酸性反应

Polymerization was carried out between dimethyl adipate and triamine with the same mole ratio in the reactor. Acid dyeable additive can be obtained under the conditions of transesterification temperature 180~220℃, polycondensation temperature 240~270℃,pressure40~50Pa, The infrared analysis results showed that at the position of 1639cm^(-1), there was an obvious characterisitc peak of amide bond.

己二酸二甲酯与三胺按等量比在反应釜中进行聚合，在酯交换温度180~220℃，缩聚温度240~270℃，压力40~50Pa条件下即可获得酸性染料可染添加剂。

The promotion action of ionic liquid as an accelerant in synthesizing benzaldehyde ethanediol acetal and benzaldehyde propanediol acetal was studied.

摘要以离子液体为促进剂，强酸性聚苯乙烯732催化了苯甲醛与两种二元醉的缩醛反应。

For the stepwise mechanism, the ethylene molecule was firstly adsorbed at the Brnsted acid site via π-hydrogen bonding to form a stable complex, which then went through the protonation, leading to the formation of the ethoxide intermediate. Furthermore, the ethoxide reacted with the second ethylene molecule to form the butoxide product.

对于分步反应机理，乙烯分子首先通过π-氢键作用在酸性位形成稳定的吸附络合物，再进一步发生质子化并生成乙醇盐中间体，随后乙醇盐与第二个乙烯分子发生碳－碳键结合形成丁醇盐产物。

The results showed that the shape selective effect of the faujasite is obvious, and the thermodynamic balance exists between 2,6 DTBN and 2,7 DTBN.

结果表明，八面沸石对该反应过程有较好的择形催化作用，两种异构化产物(2 ，6 二叔丁基萘和 2 ，7 二叔丁基萘)之间存在着热力学平衡，即两种异构化产物可在酸性中心位上相互转化。

This technique has two prominent problems: titanium"s burning loss and high temperature melt treatment (up 1873K). The author puts forward melting protective cover used by plant ash which can insulate air and enhance effect of heat preservation effectively. At the same time, the author chooses alkalinous magnesite for furnace lining which can avoid redox reaction between silicon oxide (SiO2) and titanium, improve fireproofness of furnace lining and decrease titanium"s burning loss ratio.

针对制备工艺的两个突出问题：Ti元素的烧损问题和高温熔体处理问题(1873K以上)，提出利用草木灰作为熔炼的覆盖剂，能有效地隔离空气，强化保温效果，同时选用碱性镁砂炉衬，提高了炉衬的耐火度，克服了酸性炉衬中SiO_2与Ti元素的氧化还原反应，降低了Ti元素的烧损率。

Furfurylidene acetone obtained from acetone and furfuratdehyde by condensationwas used as a brightener in an acid-sodium chloride type Zn electroplating bath.

由丙酮和呋喃甲醛经缩合反应所制得的呋喃叉丙酮，用作酸性氯化钠型镀锌的光亮剂。

In this paper,the strong acid cation exchange resin has been studied as the catalyst for the esterification of gulonic acid .

选用强酸性阳离子交换树脂代替浓硫酸催化剂，对古龙酸的甲酯化反应进行了探索性研究。

Heteropoly compounds, with the properties of quasi-liquid and super acid, has been widely applied to ester reactions.

杂多化合物由于具有准液相和超强酸性的特征，广泛用于各种酯类反应。

In the reaction of e〓 with the two azo-dyes, hydrazyl type radicals are formed via electron addition followed by rapid protonation.

甲基橙和酸性橙7与水合电子反应形成的阴离子自由基都迅速质子化成偕腙肼自由基。

The kinetics of iridium catalyzed oxidation of isobutyl alcohol by cerium in aqueous sulphuric acid medium has been investigated by titrimetric technique in the temperature range of 25~40℃.

在酸性介质中用氧化还原滴定法研究了鈰离子在痕量铱离子催化作用下，於25~40℃区间氧化异丁醇的反应动力学。

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。