查询词典 benzyl

In this thesis, a novel polymerizable cation amphiphilic compound, 4-2-(acryloyloxy ethoxy benzyl tri-ethyl ammonium bromide, was synthesized.

中国科学院研究生院，有机化学，2009年，博士

The process includes the following steps: dissolving bromine in halogenated hydrocarbon, dropping the bromine solution into reactant system comprising pentabromo toluene, halogenated hydrocarbon, free radical initiator and hydrogen peroxide at 50-65 deg.c, and heating to 60-78 deg.c for reflux reaction until the reactant system becomes transparent; filtering the resultant to obtain solid product, washing with carbon tetrachloride and water separately and vacuum drying to obtain pentabromo benzyl bromide.

具体步骤为：将五溴甲苯、卤代烃、自由基引发剂和过氧化氢组成的反应体系加入到三颈瓶中，将0.07～0.1mol的溴溶于50ml卤代烃配成溶液，在50-65℃温度下滴加到反应体系中，滴加时间为50-70分钟，然后升温至60-78℃温度下回流反应，至反应体系逐渐变透明，且不再产生气泡时，将所得产物过滤，得到固体产物，分别用CCl 4 和水洗涤，真空干燥，即得到五溴苄基溴；其中，五溴甲苯与溴的摩尔比为1∶0.7-1∶1.0，溴与过氧化氢的摩尔比为1∶1.0-1∶1.4，自由基引发剂加入量为五溴甲苯重量的1-10％，卤代烃的加入量为反应体系体积的40％-100％，所用溶剂可以直接进行下一批反应，不需要更换溶剂或蒸馏提纯。

The carbon tube ubstituted by benzyl chloride which is manufactured in the invention can adopt free radical addition reaction.

在本发明中制备苄基氯取代的碳管可以采用自由基加成反应。

The kinetic model of consecutive reaction for chlorination of benzyl chloride was built by analyzing the reaction mechanism and macroscopic stage.

摘 要：通过运用新型的内环流反应器对氯化苄光氯化反应机理和宏观状态的分析，建立了氯化苄氯化的连串反应动力学模型。

Results showed that there are some differences in purity and yield among those 5 methods. Both benzyl chloride method and proteinase K method have better yield, but the purity of the DNA by CTAB method is better than that of others.

结果表明：五种方法所提的DNA纯度及产率有差别，氯化苄法和蛋白酶K法的产率要高于另外三种方法，但CTAB法所提DNA纯度最高。

The optimum conditions were obtained: the amounts of NaOH solution,quaternary ammonium and benzyl chloride are respectively 16 mL,0.4 g and 15 mL; the reaction temperature and time are 120 ℃ and 3 h.

在NaOH溶液用量16 mL，反应温度120 ℃，季铵盐用量0.4 g，反应时间3 h，氯化苄用量15 mL的条件下，竹纤维的接枝率达143.68 %。

The electrochemical behavior was studied at different electrodes by cyclic voltammetry, which showed significant electrocatalytic effect of the silver electrode on the reduction of benzyl chloride.

通过循环伏安法研究了苄基氯在不同电极上的电化学行为，结果表明了银电极对苄基氯的还原具有很强的电催化效果。

The fitted dynamics model parameters are as following:In order to apply the reaction distillation technology in more fields, the methylbenzene side-chain photo-chlorination has been done in the experiment apparatus. The results have proven this technology is feasible and crude benzyl chloride with a purity of 96~98% can be obtained.

估计得到的动力学模型为：为扩大背包式反应精馏耦合工艺的应用范围，在所建立的实验装置上，进行了甲苯侧链光氯化反应的研究，结果表明工艺可行，可以得到含量96～98％的氯化苄粗品。

Effects of reaction temperature, reaction time, the amount of alkali, benzyl chloride and quaternary ammonium on grating rate of benzylated natural bamboo fiber have been discussed.

以接枝率为考察目标用正交试验探索了反应温度，碱用量，反应时间，氯化苄及助剂季铵盐的用量5个因素对天然竹纤维苯甲基化改性的影响，确定了最佳反应条件。

In the present dissertation, the principles and application of the reaction rectification techology in the syntheses of benzyl chloride, chloroacetic acid, monochloroacetone were approached.

本论文采用反应精馏技术氯化苄的合成、氯乙酸的合成进行了认真的研究，并且对一氯丙酮、氯苄系列产品进行了反应精馏研究，都得到了理想的结果。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。