻、对氯甲苯混合光氯化反应试验，分别考察了不同氯气流量、不同氯化温度和不同对/邻氯甲苯初始配比对对、邻氯甲苯侧链光氯化反应的影响，实测了反应液中各组分浓度随时间的变化关系，得出了对、邻氯甲苯的侧链光氯化反应规律和适宜的工艺条件。

In the temperature rang from 120 to 150℃, the relations between the apparent reaction rate constant and temperature of the photochlorination in the side chain of m-chloromethyl benzene were: min-1 min-1 min-1 The apparent reaction activation energies are: Ea1=33.54、Ea2=32.45、Ea3=24.26kJ/mol.

在120～150℃温度范围内，间氯甲苯侧链光氯化表观反应速度常数与温度的关系为： min-1 min-1 min-1 表观反应活化能分别为：Ea1=33.54、Ea2=32.45、Ea3=24.26kJ/mol。

For product column T202 top, except that very small amount of benzoic acid and phthalide were contained, the rest was benzene anhydride, the column bottom was heavy component, which can meet the separation requirement.

产品塔T202塔顶除含有极少量苯甲酸、苯酞外，其余均为苯酐，塔底为重组分，满足分离要求。

The benzene fraction of the liquid-liquid partitioning was found to be the most active against the larvae of Plutella xylostella and Pieris rapae, with the rate of antifeeding, at ×50 dilution, of 97.7%and 97.3%, respectively, after 12 h exposure.

液—液分配法中，苯提取物的拒食活性最高，在50倍稀释浓度下，小菜蛾Plutella xylostella和菜粉蝶Pieris rapae幼虫对其拒食率分别为97.7%和97.3%。

Benzene homologues in air of workshops were preconcentrated with the activated charcoal sampling tube, and then desorbed with carbon disulfide.

用活性炭采样管富集车间空气中的苯系物，以二硫化碳为解吸剂，经毛细管柱GC MS选择离子法测定样品中苯系物，峰面积定

METHODS Chlorodehydromethyltestosterone was synthesized from methyltestosterone by cycloxidization with hydrogen peroxide to obtain cycloproxene methyltestosterone, which subjected to chloridization with was hydrochloric acid in the presence of propanone to obtain chloromethyltestosterone, and then was subjected to dehydrogenation with DDQ using PTS as dehydrogenation catalyst in benzene.

以甲睾酮和H2O2环氧化反应得到环氧甲睾酮，再与盐酸在丙酮溶媒中进行氯化反应，得到氯甲睾酮，最后用2，3-二氯－5，6-二氰基对苯醌在PTS催化下脱氢得到脱氢氯甲睾酮。

A range of oligoaryls having alternating para- or meta-benzene-furan rings is synthesized by rapid convergent/divergent method from the annlation of a propargylic dithioacetal and an aldehyde having a propargylic dithioacetal moiety as the substituent.

中文摘要结合分流法/汇集法，利用炔丙基硫缩酮单体和另一具有醛基的单体进行环化反应，可以迅速合成对位及间位取代苯环呋喃交错寡聚物。

The deactivation of catalyst in benzene alkylation with propene over Hβ zeolites under different conditions was investigated.

对不同条件下苯与丙烯烷基化反应Hβ催化剂的寿命、失活催化剂的积炭量和积炭性质进行了研究。

The loadings of propene are significantly larger than those of benzene at 100 kPa.

由分子筛内吸附质粒子云分布可知，在100 kPa时，丙烯在分子筛上的吸附量要远远大于苯的吸附量。

When benzene and propene adsorbed in zeolite at the same time, there are competitive adsorption, therefore the potential energy distribution could be changed significantly.

分子筛上存在着苯和丙烯的竞争吸附，并且吸附分子之间存在相互作用使两者与分子筛之间的相互作用能分布改变。

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。