甲苯

In this paper,the pollution sources and the hazards of the pollutants in nitrotoluene production are briefly described,the various approaches for reducing and eliminating the pollution by adoption of cleaner production are outlined.

文摘：简介一硝基甲苯生产过程中污染物的产生和危害，概述了采用清洁生产技术减少和消除污染的各种途径。

The reaction conditions for synthesizing methylhydroquinone using p nitrotoluene and conc.H\-2SO\-4 in the presence of catalyst were studied experimentally with the uniform design method,and the major influencing factors were researched.

用均匀设计法实验研究了对硝基甲苯与浓硫酸在催化剂作用下合成甲基对苯二酚的反应条件，考察了各种影响因素。

How can we solve this problem? First, we must find a way to let the oxygen activated; secondly, let the H atom cleavage from the methyl, and turn to carbanions; finally, the activated dioxygen react with carbanions, so the problem of oxidizate nitrotoluene is sloved in the end.

因此，在较温和的条件下高选择性氧化硝基甲苯制备硝基苯甲酸是一个具有重要理论意义和实用价值的研究课题。

Isopentanol, nitrochlorobenzene, nitrotoluene and diethylbenzene were well separated in the range of optimal carrier gas velocity of 13~17cm/s.

SE-30系列毛细管色谱柱的最佳载气线这范因为13~17cm/s，且在最佳线速度下很好地分离了异戊醇、硝基氯苯、硝基甲苯及二乙苯同分异构体体系。

The results indicate that the imprinted polymers synthesized by methacrylic acid as functional monomer exhibite the best regioselectivity, yielding up to 49.6% pare and 44.1% ortho isomer of nitrotoluene.

结果显示分子印迹聚合物提高了甲苯的对位选择性硝化能力，并且以甲基丙烯酸为功能单体的分子印迹聚合物的对位选择性最好，邻对比为0.89。

M-Nitrobenzoic acid was preparated from m - nitrotoluene by liquid - phase oxidation with simulated air .

间硝基甲苯经液相模拟空气氧化制得间硝基苯甲酸。

The aromatic position isomers, such as xylene and nitrotoluene, were separated well. Moreover, some chiral compounds including alcohol, amine, ester etc., were also resolved.

不但对二甲笨、硝甲苯等难分离的芳香族位置异构体，而且对醇、胺、酯等多种类型的手性异构体均有很好的分离能力和手性选择能力。

The same methods were used to study toluene dinitration, and the results indicated that the thermal runaway risks of these reactions were low too; prolonging dosing duration was helpful to the conversion of all nitrotoluene; decreasing the molar ratio of nitric acid to mononitrotoluene would make an insufficient conversion; among the given temperatures, rising reaction temperature couldn\'t markedly change the yield coefficient, but lead more heat generation and higher thermal runaway risk.

采用同样的方法对二段硝化反应进行研究，结果表明：二段硝化反应的热失控危险性也较低；延长加料时间，有利于反应完全；而随着硝酸与一硝基甲苯摩尔比的减小，硝化难以进行完全；在选定温度范围内升高温度，产物得率无显著变化，反而易导致放热加剧，增加体系的热失控危险。

Catalytic oxidation ; p nitrotoluene ; p nitrobenzoic acid ; Co 2

催化氧化；对硝基甲苯；对硝基苯甲酸；乙酰丙酮钴

Moreover, according to supply and demand at home and abroad, and market price changes, and so on, will also be on the next year, oil, o-dichlorobenzene, nitrotoluene, oriented silicon steel sheet, seamless stainless steel tubes, marine boiler gearshafts, heat-sensitive business card printing, contact image sensor, wind power equipment and other products are no longer implemented a lower rate of tax on imported tentative recovery rates, and increase the fuel oils, distillation of sulfuric acid, sulphor, autoconer, fccl copper foil products imported to the tentative tax rate.

此外，根据国内外供需状况和市场价格变化等情况，明年还将对磷酸、成品油、邻二氯苯、硝基甲苯、取向性硅电钢宽板、不锈钢制无缝锅炉管、船舶用传动轴、热敏制卡头、接触式图像传感器、风力发电设备等产品不再实施较低的进口暂定税率，恢复最惠国税率，并适当提高了燃料油、升华硫磺、硫酸、自动络筒机、覆铜板用铜箔等产品的进口暂定税率。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。