查询词典 acid reaction

The influence of acrylic acid and tetradecyl alcohol, amount of catalyst and inhibitor, reaction temperature, reaction time were investigated.

探讨了丙烯酸与十四醇摩尔比，催化剂和阻聚剂的用量、反应温度及反应时间对酯化反应的影响。

Firstly the mid-pruduct imidazoline was produced by reaction of naphthenic acid and diethylene triamine, then the corrosion inhibitor amphoteric imidazoline, which is soluble in water, was produced by reaction of imidazoline and sodium monochloroacetate in aqueous solution.

以高纯环烷酸与二乙烯三胺反应合成了中间体咪唑啉，再以去离子水为溶剂，用氯乙酸钠对该中间体进行两性化，制得了水溶性两性咪唑啉缓蚀剂。

Research in three aspects is studied in this thesis:(1) Through many experiments,the effects of mixed acid nitratiny reagent and its constitute and the proportion of reactant,as well as the reaction temperature and time ,on the nitrating reaction were studied.

本课题主要做了三个方面的研究：(1)硝化工艺采用硫酸硝酸组成的混酸硝化，通过实验来确定适宜的物料配比、混酸的组成、温度和反应时间以及分析这些因素对反应的影响。

Chapter V: A 1-D Zn coordinatin polymers is synthesized by the reaction of sodium azide, nicotinic acid and zinc chloride. A 3-D Ag supramolecular complex is synthesized by the reaction of sodium azide, 2-methylimidazole and silver chloride.

第五章：采用叠氮为基本构建单元，和烟酸共同桥联金属Zn得到一种一维链状配位聚合物；和2－甲基咪唑反应，得到一种银的三维超分子配合物。

In the second part, the cross-coupling reaction of organoboronic acid witharyl halide catalyzed by Pd has been studied, and the 〓 catalyzedcross-coupling reaction in organic phase and the 〓-TPPTS catalyzed reac-tion in water phase have been investigated also.

结果表明，无论是有机相催化反应还是水相催化反应，都得到了很高的转化率和产率。该反应条件温和，并且硼试剂和亲电底物上可以带各种官能团，适用范围极宽，是一个极有应用价值的反应。

The mechanism of the dilute acid catalytic hydrolysis reaction and reaction networks are discussed.

在此基础上对今后半纤维素稀酸水解反应的研究方向与水解产物的利用进行了展望。

The optimum conditions were as follows: the volume proportion of water and glacial acetic acid was 4, the reaction temperature was 30℃ and reaction time was 10 minutes.

由此对反应条件加以优化，得出反应的适宜条件是当水和冰醋酸的体积比为4，反应温度为30℃，反应时间为10 min时，收率可达78%。

The influence of water content,molar ratio of methanol to oil,concentration of alkaline catalyst,reaction temperature and time different reaction factors to transesterification ,and methods such as water washing,acid washing,extraction and pressure reduced etc.

考察了原料油水分含量、醇油物质的量比、催化剂浓度、反应温度、反应时间等对转酯化反应的影响，以及水洗、酸洗、萃取、减压蒸馏等不同后处理方法对产品品质的影响。

Room temperature ionic liquids are the hot points of the current research fields of chemistry, chemical engineering and functional materials. Since 1998, the preparation and application of ionic liquids as environmentally benign reaction media and functional material have been carried out in Lanzhou Institute of Chemical Physics. The detailed research work, including the design and preparation of novel ionic liquids, ionic liquid as catalyst and reaction medium in sulfuric acid free Beckmann rearrangement,...

离子液体介质与材料研究是当前化学化工、功能材料的热点领域之一。1998年底以来，我们以发展离子液体清洁反应介质和软功能材料为研究内容，以实现新离子液体的设计与合成，离子液体中无硫酸Beckmann重排反应、非光气异氰酸酯合成、二氧化碳吸收与活化、反应-升华分离一体化，微孔硅胶限制纳米尺度离子液体材料的设计合成和应用及离子液体-电化学技术集成等为目标开展了一系列研究工作并取得良好进展。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

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。