查询词典 nitrobenzene

The results showed that the wastewaters from the production of dyestuff, rubber and assistants from individual discharging points had significant effects on nitrification,while some characteristic pollutants,sueh as aminobenzene,nitrobenzene,phenol as weU as Zn2+,Mn2+,and Ni2+,especially Ni2+,had obvious inhibiting effects on nitrification,resulting in obvious reduction of the rate of nitrificatiOn in the biochemical treatment system.

研究结果表明：来源于个别排放点的染料生产污水、橡胶生产污水、助剂生产污水对硝化作用有显著的影响，一些特征污染物如苯胺，硝基苯，苯酚及Zn2+，Mn2+，Ni2+均对硝化作用有明显的抑制作用，从而导致生化处理系统的硝化反应速率明显降低，而且以Ni2+最为显著。

Synthesis of p aminophenol from nitrobenzene by hydrogenation over Pt/γ Al 2O 3 catalyst was studied, and the appropriate process conditions were obtained.

以 Pt/γ-Al2 O3 为催化剂研究了硝基苯催化氢化法制对氨基苯酚的反应，得到了适宜的工艺条件。

The new research progress in synthesis of p aminophenol by chemical reduction,catalytic hydrogenation,electrochemical reduction and carbonic oxide reduction from nitrobenzene was reviewed.

评述了硝基苯化学还原法、催化加氢法、电化学还原法和一氧化碳还原法等合成对氨基苯酚的最新研究进展，认为对硝基苯还原法新技术的深入研究有利于医药和染料等行业的进一步发展，具有很好的社会和经济效益。

Bifluoro nitrobenzene was the raw material of synthesis of asymmetry chromotropic acid bisazo fluoroarsen reagent, By way of ammonia substitution, arsonation, reduction and coupled reactions, bisazo fluoroarsen was synthesized.

以2，4—二氟硝基苯为起始原料，经过氨取代、胂酸化、还原、偶联反应合成了偶氮氟胂Ⅰ，然后分别选择不同的取代苯胺与偶氮氟胂Ⅰ偶联，合成了一系列的不对称变色酸偶氮氟胂。

The value of current density and the apparent active energy of electroreduction of substituted nitrobenzene depend on the electronic effect of substituted group and space resistance. o,m,p-chloronitrobenzene will be electroreduced to azoxy compounds by taking three electrons, o,m-nitrotoulene and o,m-nitrobenzoic acid will be reduced to phenol compounds by taking four electrons, and p-nitrotoulene will be reduced to the aniline by taking six electrons. According to these results, the electroreduction mechanism of the substituted aryl nitro-compounds was studied in detail.

在电还原过程中，还原峰电流和表观活化能的大小均与取代基的电子效应和空间位阻相关，同时取代硝基氯苯得3个电子将还原生成氧化偶氮苯类化合物：邻、间硝基甲苯、硝基苯甲酸得4个电子将还原生成酚类化合物；对硝基甲苯得6个电子将还原生成胺类化合物，在此基础上，探讨了各芳族硝基化合物的电还原机理。

The recent advances in the main clean processes to synthesize diphenylmethane diisocyanates are reviewed, such as BTC method, condensation of aniline, reductive carbonylation of nitrobenzene, oxidative carbonylation of aniline, methoxycarbonylation of aniline, alcoholysis of N,N'-diphenyl urea and the coupling process.

回顾了清洁合成二苯甲烷二异氰酸酯的几种主要方法，如BTC法、苯胺缩和法、硝基苯还原羰基化法、苯胺氧化羰基化法、碳酸酯法、二苯基脲法和反应耦合法等合成路线。

The electroreduction of nitrobenzene in room temperature ionic liquid——EMimBF4 on Pt electrode was investigated.

采用循环伏安法和恒电位电解法研究了离子液体EMimBF4中硝基苯在微铂电极上的选择性电还原特性。

The electroreduction of nitrobenzene in room temperature ionic liquidEMimBF4 on Pt electrode was investigated.

采用循环伏安法和恒电位电解法研究了离子液体EMimBF4中硝基苯在微铂电极上的选择性电还原特性。

This dissertation studied the electrode process of direct electroreduction nitrobenzene to /j-aminophenol on different electrodes in sulfuric acid systems. The synthetic technology has also been discussed in this dissertation.

本文以硝基苯为原料，在硫酸体系中，研究了不同电极材料上直接电还原合成对氨基苯酚的电极过程，并对其合成工艺进行了探讨。

Results indicated that the WC/TiO2 nanocomposites exhibited higher activity and better stability for the electroreduction of nitrobenzene than mesoporous WC and WC nanoparticles.

结果表明， WC/TiO2纳米复合材料对硝基苯的电催化活性和电化学稳定性均优于介孔结构碳化钨和纳米WC颗粒。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。