丙二烯

The p-Isopropylbenzoic acid was synthesized by catalytic transfer dehydrogenation with 5% Pd/C using dihydrocumic acid as material and hydrogen offer, industrial dipentene as hydrogen acceptor and solvent, reacted directly under reflux condition.

采用5% Pd/C作为转移氢催化剂，原料二氢枯茗酸为氢给予剂，以工业双戊烯作为氢接受剂和溶剂，合成了对异丙基苯甲酸。

It has yearly produces 60,000 tons monoammonium phosphates, 18,000 ton chlorinated paraffin wax, 6000 tons nitrocottons, 5000 tons glutaric dialdehydes, 4000 ton acrolein productivities.

具备年产6万吨磷酸一铵、1.8万吨氯化石蜡、6000吨硝化棉、5000吨戊二醛、4000吨丙烯醛生产能力。

Synthesis and Insecticidal Activity of 1, 1-Dichloropropenyl Derivatives

新型1，1-二氯丙烯衍生物的合成及杀虫活性研究

Acidic ion-acidic resin can also be used as a catalyst for organic synthesis, it's used instead of concentrated sulfuric acid can be catalyzed synthesis of dihydro-coumarin compounds [1], High purity isopropenyl acetate [2] and other organic compounds.

酸性离子酸性树脂也可作为一种有机合成催化剂，用它替代浓硫酸可催化合成二氢香豆素类化合物[1]，乙酸异丙烯酯[2]等有机化合物。

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; and a mixture of two or more different selectivity control agents, said SCA mixture comprising from 1 to 99 percent of one or more esters of one or more aromatic monocarboxylic acids or substituted derivatives thereof, and from 99 to 1 percent of one or more alkoxysilane compounds.

一种用于丙烯聚合的催化剂组合物，包括：一种或多种齐格勒-纳塔主催化剂组合物，该齐格勒-纳塔主催化剂组合物包括一种或多种过渡金属化合物和一种或多种芳族二羧酸酯内部电子给体；一种或多种包含铝的辅催化剂；和两种或更多种不同的选择性控制剂的混合物，所述SCA混合物包括1到99％的一种或多种芳族单羧酸的一种或多种酯或其取代衍生物、和99到1％的一种或多种烷氧基硅烷化合物。

In this dissertation, polyethylene glycol monomethyl ether of 2000 molecular weight as soluble support, an array of soluble polymer-supported tartrate esters were designed, synthesized, and applied in asymmetric epoxidation of allylic alcohols.

本论文以平均分子量为2000的聚乙二醇单甲醚为可溶性支载体设计和合成了一系列可溶性聚合物支载的酒石酸酯配体，并将它们用于烯丙基醇的不对称环氧化反应。

So the bio (β-acryloxyl ethyl) esters of acrylic rosin (AR-2-HEA) with majorcomposition of bio-(β-acryloxyl ethyl) esters of acrylic pimaric acid were also prepared through acylchloridation and esterification.

同样采用酰氯化、酯化手段合成了丙烯酸松香酯，其主要组成为丙烯海松酸二酯。

Currently, with its mature condition and complete infrastructure, more than 10 enterprises have entered the town, including China Science Research Institute Guangzhou Chemical Research Institute. A newly-risen industry products group has been formed, including vinyl esters, dimethyl ester, saleratus, degradable polyurethane foam etc.

目前开发利用条件成熟、设施完备，中科院广州化学研究所及10多家生产企业在镇内落户，已初步形成碳酸乙烯酯、丙烯酯、二甲酯以及小苏打、脂肪族聚碳酸亚乙酯、降解型聚氨酯泡沫塑料等新兴产业产品群。

A series of new poly polyamines have been synthesized and characterized by means of element analysis and FT-IR etc. The tough effect of these PPAs on epoxy resin/diethylene triamine systems was examined.

合成了一系列新型的聚氧化丙烯多胺，并对其结构进行了表征，同时研究PPA添加到双酚A环氧树脂-二乙烯三胺体系中对环氧树脂固化过程的影响以及对固化环氧树脂的增韧效果。

Under catalysis of AlCl3, trans-1-chloro-3-phenyl-1-propen-3-one was first prepared using benzoyl chloride and acetylene in CH2Cl2 at 20~25℃, which the yield is 7% higher than that in CCl4 at 40~45℃.

通过对其反应条件的研究，首次用苯甲酰氯和乙炔在三氯化铝作用下合成出反－3-苯基－1-氯－1-丙烯－3-酮；并发现用二氯甲烷作介质在20~25℃下的反应产率，比用四氯化碳作介质在40~45℃下的反应产率约高7%。

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。