【摘要】 论述了采用精馏的方法可将C₄馏份中的DME（二甲醚）由原来的500ppm降至100ppm以下。通过汽液平衡试验,证明实测的DME-C₄体系的汽液平衡值与由UNIFAc方法计算的结果一致。运用该摸型,通过电子计算机程序计算确定,当精馏塔操作压力在5—15大气压时,进料温度为38.5—85.7℃,塔板数为9—14块。更多还原

【Abstract】 DME（dimethyl ether） in C₄ fraction can be reduced from original 500ppm to less than 100ppm with rectification method. A vapor-liquid equilibrium test has shown that the measured vapor-liquid equilibrium value of DME-C₄ system approximates the result calculated with the UNIFAC method. Using the UNIFAC model, we obtain a feed temperature of 38.5—85.7℃ and a column tray number of 9—14, when the operation pressure of the rectification column is 5—15atm.更多还原