查询词典 nitration

However, a constant flow system can enhance ammonia levels in the water, allowing for better nitration and higher growth rates.

不过，源源不断系统能提高在水中的氨的水平，以更好地硝化和较高的增长率允许。

In this paper,3-methoxy-5,6-diamino-2-nitropyridine was synthesized from 3,5-dichloropyridine by substitution,oxidation,nitration and ammoniation .

研究了以3-氯-5-甲氧基-2，6-二硝基吡啶为原料，通过甲氧化、硝化、氨化合成3-甲氧基-5，6-二氨基-2-硝基吡啶，该化合物的结构通过IR，1H NMR，MS和元素分析进行了表征，确认为目标化合物。

The applied level of operation technology in units like sulfonation, nitration, hydrogenation, polymerization, ammonolysis and separation etc.

十一五的发展战略是充分发挥自身优势，加大投入力度，合理构造产业链，重点发展基础化工、精细化工、农用化工。

Methods Starting from anisole, liarozole was synthesized by Friedel-Crafts acylation, nitration, nucleophilic substitution, reduction and cyclization.

以苯甲醚为起始原料，经傅克酰基化、硝化、取代、还原、环合等7步反应得到目标化合物利阿唑。

This paper studies some clean process used for the nitration of aromatic hydrocarbon,including liquid phase reaction and gas phase reaction.

介绍了当前研究开发中的几种芳烃的清洁硝化工艺，包括液相硝化和气相硝化。

In the present paper, regiospecific aryl nitration and consequent derivation of meso-tetraarylporphyrins were studied.

本论文对meso-四芳基卟啉芳环的定位硝化反应及其衍生物的合成进行了研究。

65 The methyl group on the benzene ring greatly facilitates the nitration of toluene.

苯环上的甲基使甲苯非常易于硝化苯环上的甲基使甲苯非常易于硝化。

Cellulose nitrate was obtained via nitration of cellulose using the mixture of sulfuric acid and nitric acid.

利用粘度法测定了制备的硝酸纤维素的分子量为1.3×10~5 g·mol~(-1)。

Firstly, micro-thermal calorimeters were used to qualitatively analyze the thermochemistry behaviour of reactants system under adiabatic mode; Subsequently a series of toluene nitration experiments were carried out in an isothermal reaction calorimeter to study the influences of different operating conditions such as stirring speed feeding rate and setting temperature and so on . The thermal hazard assessment of toluene nitration was derived from the measured calorimetric data, the rate of the reaction the adiabatic temperature increase △T_ad and maximal temperature attainable MTSR_max in a runaway situation can also been derived.

首先采用微量热分析仪对反应体系在绝热状态下的热行为进行分析；再采用等温条件下的反应量热器实验研究不同的工艺条件如搅拌速度、加料速度和设定温度等参数对反应结果的影响；结合热分析数据和RCle数据，对甲苯的一段硝化过程进行了初步的热危险分析，推导出反应速率方程、反应失控条件下的绝热温升△T_和反应所能达到的最大温度MTSR等参数。

Here, Risk Assessment Code matrix method and runaway scenario analysis method were used to evaluate the thermal runaway criticality, and some reaction conditions were compared and analyzed as well. At last, based on the experimental results, the theoretical calculation was adopted to analyze the decomposition of nitration product and the electrophilic substitution mechanism of these nitration reactions. All these work are of important value for the correct evaluation of thermal risk and the decrease of chemical reaction runaway accidents.

本文采用风险矩阵法和失控情景分析方法评估此反应的热失控危险，对反应中的一些影响因素展开比较和分析，并结合实验结果，从理论角度进一步分析了各硝化产物分解的难易性和硝化反应亲电取代的硝化机理，这些工作对准确评估反应的热危险，减少反应失控事故具有重要的参考价值。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。