烯烃

Seven major methods and their reaction characteristics for the synthesis of primary vicinal diamines starting from epoxides, and alkenes etc.

文摘：详细综述了从环氧化合物、烯烃等为起始原料合成一系列一级邻二胺的七条主要路线，并比较了各条反应路线的特点。

The preparation of epoxides by reaction between alkyl peroxides and olefins catalyzed by high-valent transition metal complexes is one of the most important means of preparation of epoxides.

以高价过渡金属配合物为催化剂，催化烯烃直接环氧化反应是合成环氧化合物的重要途径之一。

They may also be converted to ethers and olefins.

醇又能转化为醚和烯烃。

The combination of these hydrides with some transition metal complexes exhibits high catalytic activity for the hydrogenation of olefins.

它们具有比一般市售碱金属氢化物高得多的反应活性，并能与过渡金属配合物组成高活性烯烃加氢催化。

The coupling reaction of aryl iodides, bromides and chlorides with differentolefins catalyzed by catalyst 2 and 4 was studied. It was found that compounds 2 and 4 anchored on active carbon are efficient catalyst for the Heck reaction in the case of aryl bromides and aryl chlorides as substrates (Scheme 3). It is notable that catalyst 4 has higher efficiency for aryl chlorides.___^H Cat.2 or 4, Base HXSolution, 100C or 140

以化合物2和4为代表，重点研究了活性炭负载的二茂铁亚胺环钯化合物催化碘代苯、溴代苯和氯代苯与活泼烯烃之间的偶联反应(Scheme 3)，发现活性炭负载的二茂铁亚胺环钯化合物2和4均可用于催化多种溴代和氯

This paper aimed as the separation of α-olefins from kerosine distillate of delayed-coking process and their application.

本文研究了采用尿素脱蜡工艺从延迟焦化柴油中分离出C〓-C〓的直链α烯烃和直链烷烃的工艺路线，其中采用异丙醇和水混合溶剂溶解尿素，与焦化柴油进行络合反应，这在文献中尚未见报导。

The Straight Run and Hydrocracked Naphthas are combined and pretreated and stripped in the Naphtha Hydrotreating unit to remove sulfur , nitrogen compounds , mental, olefin and water.

直馏石脑油和加氢裂化石脑油混合后在石脑油加氢装置通过加氢处理及汽提脱去硫、氮、砷、铅、铜、烯烃和水等杂质。

The olefines (mainly C4 olefines)in the liquefied petroleum gas under the action of a selective catalyst were polymerized to form heigher molecular weight diners and trimers.

IMt石油液化气中的碳四烯烃在催化剂的作用下，选择叠合成分子量较大的聚合体。

The influences to different compounds in the system caused by different temperatures, pressures, methane and oxygen molar ratio have been tested.

通过计算，得到了该体系有利于烯烃生成的反应条件，500℃～800℃、1.5MPa、烷氧摩尔比为7。

Hell higherolefins process is nowadays the most advanced and the ripest process.

HOP工艺是目前世界上最先进、最成熟的α-烯烃生产技术。

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。