考察

The effects of catalyst, catalyst promoter, ratio and amount of catalyst and catalyst promoter, temperature, reaction time and pressure on the selectivity and yield of benzaldehyde have been investigated.

重点考察了催化剂种类、助催化剂种类、催化剂和助催化剂的配比和用量、反应温度、反应时间和反应压强等因素对苯甲醛的选择性和收率的影响。

And 100%, respectively, under optimized reaction conditions. The existence of electron-donating groups on the benzene ring would enhance the activity of phenols.

使用苯酚作反应底物考察了各因素的影响，在优化的反应条件下，苯酚的转化率可达到99.8％，产物苯甲醚的收率高达99.8％。

In this paper,the detailed preparation process of gas chromatographic column for separating benzene series was introduced,the optimum column temperature and flow rate of carried gas were selected for separation the mixture of cyclohexane,benzene and toluene,and the column performance has been studied in respects to column efficiency and separating size.

本文主要介绍了气相色谱柱的详细制备过程，并以环已烷、苯和甲苯的混合物的分离为例，选择了最佳的操作条件。同时从柱效率和分离度两方面考察了该色谱柱的柱性能。

The effects of reactant ratio, catalyst amount, reaction time and temperature on the yield of p-nitro-ethyl benzoate were discussed.

以硫酸氢钾为催化剂，合成对硝基苯甲酸乙酯，并对影响产率的诸因素进行了考察。

The effects of catalyst amount, mole ratio of sodium benzoate and benzyl chloride, reaction time on the esterification rate were studied.

考察了催化剂用量、釜残液与氯化苄的物质的量的比和反应时间对收率的影响。

P-Nitro-ethyl benzoate was synthesized with potassium bisulfate as catalyst for the first time.

以硫酸氢钾为催化剂，合成对硝基苯甲酸乙酯，并对影响产率的诸因素进行了考察。

The products were recrystallized by petroleum ether. The purity of 1,2 bis chlormethyl benzol was beyond 98%.

考察了邻二-苯在ZnSO4 催化剂存在下反应条件对合成邻苯二甲醛的影响。

Benzonitrile was selectively hydrogenated into benzylamine under mild conditions over activated amorphous nickel aluminium alloy catalyst which was prepared by rapidly quenching method.

由铜鼓快速淬冷法制备的非晶态NiAl合金催化剂经活化后用于催化苯甲腈加氢制苄胺的反应，考察了溶剂种类、苯甲腈初始浓度、催化剂用量、反应温度及反应压力等因素的影响，并测定了该催化加氢反应的表观活化能。

The influence of reaction time, temperature, the acidity strength and amount of IL, on benzophenone yield were investigated.

考察了反应时间、温度、离子液体用量及Lewis酸性调变对反应的影响。

The synthesis of benzyl benzoate from sodium benzoate and benzyl chloride by phase transfer catalysis process is studied in the article.

由苯甲酸钠和氯化苄通过相转移催化法合成了苯甲酸苄酯，考察了几种季铵盐类相转移催化剂的亲核取代反应性能。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。