查询词典 catalyst

With the catalyst TiO2/SO(superscript 2- subscript 4), 2, 4, N-trinitroanilinoacetic acid was synthesized from chlorobenzene and glycine with yield of 71.6%.

以纳米固体酸TiO2/SO(上标 2-下标 4)为催化剂，氯苯和氨基乙酸为原料直接合成了2，4，N-三硝基苯胺基乙酸，收率为71.6%。

In other words, silicon powder and chloromethane are converted into a mixture of methyl chlorosilane in the presence of catalyst under pressure and heat, and then the intended fraction is separated by efficient fractionation.

产品主要以有机硅单体为原料，采用不同的聚合手段和工艺，添加各种填料和助剂制得。

The experimental results show that:Under the conditions of reaction temperature 350℃,space velocity 4 800 h~(-1)and volume ratio of air to waste gas 15,the conversion rates of chloromethane and total hydrocarbon are all larger than 99%;There is almost no phosgene generation;HCl in the tail gas of oxidation can be well absorbed by NaOH solution;The activity of the catalyst usingγ-Al_2O_3 a...

实验结果表明：在反应温度为350℃、空速为4 800 h~(-1)、空气与氯甲烷废气的体积比为15的条件下，氯甲烷转化率和总烃转化率均大于99%，催化氧化过程中基本不产生光气；催化氧化反应后尾气中的HCl用NaOH溶液作吸收剂的吸收效果较好；γ-Al_2O_3为载体的催化剂活性基本稳定。

Alkylations of benzene with dodecene and/or chloromethane in the room temperature ionic liquid 1-methyl-3-butylimdazole chloride-aluminium chloride as catalyst have been investigated with high conversion and selectivity.

首次研究了在氯铝酸室温离子液体系中二甲苯与苯乙烯的烷基化反应制1-苯基1-二甲苯基乙烷及其衍生物。考察了离子液体催化剂量和反应条件的不同对产物组成及副产物数量的影响。

Chlorophenol (4-CP) solution was treated by US/UV synergetic catalysis technology and the major influencing factors such as the sound intensity, initial pH value of solution, initial 4-CP concentration, the amount of catalyst and medium temperature were examined in this paper.

选择掺杂过渡金属离子Fe3 +的纳米TiO2 为催化剂，研究了US UV协同催化氧化水中对氯苯酚(4 CP)的降解效果，考察了对氯苯酚的起始浓度、超声波声强、溶液初始pH、饱和气体种类、反应温度和催化剂投加量对氯苯酚降解速率的影响。

Chlorophenol （4-CP）; US/UV; catalyst ; synergetic effect

对氯苯酚（4-CP）； US/UV；催化剂；协同效应

Photo catalyst has the similar function of chlorophyl to supply the reaction space while without chemical reaction so that can be used for long time.

光触媒质类似于植物光合作用中的叶绿素，只提供了反应场所，本身不参与化学反应，所以能够长期使用。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

The method of catalytic synthesis of benzyl cinnamate with hexadecyl trimethyl ammonium chloride as phase transfer catalyst is studied.

以十六烷基三甲基氯化铵为相转移催化剂催化合成肉桂酸苄酯，考察了催化剂、温度、时间和物料配比等因素对反应的影响。

Butyl cinnamate was synthesized from cinnamic acid and butyl alcohol using tungstosilicic acid as catalyst.

以钨硅杂多酸为催化剂，通过肉桂酸和正丁醇反应合成肉桂酸正丁酯。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷