查询词典 benzene

The results showed that new-type solid ferric potassium alum was a good catalyst for the synthesis of ethyl decanoate and the optimum conditions were as follows: molar ratio of acid to alcohol was 1:2, the use level of catalyst was 0.6g/0.05 mol capric acid, water-taking reagent benzene was 15 mL, reaction time was 2.5 h and the yield of ethyl decanoate could reach 98%.

结果表明，新型固体酸铁钾矾是合成葵酸乙酯的良好催化剂，在酸醇物质的量比为1：2，催化剂用量为0.69（0.05 mol癸酸），带水剂苯为15mL，反应时间为2.5h的条件下，癸酸乙酯的酯化率可达98%。

Through the experiment,it is known that the dissolving effect of benzene to Phenanthrene in some studied organic solvent is best, moreover DMF to Carbazole is best.

通过实验可知，在所考察的溶剂中苯对菲的溶解效果最好，太原理工大学硕士学位论文而DMF对咔哇的溶解效果最好。

Carbinol, ethylene, propylene, and benzene are called one of four basic organic chemical raw materials.

甲醇、乙烯、丙烯和苯被称为四大基本有机化工原料之一。

Based on the orthogonal experiment, the optimum synthetic conditions for dimethyl fumarate were as follows: the molar ratio of carbinol to fumaric acid was 6∶1, mass of the catalyst was 1.0%, the volume of the water removing reagent benzene was 10 mL, and the reaction time was 3 h.

催化合成富马酸二甲酯的最佳条件为： n∶ n=6∶1，催化剂用量为1.0%，带水剂苯用量为10 mL，反应时间为3 h，催化剂重复使用7次，酯化率大于90%。

With half-trace law instead of constant law,bromine ethane not iodine ethane reacts to carbolic acid sodium in order to make benzene ether.

以半微量法代替常量法，用溴乙烷代替碘乙烷与苯酚钠反应制取苯乙醚。

It hardly dissolves in water, glycol, and does not dissolve in ether, benzene and carbon tetrachloride.

难溶于水、乙二醇，不溶于乙醚、苯和四氯化碳等。

Carboxylic acid is widely found in nature, a large class of organic compounds to benzene containing one or more carboxyl for its features.

羧酸是广泛存在于自然界的一大类有机化合物，以含一个或多个羧苯为其特征。

Benzene used to be a common solvent in organic chemistry but is no longer used because it is a suspect carcinogen.

在有机化学中，苯曾经是常用的溶剂，但是由于它被怀疑是致癌物而不再使用。

The majority of that risk comes from benzene, a carcinogen that is released into the air by burning coal and oil.

风险的大部分来自苯，一种通过燃烧煤和石油释放到空气中的致癌物质。

As in the case of benzene-acetonitriles, chemisorption is probably the mechanism of the corrosion-inhibiting effects.

我们曾对苯乙腈类化合物的分子结构与缓蚀性能的关系作过一些探讨。

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。