烯

A similar reaction of the sulfur analog gave only the product of tetramethylene bridged bisdititanium halides.

在企图合成硫桥环戊二烯基化合物时，得到的却是四亚甲基桥联双环戊二烯基金属衍生物。

A desulfurization method is proposed for the removal of sulfur compounds from FCC gasoline by alkylation reaction of thiophenic sulfur with olefins over acid catalysts, and the higher boiling sulfur-containing products are removed by fractional distillation.

选择以噻吩的甲基取代衍生物(包括 2-甲基噻吩、3-甲基噻吩及 2，5-二甲基噻吩)与异丁烯的烷基化反应为模型反应，考察了经三氯化铝气相固载法改性的 CT175 树脂催化剂催化噻吩的甲基取代衍生物与烯烃的烷基化反应性能。

A series of modified polyurethane elastomer materials with different amino siloxane content were synthesized,which were based on polyoxypropylene glycol,aminoethyl aminopropyl poly,toluene diisocyanate and the curing agent dimethylsulfide toluylenediamine.

以聚氧化丙烯二醇或聚氧化丙烯三醇、氨乙基氨丙基聚二甲基硅氧烷、甲苯二异氰酸酯为原料在无溶剂条件下制备预聚体，利用二甲基硫甲苯二胺为固化剂合成一系列氨基硅油改性聚氨酯弹性体材料，并对材料的力学性能、耐热性、表面水接触角等性能进行了测试。

The results show that both norbornenic and cyclopentenic double bonds are involved in the polymerization. The propagation on the NB double bond generates structural unit I by direct addition and unit II by carbocation rearrangement, respectively. Similarly, the propagation on the CP double bond produces structural unit III by direct addition and unit IV by transannular rearrangement, respectively.

结果表明， DCPD分子的降冰片烯双键和环戊烯双键均参与了聚合反应并根据不同链增长机理产生四种链结构单元：通过NB双键的链增长反应可生成直接加成结构单元I和重排结构单元II，通过CP双键的链增长反应生成直接加成结构单元III和跨环重排单元IV。

Advances in ethylene selective trimerization catalysts, especially composition, activity and cost of trimerization catalysts and their overall selectivity to 1-hexene.

对乙烯选择性三聚反应进行了论述，着重分析了催化剂的组成、活性、成本和1-己烯的总选择性，并展望了烯烃选择性齐聚反应的发展。

Copolymer of acrylamide and acryloyloxyethyl trimethyl ammonium chloride was prepared by dispersion polymerization in a salt solution.

摘 要：以丙烯酰胺和丙烯酰氧乙基三甲基氯化铵为共聚单体，采用分散聚合法在无机盐水溶液中制备了性能稳定的阳离子聚丙烯酰胺乳液。

Copolymer of acrylamide and acryloyloxyethyl trimethyl ammonium chloride was prepared by dispersion polymerization in a salt solution.

摘 要：以丙烯酰胺和丙烯酰氧乙基三甲基氯化铵为共聚单体，采用分散聚合法在无机盐水溶液中制备了性能稳定的阳离子聚丙烯酰胺水包水乳液。

In the absence of organic solvent and phase-transfer catalyst, the catalytic oxidation of cyclohexene to adipic acid with aqueous 30% hydrogen peroxide by weight can be efficiently catalyzed by tungstenic acid/inorganic acidic ligand.

以钨酸／无机酸性配体为催化体系，在无有机溶剂和相转移剂的情况下，催化过氧化氢(质量分数30％)氧化环己烯合成己二酸。结果表明，以钨酸／磷酸催化氧化环己烯的催化效果最优。

The synthesis of the unbridged metallocene (2, 4-Me〓Ind)〓ZrCl〓, which is not found in reference. Polymerization of ethylene or propylene with the metallocene has high activity. The resulted ethylene/1-hexene copolymer characteristic of uniform comonomer distribution. The catalyst possess commercial value

合成了未见文献报道的非桥联茂金属（2，4-Me〓Ind）〓ZrCl〓，用这种茂金属催化乙烯或丙烯聚合均达到了很高的催化效率，所得的乙烯/1-己烯共聚物表现出共单体分布高度无序的特点，具有工业应用前景

Comparison was synthesized from undecylenic acid and iso-propyl alcohol over HPWA-SBA-15. Comparison was made among different catalysts, and influence of composition and repeated use of the catalyst were investigated.

将该催化剂用於催化以十一碳烯与异丙醇为原料合成十一碳烯酸异丙酯，进行了不同催化剂化剂的对比实验以及催化剂组成和重复使用的考察。

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。