查询词典 synthesis method

A synthesis method of 2-(2'-hydroxyl-4'-benzoyloxy-phenyl)-2H-benzotriazole and derivatives thereof is provided, and is characterized in that 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and benzoyl chloride are taken as raw materials for reaction in solvent for 1-8 hours under the temperature of 50-140 DEC C with the mole ratio of 1 to 0.95-1.1, wherein, the amount of the solvent is 2 to 20 times that of the 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and X represents H, F, Cl, Br.

一种2-(2′-羟基-4′-苯甲酸基苯基)-2H-苯并三唑及其衍生物的合成方法，其特征是，以2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑和苯甲酰氯为原料，在溶剂中进行反应，反应温度50℃～140℃，反应时间1～8小时，反应原料摩尔比2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑∶苯甲酰氯为1∶0.95～1.1，溶剂用量为2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑重量的2～20倍，其中X代表H、F、Cl、Br，具有反应条件温和、反应收率高和产物纯度高的特点。

The results show that the TiB2-Al2O3 composite powders could be obtained by combustion synthesis method between 420℃~700℃.

结果表明，用燃烧合成法在420℃~700℃之间可制得TiB2-Al2O3陶瓷复合粉体。

Nanocrystalline ZnO was prepared by the combustion synthesis method for the first time.

首次以硝酸锌和甘氨酸为原料，用燃烧合成法制备了纳米ZnO粉体。

We use a special R L C synthesis method for transfer function based on the real part decomposition technique to set up the high frequency circuit model for instrument transformer.

提出了基于阻抗和导纳的实部分解技术的互感器无源电路的实现方法，并建立了一台110 kV电压互感器的高频电路模型。

Iron oxide Nanocrystalline Powders were prepared respectively by precipitation, stearic acid gel, polyethylene glycol gel, citrate gel and iron citrate combustion. The influence of synthesis method on the final product, such as the crystal structure, crystalline grain size, dispersivity were studied.

分别采用沉淀法、硬脂酸法、聚乙二醇法、柠檬酸法和柠檬酸铁快速燃烧法制备纳米氧化铁晶体，研究了这 5种制备方法对粉体晶型、平均粒径、磁性、分散性的影响。

The study of the synthesis method for this kind of linkages is of practical significance.

对其轨迹再现的研究更具实用意义。

By use of the Benfield-Hurda modal synthesis method, the structural model of mistuning blade-disk assemblies is established.

用Benfield—Hurda的混合型模态综合法，给出了非谐调叶盘的特征解方程。

Triazines were synthesized by "two-component synthesis" method, namely, by the reaction of alkylbiguanide sulphates and carbonyl compounds in the presence of H2SO4 as a catalyst.

用&两组份&合成方法即由烷基双胍硫酸盐和羰基化合物在浓硫酸的催化下合成了三嗪类化合物。

Using phosphorus trichloride as the base raw material, we try out the water dosage on hydrolysts, drop quomodo of phosphorus trichloride, the ratio of phosphorus trichloride and MSIDA, other trial operate, and find out the best synthesis method.

我国自上世纪70年代开始草甘膦的合成工艺研究，根据化工行业所能提供的原料，在不同的时期，研究开发了不同的合成工艺[3]。

Using phosphorus trichloride as the base raw material, we try out the water dosage on hydrolysts, drop quomodo of phosphorus trichloride, the ratio of phosphorus trichloride and MSIDA, other trial operate, and find out the best synthesis method.

用三氯化磷为基本原料，研究了水解用水量、三氯化磷滴加方式、三氯化磷与亚氨基二乙酸一钠盐的配比和工艺操作条件等因素的影响情况。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失