查询词典 olefins

Gasolinecontained 67.8% aromatic hydrocarbons, 21.47% olefins and a small quantityof alkanes and cycloparaffin hydrocarbons. The enlarging study on blending feed of vegetable oil and petroleumfraction was performed in a Two-Stage Riser.

通过优化各种因素，植物油的转化率达到81.18%，丙烯产率达到19.52%；汽油的产率为30.58%，其中含有67.87%的芳烃、21.47%的烯烃，以及少量的烷烃和环烷烃，其研究法辛烷值为90.3，抗爆指数为83.9。

The reaction of perfluoroalkyl bromide and a,w-perfluoralkylene dibromide in sulfinatodehalogenation system with olefins and the differences in behavior between perfluoroalkyl bromides and their corresponding iodides are reported.

本文报道溴代全氟烷和α，ω-二溴代全氟烷在亚磺化脱卤反应体系中与烯烃的反应及其与相应的碘代全氟烷的区别。

"Olefins may be classified by whether the double Bond is in a ring or a chain or by the number of double Bonds (monoolefin, diolefin, etc.)."

有两种分类方法︰一、分为环烯烃和非环烯烃，双键依次位于成环碳原子之间或开链基团的碳原子之间。

When used in LAB complex unit with multi-step hydrogenation process,DSH-1 selective hydrogenation catalyst,which contain noble metal Pd,can transmit diolefin s to olefins effectively,and has good activation and selectivity.

DSH -1型含贵金属Pd双烯选择性加氢催化剂与多段加氢工艺结合，应用于脱氢法生产直链烷基苯的联合装置中，能有效地将脱氢过程产生的双烯烃转化成单烯烃，具有很好的反应活性和选择性，且操作弹性大，工艺过程简单。

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

研究表明，在焦化馏出油中含有相当数量的直链α烯烃和直链烷烃，它们都是重要的化工原料。

ASTM D1159-01 Standard Test Method for Bromine Numbers of Petroleum Distillates and Commercial Aliphatic Olefins by Electrometric Titration.

电化学滴定法测量石油馏分及商用脂族烯烃的溴值试验方法。

This will permit the production of TAME from the C5 iso-amylenes and some hexyl ethers from lighter C6 iso-olefins.

这将允许生产温驯从C5 iso amylenes 和一些己基的以太从更轻的C6 iso 烯烃。

Olefin metathesis opens up new industrial processes for the production of important olefins in the field of petrochemicals.

烯烃交叉复分解反应作为石油化工领域一种重要过程，为各种单烯烃间的互相转化提供了一条有效的途径。

In particular, the production of propylene and other important olefins via olefin metathesis reaction from n-butenes feedstock has received considerable attention.

特别是在利用正丁烯生产丙烯和其它重要单烯烃方面，复分解反应受到越来越多的重视。

The influence of the amount of catalyst, reaction temperature, molar ratio of β-methylnaphthalene and olefins, reaction time and the amount of solvent has also been studied in detail.

详细考察了三氯化铝催化剂用量、反应温度、芳烯物质的量比、反应时间及溶剂用量对β-甲基萘与长链烯烃烷基化的影响。

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。