The azeotropic temperature of tetrahydrofuran ( THF) and water changes with the pressure, based on this characteristic a purification process of pressurized column and atmospheric column was established. 利用四氢呋喃(THF)溶液的共沸点随压力改变的特性,提出加压塔-常压塔双塔提纯工艺。
In addition, the parameters under the azeotropic state such as temperature, pressure and composition were calculated. 同时对恒沸状态的温度、压力及组成等参数亦进行了相关计算。
The results showed that the relative volatility of ethanol-water azeotropic mixture increased obviously as solvent ratio increased and the slop cut of water-glycol lasted a very short time during which the temperature at the top of the column rose sharply. 实验得出,乙醇水体系的相对挥发度随溶剂比的增加而显著增大,水乙二醇过渡馏分段持续时间很短,在该段时间会出现塔顶温度急剧跃升的现象;
Azeotropic composition versus azeotropic temperature, and logarithm of system pressure versus reciprocal of azeotropic temperature were both distinctly linear. The calculated values were in good agreement with the experimental value. 由关联结果可知,其共沸组成与共沸温度、压力的对数与共沸温度的倒数均呈良好的线性关系,计算结果与实验值符合良好。
New azeotropic/ azeotropic-like refrigerants used in lower temperature stage of cascade refrigeration system 用于复叠式制冷循环低温级的新系列共沸/近共沸工质
The azeotropic temperature and compositions of the trioxane-water system under atmospheric pressure were also predicted. 用模型参数推算了常压下水三聚甲醛系统的共沸组成和共沸温度。