异丁烯

Compared with TEA,TiBA activated system produced more blocky copolymer,but the blockiness of its block fraction is lower.

与三乙基铝相比，三异丁基铝为助催化剂得到的不溶级份含量及丙烯含量都较高，但其嵌段性却较低。

ABSTRACT In this dissertation, the alkylation process of isobutane with butene over β zeolite were studied, which includes the characteris...

本文主要研究了不同方法改性的β沸石催化剂在超临界条件下异丁烷和丁烯的烷基化反应规律，并与气相、液相条件下的反应结果进行了比较。

The basic principles of membrane separation technology for recovering butene and iso-pentane from VOC/ N2 are described, and the influence of operating condition on membrane separation is indicated.

介绍了有机蒸气膜分离的技术进展，阐述了应用膜分离技术从有机蒸气/氮气混和气中分离回收丁烯和异戊烷的基本原理，指出了操作条件对膜回收效果的影响。

The effects of reaction temperature WHSV and addition of water vapor on skeletal isomerization of butene over SAPO-11 catalyst were investigated in a fixed-bed down-flow reactor.

在连续流动固定床反应装置上，考察了温度、空速及添加水蒸汽对混合丁烯在SAPO-11分子筛催化剂上骨架异构化的影响。

Study on Alkylation of Isobutane with Butene over WO3/ZrO2 Strong Solid Acid Ⅱ.

篇名 WO3/ZrO2固体强酸催化剂上异丁烷／丁烯的烷基化反应Ⅱ。

The relationship between acid amount of the catalysts and activity of the isomerization of1- betene was linear.

催化剂的酸度与丁烯-1异构化活性呈线性关系。

The main source of benzene in the presence of a catalyst oxidation to form maleic acid, and then derived by isomerization.

其主要来源是在催化剂存在下将苯氧化生成顺丁烯二酸，再经异构化而得。

The catalytic system composed of NHPI and transition metal ion can catalyze effectively ethane into acetic acid,cyclane into dicarboxylic acid,toluene into benzoic acid,alkene into epoxide,alkyne into acetylenic ketone,and amide into imide;NHPI used alone can catalyze adamantane to be carbonylated,hydrogen peroxide prepared by oxidization alcohol;NHPI combined with as...

NHPI与过渡金属离子组成的催化体系能高效地催化乙烷氧化为乙酸、环烷烃氧化为二元羧酸、甲苯氧化为苯甲酸、烯烃氧化为环氧化物、炔烃氧化为炔酮、酰胺氧化为酰亚胺；NHPI单独使用能催化金刚烷发生氧化羰基化反应、催化氧化醇制取过氧化氢；NHPI与有机助催化剂如偶氮二异丁腈、溴化季铵盐、蒽醌和醇等也能催化分子氧氧化反应。

Mono-cinnamyl maleate was prepared by esterification of maleic anhydride and cinnamyl alcohol of 1 mol:2 mol at 95 ℃ for 2～4 h.Then added isomeric catalyst and mono-cinnamyl fumarate was made by reacting at 90 ℃ for 4 h.After methanol (methanol:mono-cinnamyl fumarate = 6 mol:1 mol) was added,the mixture maintained at 90 ℃ for 4.0 h to synthesize CMF.

合成试验表明：以摩尔比为1：2的马来酸酐与肉桂醇在95 ℃醇解反应2～4 h后加入异构化催化剂，90 ℃转型反应4 h后，添加6倍摩尔质量的甲醇，在90 ℃恒温反应4 h，反丁烯二酸桂醇甲酯的合成产率较高。

ABSTRACT In this paper, by employing dicarboxylic acids with special conformation, i.

利用几个结构上有特点的二元羧酸，即2，6-吡啶二甲酸、三个异构体苯二甲酸，顺丁烯二酸和4，4'-联苯甲酸作为首要桥基配体，并结合使用含氮中性配。。。

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。