含盐异丙醇溶液饱和蒸汽压的测定和关联

CIESC Journal

含盐异丙醇溶液饱和蒸汽压的测定和关联

鲍祁,崔志娱,高大泉,李竞庆,吕成章,项婷

天津大学化学系,天津大学化学系,天津大学化学系,天津大学化学系,天津大学化学系,天津大学化学系天津 ,天津 ,天津 ,天津 ,天津 ,天津

出版日期:1990-06-25 发布日期:1990-06-25

Determination and Correlation for Vapor Pressure of Salt-Containing 2-Propanol Solution

Bao Qi, Cui Zhiyu, Gao Daquan, Li Jingqing, Lu Chengzhang and Xiang Ting (Department of Chemistry, Tianjin University, Tianjin)

Online:1990-06-25 Published:1990-06-25

摘要/Abstract

摘要： <正>为了考察电解质-盐类对汽液平衡的影响,研究挥发性溶剂在不同盐浓度下的饱和蒸汽压与温度的关系,对于理论上了解盐效应的机理,实践中用于恒沸混合物的加盐精馏、有机生物物料的制取分离等都是很有意义的.由丙烯水合制异丙醇的传统过程是得到异丙醇和水的恒沸物,而后再加入第三组分进行特殊精馏,便可得到无水异丙醇.近年来人们试探改革这一传统过程,运用加盐萃取精馏.这是因为盐效应可较大地改变各组分的相对挥发度,以致消除恒沸.由于氯化锌较其他盐(如CaCl_2)在异丙醇中有较大的溶解度,并有较大的溶解速率,因此研究ZnCl_2-异丙醇溶液的饱和蒸汽压是有现实意义的.

Abstract: The vapor pressure of a solution of 2-propanol-zinc chloride at different salt concentrations was determined by using boiling point method. The temperature range of the experiment was from 23 to 92℃ and the pressure range was from 4.0 to 103.0 kPa. The concentration of salt (ZnCl2) reached 30%(wt). The total number of experiment point was 297. The correlation equati ons and their fit parameters were obtained. The relative mean deviation of the calculated and experimental vapor pressure values was ±0.3%. Therefore, the correlation equation are applicable for predicting the vapor pressure of this system in any concentration and temperature within the range of the experimental conditions.

鲍祁,崔志娱,高大泉,李竞庆,吕成章,项婷. 含盐异丙醇溶液饱和蒸汽压的测定和关联 [J]. CIESC Journal.

Bao Qi, Cui Zhiyu, Gao Daquan, Li Jingqing, Lu Chengzhang and Xiang Ting (Department of Chemistry, Tianjin University, Tianjin). Determination and Correlation for Vapor Pressure of Salt-Containing 2-Propanol Solution[J]. .