查询词典 catalysts

In modern chemical engineering, inorganic acids and metal haloids are wildly used as catalysts in esterification, such as sulfuric acid, phosphoric acid and AlCh, SnCU, TiCU.

目前，在工业化生产中，对于酯化反应多采用浓硫酸、磷酸等无机酸或金属卤化物，如AlCl_3、SnCl_4、TiCl_4等作为催化剂。

Catalysts of this invention, applied in the reaction of selective oxidation of carbon monoxide to carbon oxide from hydrogen－rich gas mixtures, exhibited highly catalytic activity and excellent selectivity.

本发明之触媒应用在由富氢气体混合物中将一氧化碳选择性氧化成为二氧化碳反应中，显现出高催化活性及优越的选择率。

In the synthetic work, the effect of bases, which are used as catalysts, to the reaction between the cyclic imides including polyamide and the methyl bromoacetate was studied.

在合成过程中，研究了不同的碱做催化剂对含有环状酰亚胺以及多个酰胺键的两种化合物与溴乙酸甲酯反应的影响。

Catalytic enantioselective reduction of imines and enamines represents one of the most straightforward and efficient methods for the preparation of chiral amines, which are not only important building blocks of many natrural products and chiral drugs, but also can serve as useful resolution reagents, chiral ligands and chiral catalysts.

中文摘要手性胺不仅是许多天然产物和手性药物的重要结构单元，而且也是非常有用的拆分试剂、手性配体和手性催化剂。

These catalysts were found to have good activity and reusability in the Heck vinylation of aryl iodides and acrylate, among which the ethylenediamine modified resin supported Pd(0) catalyst kept a high activity at the 17th run at 90℃.

结果表明，该类催化剂具有良好的催化活性和重复使用性能，其中用乙二胺功能化树脂负载的Pd(0)催化剂在90℃重复使用17次时能保持良好的催化活性。

The traditional technology of iron carbide production exists the problem that the reaction time is too long. The research of adding the additive into the ore of the fluid-bed was carried out in order to find the catalyst of this reaction. It was found out that K2CO3 and CaCl2 can be the catalysts of this reaction. The reacting time and equilibrium data in addition of K2CO3 and CaCl2 were examined and were campared with the contrastive experimental results respectively. The theoretical dynamics analysis also reveals that both K2CO3 and CaCl2 can accelerate the iron carbide forming reaction.

摘 要：传统的碳化铁生产工艺存在反应时间较长的难题，为此通过在流化床入炉矿石中配加部分添加剂的还原实验研究，以寻求该反应可能的催化剂，缩短反应时间，提高碳化铁生产效率和经济效益采用CaCl2和K2CO3作为反应的催化剂，利用反应所测数据，与对比实验相比较，并结合动力学分析，得出CaCl2和K2CO3可以加速碳化铁还原反应进行的结论。

A catalyst carrier was designed and synthesized under a new concept. After carrying a precious metal, a new generation of catalysts was obtained. This catalyst can convert straight chain alkanes to isomerized alkanes effectively.

采用新概念设计并合成出催化剂载体，担载贵金属后获得新一代催化剂，该催化剂可在低压条件下，高效率地把直链烷烃转化为异构烷烃。

The present invention relates to the use of insect esterases or lipases, or mutants thereof, as catalysts in biotransformation processes.

本发明涉及昆虫酯酶或脂肪酶，或其突变体在生物转化过程中作为催化剂的应用。

Up to date processes and catalysts in the world for upgrading heavy coal liquid s have been reviewed.

评述了世界上最新的煤液化粗油提质加工工艺和催化剂。

The catalytic activities of 〓 and 〓 catalysts increase with the Mo loadings.

在Mo的担载量相同的情况下，肼分解催化活性顺序是：〓＞〓＞〓。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。