catalyst 雅思GREGMAT

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

以苯胺和溴乙烷为原料,四乙基氢氧铵作相转移剂,在常压下合成N,N二乙基苯胺。

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

糠醛树脂结焦是导致剂失活主要原因。

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

剂是一种能加速学反应物质。

It acts as a catalyst in the process of fermentation.

它在发酵程中起触媒作。

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剂。

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基酸研究发展情况。

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

首次以杂多酸为剂采酯法合成丙二醇单乙醚乙酸酯。

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,在浓硫酸下,生产溴十二烷。

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成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,采直接缩合法引入相转移剂合成邻硝基二苯胺。

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

提出了以固体氯物为剂合成马来酸二丁酯最佳反应条件。

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

研究了该剂对碘代苯与丙烯酸交叉偶联生成反式-肉桂酸性能。

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

以邻苯二胺和糠醛为原料,以十六甲基三烷基溴铵(CTMAB)为剂合成了麦穗宁。

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

研究了利多种相转移剂在不同条件下合成橙花素。

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。

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

为了优鱼藤酮异构制备异鱼藤酮工艺。

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

以BTEAC(苄基三乙基氯铵)为相转移剂合成了异烟酸乙酯。

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

四乙基氯胺作相转移剂可在常压下由苯胺和溴乙烷合成N,N-二乙基苯胺。

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

在环丙甲酸异丙酯合成反应中,通相转移剂提高了反应收率。