烯烃

The synthesis of flame retardant for cotton with a new catalytic system ;2. Advances in the catalytic system s for synthesis of terephthalic acid via oxidation of paraxylene

在不同二苯基二甲氧基硅烷用量、聚合温度及聚合时间等条件下，考察DDS对α-烯烃聚合载体型催化体系活性中心的影响。

The results showed that the partial pressure of n-hexane had little influence on...

结果同时表明与正己烷相比，混和溶剂(25%正己烷和75%正葵烷)具有较高的1-烯烃选择性。

A hydrogenation catalyst contained Co-Mo-Ni active component was used for preparation of pentane with the raffinate of 5-carbon fraction from steam cracking as the raw material.

对活性成分为Co-Mo-Ni的LY-9702加氢催化剂催化蒸汽裂解抽余C5馏分(含60％左右的C5烯烃)制戊烷的工艺条件进行了试验研究。

Use of the invention catalyst to polymerize alpha-olefins is exemplified.

本发明的催化剂可用于聚合α－烯烃。

This invention relates to a primary catalyst component for polymerization of olefins and its preparation.

本发明公开了一种用于烯烃聚合的主催化剂组分及其制备方法。

The experimental results show that the extract yield of Zanthorylum bungeanum oil from nucleus and shuck is 7.8% and 48.9%,respectively.

花椒油是从花椒籽核和壳中提取的一种天然挥发油，其成分以烯烃为主，随产地不同有

In this paper, the carbonylation has been studied of olefins in different solvent systems.

本文研究了烯烃在不同溶剂体系中进行羰基化反应的规律。

Success in this technique would, however, depend on the development of a highly selective sorbent with a high selective adsorption capacity to sorbate.

吸附脱硫和吸附分离烯烃是选择性吸附分离技术两个主要的应用方面。

FT-IR and UV-vis spectra indicated the existence of tetrahedrally coordinated Ti atoms, which may act as active sites for epoxidation of olefin.

FT-IR和UV-vis结果说明该沸石骨架在存在四配位钛，从而有可能成为催化烯烃环氧化反应的活性中心。

The results indicate that biodegradable base oil s markedly promote biodegradation of the unreadily biodegradable oils because of the activation of enzyme in the body of microbe and the increment of specific microbe by inducement and domestication of biodegradable base oil .

研究了生物易降解菜籽油和合成酯类油对生物难降解矿物油和高粘度聚α-烯烃生物降解性能的影响，探讨了复合基础油生物降解性能改善的机制。

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。