anhydrous solvent

Nanocrystalline SnO_ ( 2) powders had been synthesized by the citrate-gel method using SnCl_ ( 2) and citric acid as precursors and anhydrous ethanol as solvent.

以SnCl2和柠檬酸为前驱物，无水乙醇为溶剂制备了纳米级SnO2。

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It turns out that experiment result with anhydrous pyridine as solvent is closer to weightlessness method. So it is better to determine the water in erythromycin with anhydrous pyridine solvent.

结果表明，以无水吡啶为溶剂测定的结果更接近干燥失重法的测定结果，在测定红霉素碱的水分时，以选择无水吡啶为宜。

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Usually, this type of reaction is performed in anhydrous organic solvent.

通常，这类反应是在无水的有机溶剂中进行。

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The Ni/ Al_2O_3, Ni/ La-Al_2O_3, Ni/ MgO and Ni/ TiO_2 catalysts were synthesized by the impregnation method with the anhydrous ethanol as the solvent. Their catalytic activities towards the NH_3 decomposition reaction were evaluated in a continuous-flow reactor under the atmospheric pressure.

选用无水乙醇为溶剂，采用浸渍法制备了纳米结构的Ni/Al2O3、Ni/La-Al2O3、Ni/MgO和Ni/TiO2催化剂，并在常压连续微反装置上分别对其氨分解反应活性进行评价。

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By using anhydrous ethanol as solvent, the adsorption equilibrium of tocopherols and tocotrienols in methyl esterification products on modified adsorption resin was determined by static method.

选用合适吸附树脂，以无水乙醇为溶剂，用静态吸附法测定了脱臭馏出物的甲酯化物中的混合生育酚在改性吸附树脂上的吸附等温线。对吸附特性做了初步探索。

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The titration of water is usually carried out with the use of anhydrous methanol as the solvent for the test specimen;

水分的滴定通常是用无水甲醇作待测物质的溶剂来完成的。

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The butyl stearate/ bentonite composite PCM was prepared by a liquid intercalation method using anhydrous ethanol as a solvent.

以无水乙醇为溶剂，采用液相插层法制备出了硬脂酸丁酯/膨润土复合材料。

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In the meanwhile, the effects of varied acids for protecting third carbonyl group were investigated. Through the trial and error, the mixture of anhydrous alcohol/ petroleum benzine is the good solvent of target molecule recrystal.

考察了酸性对保护3位羰基的影响，确定了无水乙醇/石油醚是目标分子重结晶的最佳溶剂体系。

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We used the anhydrous benzene as solvent, and made use of ( PPh3) PBr2 as halo-substituted reagent ( the bromine was added drop wise into the system), and selectively obtained the product 2-butyne-1,4-dibromo.

我们用无水苯为反应溶剂，以温和的（PPh3）PBr2作为卤代试剂（冰浴下液溴逐滴滴入PPh3苯溶剂中当场生成）卤化2-丁炔-1,4-二醇，选择性合成得到2-丁炔-1,4-二溴衍生物。

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The solvent effect of anhydrous acetic acid was described in detail.

详细的分析了冰醋酸在重氮化反应中的溶剂效应。

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Method on extraction and purification of tea saponin by using anhydrous alcohol as solvent and cholesterol as purifying agent was reported.

以无水乙醇为提取剂并采用改进的胆甾醇纯化法，得到了精制茶皂素。

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Sodium cyanate was prepared from reactants& urea and anhydrous sodium carbonate through liquid-solid chemical reaction method, in the solvent of N, N-dimethlformamide ( DMF).

使用液固化学反应法，以尿素和无水碳酸钠为原料，在N，N-二甲基甲酰胺（DMF）溶剂的反应介质中，制备了氰酸钠产品。

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Target compounds have been synthesized by condensation of the amino heterocycle with isocyanates in absolutely anhydrous and aprotic solvent.

利用异氰酸酯与氨基杂环化合物在无水非质子溶剂中发生亲核加成反应，制得目标化合物。

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Diethyl phosphite was continuously synthesized from phosphorus trichloride and anhydrous alcohol without any solvent in a special glass apparatus.

在特制的玻璃仪器内，三氯化磷与无水乙醇于无溶剂的条件下连续合成了亚磷酸二乙酯。

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Anhydrous alcohol and glacial acetic acid were used as component solvent, which the volume ratio was 2 ∶ 1, zinc dust as reductant, reaction temperature was 25~ 35 ℃, reaction time was 2 h, the yield was 81%.

在还原反应中采用无水乙醇和冰醋酸的混和溶剂，两种溶剂的体积比为2∶1，以锌粉为还原剂，反应温度为25~35℃，反应时间为2h，产率为81%。

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The control group is water. The main results are as follows: 1. Using anhydrous ethanol as a solvent for extraction process optimization. Conclusion: ultrasonic wave extraction method soaking extraction method cold-soaked extraction method. 2.

其主要结果如下：1、以无水乙醇为溶剂进行提取方法比较，实验得出：超生波提取法效果温浸提取法效果冷浸提取法效果。

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