catalyst 雅思GREGMAT

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

以苯胺和溴烷为原料,用四基氢氧化铵作相移催化剂,在常压下合N,N基苯胺。

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

糠醛树脂化结焦是导致催化剂失活的主要原因。

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

催化剂是一种能加速化学反应的物质。

It acts as a catalyst in the process of fermentation.

它在发酵过程中起触媒的作用。

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。

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

在此基础上对其进行掺杂改性，获得了铜铁复合层柱粘土催化剂。

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基酸的研究发展情况。

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

首次以杂多酸为催化剂采用酯化法合丙醇单醚酸酯。

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

以正十醇和氢溴酸为原料,在浓硫酸的催化下,生产溴十烷。

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1-溴辛烷。

Nitrodiphenylamine is synthesiized by direct condensing method,adsopting aniline and 2-nitrochlorobenzene as feeds,PEG as phase transfer catalyst.

以苯胺、邻硝基氯苯为原料,采用直接缩合法引入相移催化剂合邻硝基苯胺。

The best reaction condition are determined when synthesizing dibutyl maleate by using sloid chloride as catalyst.

提出了以固体氯化物为催化剂合马来酸丁酯的最佳反应条件。

The performance of this catalyst for the cross-coupling reaction of iodobenzene with acrylic acid was studied.

研究了该催化剂对碘代苯与丙烯酸交叉偶联生反式-肉桂酸的催化性能。

The fuberidazole was prepared by reaction of O-phenylendiamine with furfural at the presence of CTMABas catalyst.

以邻苯胺和糠醛为原料,以十六甲基三烷基溴化铵(CTMAB)为催化剂合了麦穗宁。

The synthesis of nerolin bromelia by use of various phase transfer catalysts at different conditionsis studied.

研究了利用多种相移催化剂在不同条件下合橙花素。

All of these show that the DHT-1 catalyst can be well matched with the hydrodewaxing catalysts.

以上结果表明，DHT-1能与异构降凝剂较好地匹配使用。

To optimize the process of prepartion isorotenone from rotenone by using Lewis acid AlCl3 as catalyst.

为了优化鱼藤酮异构化制备异鱼藤酮的工艺。

Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied.

以BTEAC(苄基三基氯化铵)为相移催化剂合了异烟酸酯。

N,N-diethylaniline was synthesized from aniline with bromoethane using tetraethylammonium chloride as phase transfer catalyst under atmospheric presure.

用四基氯化胺作相移催化剂可在常压下由苯胺和溴烷合N,N-基苯胺。

By using phase transfer catalyst, the yield of the preparation of cyclopropane carboxylic isopropyl ester was increased.

在环丙甲酸异丙酯的合反应中,通过相移催化剂提高了反应收率。