catalyst 雅思GREGMAT

CuFe-PILC catalyst was prepared by doping technology during the preparation process of pillaring agent.

在此础上对其进行掺杂改性，获得了铜铁复合层柱粘土催化。

N,N-diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.

以苯胺和溴乙烷为原料,用四乙氢氧化铵作相转移催化,在常压下合成N,N二乙苯胺。

The research on the amino acid by dehydrogenation alkanolamine(s) in catalyst was recommended.

介绍了国内外醇胺催化脱氢制备氨酸发展情况。

Propylene glycol monoether acetate was synthesized using heteropoly acid as catalyst for the firsttime.

首次以杂多酸为催化采用酯化法合成丙二醇单乙醚乙酸酯。

The workers’ demand for better conditions was a catalyst for social change.

工人们要求改善工作条件促进了社会变革。

It acts as a catalyst in the process of fermentation.

它在发酵过程中起触媒作用。

A catalyst is a substance which speeds up a chemical reaction.

催化是一种能加速化学反应物质。

Resinification of furfural on the catalyst was the main cause of deactivation.

糠醛树脂化结焦是导致催化失活主要原因。

Bromooctane was synthesized from industrial hydrobromic acid(48%) and n-octanol using concentrated sulfuric acid as catalyst.

以工业废氢溴酸(48%)为原料,在浓硫酸存在下,与正辛醇进行反应合成1-溴辛烷。

Ethyl lauryl alcohol respectively react with hydrobromic acid to product bromohydrocarbon,sulfuric acid for catalyst。

以正十二醇和氢溴酸为原料,在浓硫酸催化下,生产溴十二烷。

Firstly, p-methylacetophenone was obtained in the presence of alchlor as the catalyst, and the optimum condition was 4:1:2 in molar ratio for toluene, acetic anhydride and alchlor with yield of 86.2%.

首先，以甲苯和乙酸酐为原料，在催化三氯化铝存在下合成对甲苯乙酮，并确定甲苯，乙酸酐和三氯化铝最佳摩尔比为4: 1: 2，收率为86.2%。

This paper introduces the light gaso line etherify technology,brings fo rward the project of building the light gasoline etherify device on th e catalyst cracking cell in the refin ery plant.

介绍了轻汽油醚化技术,提出了在炼油厂催化裂化单元建设轻汽油醚化装置方案。

With the help of a prison bus driver, Lee Marvin (Richard Roundtree), Wilson acts as a catalyst, putting a plan into action that will bring an untimely end to Mackey Willis.

在一名监狱司机Lee Marvin (Richard Roundtree)帮助下，Wilson就如同成了Mackey犯罪催化，但也在行动中制定计划准备抓捕Mackey Willis。

Dimethyl phenylethyl carbinyl acetate (DPCA ) was synthesized by using a new catalyst. This technology decreases the pollution and can also be used in synthesis of other carbinyl acetates perfume.

用一种新型催化合成乙酸二甲苯乙原酯(DPCA),并简化了合成工艺,减少了生产过程中产生三废,因而投入生产已具备了必要条件。这种新型催化可用于其它原酯类香料合成。

The catalyzed asymmetric synthesis was the effective method to prepare the optics active compounds, the pentamethide obtaines the widespread application as the reagent or the catalyst in this domain.

催化不对称合成是制备光学活性化合物有效方法，金属有机化合物作为试或催化在这一领域得到了广泛应用。

The catalysts used to hydrogenate polymer containing polydiolefin units are introduced in this paper.The mechanism of SBS hydrogenation and the development of the kinetics are also referred to.

介绍了目前用于含聚双烯烃链节聚合物加氢催化种类，讨论了SBS加氢机理及加氢动力学进展。

Development trend of domestic third-stage multiclone is expounded as well as the problems such as single tube wearing, low capacity of single tube and the inappropriate catalyst exhaustion.

介绍了国内多管式三旋发展概况、存在主要问题,如单管磨损、单管处理量小、催化排放不合理等。

JCQ depurant-muffler is adopted on 49ZQ engine using small rare-earth element balls as catalyst and took the method of quadrature frequency band optimization to opetmize the configuration parameters.

用于492Q发动机JCQ净化消声器采用稀土小球为催化，用正交频带加权优化法优选消声器结构参数，取得良好消声、净化性能。

This paper discusses the fundamentals and characteristics of catalytic combustion and the type of catalyst and approaches the way to apply the technology of catalytic combustion in cremator.

本文对催化燃烧法本原理、特点及催化形式等方面进行了讨论,并就催化燃烧技术在火化设备中实现可能方法进行了探讨。

The overall height of catalyst bed as well as the optimal feeding point was obtained for different detritiation efficiency under specific mass transfer coefficient of catalysts.

根据不同催化传质性能,计算了为达到特定脱氚率和电解池浓缩倍数所要求交换床总高度和进液位置。