萃取剂

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

There is a good market for betaine,So its synthetic method and purification have captured people's attention.

在介绍甜菜碱市场现状，发展前景及传统生产方法的基础上，重点论述了萃取结晶法生产甜菜碱的原理、特点、萃取剂的选择等，证明萃取结晶法提纯甜菜碱是可行的。

Resulting the extraction technology of artificial culturing biofilms, the hydroxylamine hydrochloride (NH2OH·HCl) was selected to extract manganese oxides, and sodium dithionite (Na2S2O4) was used to separate manganese oxides and iron oxides.

参考人工培养生物膜的萃取方法，分别用NH2OH·HCl和Na2S2O4为萃取剂选择性萃取生物膜上的锰氧化物和铁、锰氧化物。

The influence of the concentration of the extractant PSO3e and medium HCl on the extraction rate of Au3+ was studied in this paper.

研究了石油亚砜PSO3e萃取Au3+时，萃取剂浓度、盐酸浓度对萃取率的影响。

It indicates that TBOPDA has better hydrolysis stability. At 50 ℃,when the acidity is 1 mol/L HNO_3, the effects of hydrolysis on distribution ratio are unchanged, when the acidity is 5 mol/L, the changes of distribution ratio are about 37%.

研究结果表明，该萃取剂在水溶液中具有较高的稳定性，当酸度为1mol/L，温度达到50℃时，铀的萃取性能没有变化；当酸度提高到5mol/L时，50℃条件下，铀的萃取分配比下降约37%。

In this paper,water-soluble ionic liquid BeS was used as extractant for sulfur compounds thiophene,2-methyl thiophene,benzothiophene,dibenzothiophene in simulated fuel and the feasible operation conditions were confirmed by extraction experiments.

选择水溶性的离子液体BeS作萃取剂，对模拟油品中的4种含硫有机物噻吩、2-甲基噻吩、苯并噻吩、二苯并噻吩进行了萃取，确定了适宜的萃取操作条件。

The experimental results are as follows:(1) TBP was suitable to monobasic carboxylic acid solutes , but was not suitable to polybasic carboxylic acid solutes (such as succinic acid and citric acid).

首次采用BP神经网络分析方法预测了不同操作条件下的络合萃取分配系数，最终获得有工业化应用价值的络合萃取剂以及络合萃取技术处理有机羧酸稀溶液的工艺条件。

Was obtained by extracting technology in system of RECl_3-HCl with naphthenic acid- sulphoxide -kerosene and naphtehnic-isooctanol-kerosene asextractants.

阐述了以环烷酸-异辛醇-煤油和环烷酸-亚砜-煤油两种组成不同的有机溶液为萃取剂，在RE-Cl3-HCl体系中制取纯度大于99.999%Y2O3的工艺及萃取分离过程中萃取槽体平衡时稀土分布的情况。

By adding back-extractant into the extraction solution, two suspended substances are highly enriched to form two solids: ultra-pure coal and caking components. The coal inbuilt state model and its conception are proposed.

通过向CS2/NMP混合溶剂萃取液中添加反萃取剂的反萃取过程，可以将2种类型的悬浮物高度富集形成固体形态的精煤和黏结组分。

Extractive distillation and liquid-liquid extraction are effective separation processes to deal with the separation of close boiling compounds or azeotropes systems. The selection of appropriate solvents is the key.

化工生产中常遇到欲分离组分之间的相对挥发度接近1或形成共沸物的难分离物系，萃取精馏和液液萃取是常用且有效的方法，其中萃取剂的选择是关键。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。