catalyst 雅思GREGMAT

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

首次以杂多催剂采用酯法合成丙二醇单乙醚乙酯。

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

介绍了国内外醇胺催脱氢制备氨基的研究发展情况。

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

以正十二醇和氢原料,在浓硫的催下,生产十二烷。

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

以工业废氢(48%)原料,在浓硫存在下,与正辛醇进行反应合成1-辛烷。

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

糠醛树脂结焦是导致催剂失活的主要原因。

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

催剂是一种能加速学反应的物质。

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进了社会变革。

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

以苯胺和乙烷原料,用四乙基氢氧铵作相转移催剂,在常压下合成N,N二乙基苯胺。

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剂。

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

以苯胺、邻硝基氯苯原料,采用直接缩合法引入相转移催剂合成邻硝基二苯胺。

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

研究了利用多种相转移催剂在不同条件下合成橙花素。

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

了优鱼藤酮异构制备异鱼藤酮的工艺。

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。

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

以邻苯二胺和糠醛原料,以十六甲基三烷基铵(CTMAB)催剂合成了麦穗宁。

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

提出了以固体氯物催剂合成马来二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.

研究了该催剂对碘代苯与丙烯交叉偶联生成反式-肉桂的催性能。

Activated carbon as the sorbent and catalyst support was capsulated with ethyl cellulose by phase separation methods.

摘要对兼具吸附和催剂载体功能的多孔结构活性炭，以乙基纤维素材料用相分离进行包覆。

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

用四乙基氯胺作相转移催剂可在常压下由苯胺和乙烷合成N,N-二乙基苯胺。

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)相转移催剂合成了异烟乙酯。