摘要
采用化工流程模拟软件PRO/Ⅱ对常压下碳酸二甲酯(DMC)-甲醇汽液平衡数据进行关联,考虑最低共沸点和甲醇沸点间汽液平衡数据的权重关系,回归得到了NRTL模型的二元交互参数,模型的计算值与实验值吻合较好,甲醇气相组成的平均相对偏差为0.13%,温度的平均相对偏差为0.04%。提出了氨-甲醇体系汽液平衡的研究在尿素醇解法制备DMC分离工艺中的重要性,对文献报道的氨-甲醇汽液平衡数据进行关联,得到了Wilson模型的二元交互作用参数,所得参数可在较宽温度和压力范围内使用。对碳酸二甲酯-甲醇体系、氨-甲醇体系所建立的模型可靠,可为工业生产提供理论指导。
Reported vapor-liquid equilibrium data of dimethyl carbonate-methanol（DMC-MeOH） under normal pressure were correlated using the chemical process simulation software PRO/Ⅱ. Based on the relationship between the lowest azeotropic point and boiling point of methanol, binary interaction parameters of the NRTL thermodynamic model were obtained by regression and the results were in agreement with experimental data. The correlated results showed that the average relative deviation of methanol vapor phase composition was 0.13%, and the average relative deviation of temperature was 0.04%. The importance of the vapor-liquid equilibrium data of ammoniamethanol（NH3-MeOH） in the separation process of DMC synthesized by the urea alcoholysis was proposed. Reported vapor-liquid equilibrium data of NH3-MeOH system were correlated and the obtained binary interaction parameters for the Wilson thermodynamic model could be applied in the wide ranges of temperature and pressure.
出处
《石油化工》
CAS
CSCD
北大核心
2014年第5期523-529,共7页
Petrochemical Technology
关键词
碳酸二甲酯
甲醇
氨
共沸物
汽液平衡
流程模拟
PRO
Ⅱ软件
dimethyl carbonate
methanol
ammonia
azeotrope
vapor-liquid equilibrium
process simulation
PRO/Ⅱ software
