溶剂

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。

There are two main types of Evening Primrose oil, one is extracted using chemical solvents, whilst the other is extracted by mechanically pressing the oil from the seeds.

主要有两种类型的月见草油，是使用化学溶剂提取，而另一种是提取石油机械紧迫的种子。

The results showed that the proper organic solvent and extractant were sulfonated kerosene and trialkyl phosphine oxide.

结果表明，较合适的溶剂和萃取剂分别为磺化煤油和三烷基氧膦。

A better extractant, polyethylene glycol 400, was selected.

选出了一种脱硫效果较好的溶剂——聚乙二醇400(PEG-400)。

Based on single-factor experiments, orthogonal experiments were performed to optimize the extractive conditions.

在单因素实验的基础上，设计了的正交实验来确定溶剂提取大豆异黄酮的最佳工艺条件。

Solvent selection is the key problem for extractive distillation.

溶剂的选择是萃取精馏的核心。

The solvent selection and batch extractive distillation with a middle vessel were studied by theoretical analysis and experiment.

本文通过理论分析和实验相结合的方法，主要研究了萃取精馏溶剂的选择以及带有中间储罐塔的间歇萃取精馏过程的操作性能和设计计算问题。

The method is realized by that polyether ether ketone is added into concentrated sulfuric acid to carry out sulfonation reaction, thereby obtaining sulfonated polyether ether ketone, then the sulfonated polyether ether ketone is dissolved in organic solvent, N, N (1)-Carbonyldiimidazole is added to stir for one to three hours, coupling agent is mixed for stirring the reaction for 1.5 to 4 hours, then inorganic crosslinking agent is mixed to react under the temperature of 50 to 80 DEG C. Proton conductors are mixed to continue getting the mixed solution of the sulfonated polyether ether ketone or the inorganic crosslinking agent or proton conductors under the temperature. Finally the proton exchange membrane for a direct methanol fuel cell is obtained by that the mixed solution of the sulfonated polyether ether ketone or the inorganic crosslinking agent or proton conductors is/are processed through membrane forming, drying and exuviation.

该方法首先将聚醚醚酮加入浓硫酸中进行磺化反应得到磺化聚醚醚酮；然后将磺化聚醚醚酮溶于有机溶剂中，加入N，N′-羰基二咪唑搅拌1～3小时后加入偶联剂搅拌反应1.5～4小时，再加入无机交联剂在50～80℃下反应，然后加入质子导体继续在此温度下反应得到磺化聚醚醚酮/无机交联剂/质子导体的混合溶液；最后将磺化聚醚醚酮/无机交联剂/质子导体的混合物溶液成膜，干燥，脱膜即得到所述的直接甲醇燃料电池用质子交换膜。

These polymers showed good solubility in common organic solvents, and the solid films of them can be facilely obtained by solution processing.

这三种聚合物在常用的有机溶剂中具有很好的溶解性，可通过溶液加工的方式制备聚合物薄膜。

A full factorial experiment method and a second-order orthogonal design were used in the study.

研究内容主要包括： 1、以膏状大豆磷脂为原料，用丙酮为溶剂制备了粉状磷脂。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了