查询词典 ethanol

Coking and deactivation of zeolite catalysts in the synthesis of propylene glycol ethyl ether from propylene oxide and ethanol at lower reaction temperature were studied in this thesis.

本文选择反应物与生成物都含有氧原子的自环氧丙烷和乙醇合成丙二醇乙醚作为典型反应，研究较低温度下在沸石催化剂上反应过程中的的积炭失活规律。

Naphthol ethyl ether was sythesized with the ethanol and β-naphthol as materials and aluminium sulfate as catalyst.

介绍了以乙醇和β-萘酚为原料，在硫酸铝Al2(SO43.18H2O催化下合成β-萘乙醚的方法，讨论了反应时间，催化剂用量以及反应物摩尔比对合成的影响，确定了最佳反应条件。

Methods The cultivated Cs fungus HK-1 and natural Cs were extracted with petroleum ether, ethyl acetate, ethanol, and water.

方法人工虫草菌HK-1与天然虫草分别用石油醚、醋酸乙酯、乙醇和水提取。

Reaction of Ni[(C4H9O)2PS2]2 with ethylamine, n-propylamine, n-butylamine, and n-amylamine have been studied by spectrophotometry in ethanol at 30℃.

用光谱法研究了NiL2在30℃时与乙胺、正丙胺、正丁胺和正戊胺在乙醇溶液中的加合反应。

Adsorption heat of ethylamine, n-pentane and ethanol on FAU zeolite

乙胺、正戊烷、乙醇在 FAU型沸石上的吸附热

Optimized conditions are as follows:using ethanol solution of sodium ethylate as catalyst, themole ratio of ester to ketone is 1.2:1; the temperature is 90℃; the dosage of solvent is 10mLwith reaction time 5h.

通过正交试验得到了优化实验条件：以乙醇钠的乙醇溶液为催化剂，酯酮摩尔比为1.2：1，反应温度90℃，溶剂用量10mL，反应时间5小时。

The process of diethyl carbonate synthesis by transesterification reaction of ethanol with ethylene carbonate,coproducing useful ethylene glycol was investigated using catalyst of sodium ethylate .

研究了以乙醇钠为均相催化剂，碳酸乙烯酯和乙醇酯交换合成碳酸二乙酯同时联产乙二醇的过程。

From 3-chloropropene bycondensation with sodium ethylate in ethanol to form 3-ethoxypropene followed by anti-Markovnikov addition with HBr inthe presence of benzoyl peroxide.

3-氯丙烯与乙醇钠在乙醇中回流制得3-乙氧基丙烯，继而在过氧苯甲酰存在下，与溴化氢经反马氏加成制得1-溴-3-乙氧基丙烷，总收率89。

Catalytic dehydration of ethanol to ethylene was studied in this thesis.

本文对乙醇催化脱水制乙烯反应进行了研究。

Result The optimum exaction technology conditions were as follows: 60% ethanol, solid-liquid ratio of 1:20, soaking for 24 h and ultrasonic time of 30 min.

结果］最佳提取工艺为60%的乙醇，固液比1：20，浸泡24 h，超声时间30 min。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。