查询词典 ethylate

Meanwhile the influence of the amount of catalyst alkali ethylate and absolute alcohol,the temperature and time of reaction on interesterification was studied.

利用正交试验研究了酯交换法制备卤虾油脂肪酸乙酯的工艺，分析了催化剂用量、反应温度、反应时间、无水乙醇用量等对醇解率的影响。

Influened the synthesis of ferrocene by the sodium ethylate method were researched in this paper.

研究了乙醇钠法合成二茂铁的影响因素：不同原料、原料配比、温度、时间、反应体系的氛围等，在选定的较优条件下，三茂铁的产率达到81.3％，并对二茂铁在柴油中的助燃、消烟作用进行了初步考察。

The ethylate tantalum film is characterized by FT-IR spectra, XRD and SEM, and the TaC coating is characterized by XRD and SEM.

用红外光谱、XRD及SEM分析和表征醇基钽膜，用XRD和SEM分析和表征TaC涂层。

The amorphous ethylate tantalum jellied is prepared and is spreaded out densely on the surface of C/C composite material to form a multi-films.

制备出的醇基钽是非晶态结构，在C/C复合材料上将这种凝胶铺展形成致密的多层膜。

The metal near the welding seam become sensitized because of the heat in welding process,the bad quality of the material and material change that contains some concentration of ethylate amine and Cl-are considered as the reasons for the corrosion of pipe.

同时由于处理的原料中含有较高浓度的Cl-以及混入了一定浓度的二乙醇胺，加剧了碱渣装置的管线腐蚀；提出了相应的防护措施。

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。

The optimun technological conditions were studied on the synthesis of 9-flourenylmethanal by the reaction of flouren and ethyl formate , and the synthesis of 9-flourenylmethanol by the reaction of 9-flourenylmethanal and methanal with sodium ethylate as catalyst.

研究了乙醇钠为催化剂，由芴与甲酸乙酯合成芴甲醛，再由芴甲醛与甲醛合成苯甲醇的工艺条件，结果表明：合成芴甲醛时，当芴为 16g时，催化剂乙醇钠 4 。

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。

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具体制备工艺为：首先以L-苯丙氨酸为原料采用重氮化方法得到-2-氯-3-苯基丙酸，再经酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇钠催化作用下和丙二酸二乙酯缩合，发生SN2反应，得到相应的三乙酯，然后经水解和脱羧，得到-苄基丁二酸；在实验中乙醇钠要和丙二酸二乙酯充分反应，避免生成肉桂酸乙酯；该过程操作简单，原料便宜，产率较高，总收率可达到26.8%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。