查询词典 azeotropes

It is a classical chemical process for production of methyl acetate. But by the limits of. the formation of azeotropes in the process,we can't obtain hign purity methyl acetate by normal unit operation.

醋酸甲酯的制备是一种经典的化学过程，但由于反应过程中形成共沸物的限制，通过常规的单元操作不能够得到高纯度的醋酸甲酯。

It is a classical chemical process for production of methyl acetate. But by the limits of. the formation of azeotropes in the process, we cant obtain hign purity methyl acetate by normal unit operation.

醋酸甲酯的制备是一种经典的化学过程，但由于反应过程中形成共沸物的限制，通过常规的单元操作不能够得到高纯度的醋酸甲酯。

The activity coefficients presented in Tables 4 and 5 indicate that the dipropyl ether (1)+ 2-ethoxyethanol (3) system shows positive deviations from ideal behaviour and that the 1-propyl alcohol (2)+ 2-ethoxyethanol (3) system exhibits no deviation from ideal behaviour and no additional azeotropes are present.

表4和表5所示的活度系数表明，&二丙醚+2-乙氧基乙醇&体系与理想模型表现出正偏差而&1-丙醇+2-乙氧基乙醇&体系则无偏差，并且不存在其他共沸物。

Pervaporation can also be used to separate organic solution, break azeotropes and dehydrate solvents, which are difficult to do through distillation or other means.

过蒸汽化也可以被用于分离有机溶液，破坏共沸混合物和脱水溶剂，而这些通过蒸馏或者其他方法很难完成的。

He two-column process simulation is performed,and the calculation method , which may be ref- erenced in engineering design,for separation process of binary heterogeneous azeotropes is proposed.

对双塔流程进行了模拟，提出了二元非均相共沸物分离过程的模拟计算方法，可供工程计算参考。

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。