查询词典 benzene

And it is considered that the reduction-oxidation method would be the optimum method for realizing in industry direct hydroxylation of benzene to phenol.

通过比较认为，氧化还原法是未来实现苯直接羟化合成苯酚工业化的优选方法。

A series of Ni-based catalysts with different supports were prepared by impregnation method and tested in the hydroxylation of benzene to phenol.

本文利用浸渍法制备了一系列不同载体的镍基催化剂，并将其用于苯的羟基化反应。

The state of Cu species determine the catalytic performance in hydroxylation of benzene.

从XRD、UV-vis和H_2-TPR表征结果可见，催化剂制备中的焙烧温度、Cu的负载量和ZSM-5的硅铝比可以改变Cu物种与载体的相互作用强弱及Cu物种的分散状态，是影响催化剂苯羟基化反应性能的重要因素。

In this dissertation, we studied the catalysts, reaction conditions and mechanism of one-step hydroxylation of benzene to phenol oxidized by molecular oxygen, which is the cleanest and the most economical process.

所以近年来作为一条比较经济的路线，以苯为原料经过一步氧化，直接羟基化生产苯酚的反应吸引了各国研究者的广泛关注，这也是催化化学中最为艰难、最具有挑战性的研究课题之一。

And when using benzene as solvent, amorphous phosphorus nitride imide were obtained, which were consisted of microtubes, hollow balls, solid balls and square frameworks. Through adjusting reaction time and temperature, the morphology of the samples was well controlled.

进一步引入苯作为反应的溶剂，在高压反应釜中在190-250℃反应得到了由微管、空心球、实心球和四方框组成的非晶HPN〓，并通过调节反应时间和温度使产物的形貌得到了很好的控制。

So an optimum reboiler initial charge exists for a column when q0.7,which was checked and proved by experiments with toluene-ethyl benzene system.

本文采用甲苯-乙苯二元物系对分批精馏过程的最佳投料量进行了实验验证，实验结果与模拟结果吻合较好。

Properties White powder, inodorous, non-toxic, soluble in dilute alkali solution, carbon disulfide, benzene, acetone, dichloromethane and a little soluble in chloroform, insoluble in alcohol, carbon tetrachloride and ethyl acetate.

性质 白色粉末。无毒、无味。溶于稀碱、二硫化碳、苯、丙酮和二氯甲烷，微溶于氯仿，难溶于乙醇、四氯化碳、醋酸乙酯。

The results show that mesoporous and hollow SnO2 gas sensor has higher sensitivity and nice response-recovery characteristic to alcohol, hydrogen, but it has no sensitivity to carbon monoxide, isobutane, benzene and so on.

采用静态配气法对材料进行了气敏性能测试，结果表明：介孔和空心球氧化锡元件都对乙醇、H2表现出较高的灵敏度和良好的响应特性，而对CO、异丁烷、苯等不敏感。

Through study and analysis, heavy hydrocarbon was integratedly taken use of to lower down the consuming isopentane in this technology thus to reduce the production cost, in this way the benzene could be successfully stripped off to reach up to a value within the safe limit.

经过研究分析，将重烃综合利用，使异戊烷消耗量和成本大大降低，且同样能达到将苯含量降到安全限度内的目的。

The chemical speciation of VOCs in indoor air was similar to the outdoor, and the dominant species were isopentane, benzene, toluene, propanal, propene and dichloromethane.

结果表明，室内总VOCs浓度高于室外，烷烃是含量最丰富物种，平均占室内外空气中定量VOCs总浓度的32.8%。

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。