查询词典 catalysts

In part one, the properties of catalysts such as iodine, platonic complex, transitional metal oxide and vanadium-containing heteropolyacid were studied in oleum and the process conditions were also analyzed.

催化剂开发中，制备了系列铂配合物催化剂和含钒杂多酸系列催化剂，并对制得的含钒杂多酸系列催化剂进行了XRD、IR、TG表征，确证了催化剂的组成、结构等，考察了催化剂中含钒量不同的催化剂其催化性能与含钒量的关系。

Catalysts with high activity and stability were prepared by impregnating nickel and cerium nitrates solution onto natural olivine carrier.

浸渍法制备了添加Ce的Ni基镁橄榄石催化剂，Ce的添加改善了催化剂的活性和稳定性。

Over the past decades, various efficient methods based on organometallic homogeneous catalysts have been developed.

在过去的三十多年里，合成化学家们将更多的目光集中到金属有机化合物均相催化剂上，设计合成了许多金属配合物催化剂。

The development of recyclable process for organometallic catalysts by simple phase separation has been reviewed .

以可简单分离回收、可反复使用为目标，详细介绍了相转移催化的变化发展过程。

The calcination of the catalysts at high temperature may easily result in theformation of tetrahedral structure Mo species before sulfidation,and decrease theamount of octahedral coordination Mo species.The sinter and loss of the activecomponents would take place during the calcination at overhigh temperature. Meanwhile,the active component could react with support,thus made the activecomponents entered into support bulk phase.

7催化剂在硫化前进行高温焙烧，容易形成四面体结构的钼物种，而八面体配位钼物种减少，且过高的焙烧温度易使活性组分发生烧结，同时可能发生活性组分的流失或与载体发生反应进入载体体相。

The second part of the thesis concerns the synthesis and application of the new air oxidation catalysts.

论文的第二部分是新型空气氧化催化剂的合成及应用研究。

The effect of various conditions on the reaction, such as solvent, temperature, the amount of catalysts,the concentration of hydrochloric acid, the amount of hydrochloric acid, oxygen/air and so on, was studied.

在此基础上，系统地考察了溶剂、温度、催化剂各组分的用量、盐酸的浓度、盐酸的用量、氧气/空气等因素对芳香化合物氧化氯化反应的影响。

Many of these compounds are coloured and paramagnetic and often act as catalysts.

其中许多是有色金属和顺磁体，往往可用作催化剂。

With trimethyl,4-dodecylbenezyl ammonium chloride and 18-crown-6 as pase-transfer catalysts, the azidation of polyepichlorohydrin in poly and H2O were studied. The reaction discipline and mechanism were discussed. The results show that the system with trimethyl, 4-dodecylbenezyl ammonium chloride as phase transfer catalyst and PEG as medium is a safe and effective approach to glycidyl azide polymer preparation, and azidational ratio of PECH can reach 97% above within 15 h.

研究了氯化十二烷基苄基三甲基铵和18-冠－6为相转移催化剂时端羟基聚环氧氯丙烷在聚环氧乙烷和水为介质中的叠氮化反应，探讨了反应规律和反应机理，结果表明：以PECH为介质，十二烷基苄基三甲基氯化铵(TMDA-1)为相转移催化剂的反应体系，可在15h内使PECH叠氮化转化率达到97%以上，无主链断裂等副反应，是一条较为安全快速的制备叠氮粘合剂的方法。

It has been widely used in industry and living, such as tonnages, petrochemistry, and catalysts.

在工业生产和生活中，也得到了广泛应用，如鞣革，石油化工和精细化工中用的催化剂等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐