catalyst 雅思GREGMAT

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

在此础上对其行掺杂改性，获得了铜铁复合层柱粘土。

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,用四乙氢氧铵作相转移,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.

介绍了国内外醇胺脱氢制备氨酸的研究发展情况。

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

首次以杂多酸为采用酯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了社会变革。

It acts as a catalyst in the process of fermentation.

它在发酵过程中起触的作用。

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

是一种能加速学反应的物质。

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

糠醛树脂结焦是导致失活的主要原因。

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,在浓硫酸的下,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，在三氯铝存在下合成对甲苯乙酮，并确定甲苯，乙酸酐和三氯铝的最佳摩尔比为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.

介绍了轻汽油醚技术,提出了在炼油厂裂单元建设轻汽油醚装置的方案。

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)的帮助下，Wilson就如同成了Mackey犯罪的，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.

用一种新型合成乙酸二甲苯乙原酯(DPCA),并简了合成工艺,减少了生产过程中产生的三废,因而投入生产已具备了必要条件。这种新型可用于其它原酯类香料的合成。

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.

不对称合成是制备光学活性合物的有效方法，金属有机合物作为试或在这一领域得到了广泛的应用。

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的聚合物加氢的的种类，讨论了SBS加氢的机理及加氢动力学的研究展。

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的发展概况、存在的主要问题,如单管磨损、单管处理量小、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发动机的JCQ净消声器采用稀土小球为，用正交频带加权优法优选消声器结构参数，取得良好的消声、净性能。

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.

本文对燃烧法的本原理、特点及的形式等方面行了讨论,并就燃烧技术在火设备中实现的可能方法行了探讨。

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.

根据不同的传质性能,计算了为达到特定脱氚率和电解池浓缩倍数所要求的交换床总高度和液位置。