查询词典 olefin

Therefore, it isthe emphasis to enhance the thermal stability and improve their tolerance of rutheniumcarbene complexes in olefin metathesis at present.

因此，提高钌卡宾配合物的稳定性，改善其对较强配位能力官能团容忍性是目前烯烃交互置换反应研究的重点。

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。

Propylene production methods including olefin metathesis and catalytic cracking were introduced.

介绍了烯烃经歧化反应和催化裂解生产丙烯的方法，列举了国内外各大化工企业在该领域的研究及应用状况。

The experimental results showed that the composition of dry gas produced from Daqing VGO in the presence of acidic catalyst was similar to that of cracking FCC olefin enriched gasoline,and dry gas was mainly produced through monomolecular mechanism.

结果表明，大庆蜡油在酸性催化剂上反应所产生的干气组成与高烯烃催化裂化汽油相同，干气的产生主要是单分子裂化反应所造成的。

The 220 kt/a hydrogenation unit for FCC naphtha to reduce olefin and sulfur is evaluated in this paper.

阐述了220 kt/a催化裂化汽油加氢脱硫异构降烯烃装置的运行和标定情况。

Recent-year studies demonstrate that wax consists of not only high-molecular-weight normal alkane, hut also isoalkane, naphthene and olefin; and the origin of wax is not only from high plant, but also lower hydrobiont and lacustrine algae which are as important contributors to the wax.

并认为蜡不仅仅源于高等植物，低等水生生物和湖相藻类对蜡也是重要贡献者。南阳凹陷原油含蜡量高达40%~60%，烃源岩有机质以偏腐殖的混合型为主。

Ozone is formed in the reaction, and a nitro derivative of the olefin.

在反应中形成臭氧及烯烃的硝基衍生物。

The current polymer materials for optical disc substrate usually include polycarbonate, poly, epoxy resins and noncrystalline cyclo-olefin copolymer developed in recent years.

光盘基板材料主要包括传统的聚碳酸酯、聚甲基丙烯酸甲酯、环氧树脂以及近年发展起来的非晶环烯烃聚合物。

Exact butene, hexene and octene copolymers are a family of ethylene alpha olefin plastomers that bridge the gap between elastomers and plastics

烯烃塑性体产品系列之一，可满足介于弹性体和塑料之间的产品需求aExact丁烯、己烯和辛烯共聚物，属于乙烯

Exact butene, hexene and octene copolymers are a family of ethylene alpha olefin plastomers that bridge the gap between elastomers and plastic s

烯烃塑性体产品系列之一，可满足介于弹性体和塑料之间的产品需求aExact丁烯、己烯和辛烯共聚物，属于乙烯

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。