Dortmund Data Bank

Azeotropic Data

The experimental data shown in these pages are freely available and have been published already in the DDB Explorer Edition. The data represent a small sub list of all available data in the Dortmund Data Bank. For more data or any further information please search the DDB or contact DDBST.


No. Formula Molar Mass CAS Registry Number Name
1 C2H4O2 60.053 64-19-7 Acetic acid
2 C5H9NO 99.133 872-50-4 N-Methyl-2-pyrrolidone
Search the DDB for all data of this mixture

Data Table

Azeotropic Type T [K] P [kPa] yaz,1 [mol/mol] yaz,2 [mol/mol] Measurement Method Evaluation Source
none n.a. 26.670 n.a. n.a. Phase equilibrium Author from VLE 2
none n.a. 101.330 n.a. n.a. Phase equilibrium DDBST from VLE 1

(yaz - vapor and liquid mole fraction)

List of Azeotrope Types

none zeotropic

List of References

1 Chang W.; Wan H.; Guan G.; Yao H.: Isobaric Vapor-Liquid Equilibria for Water + Acetic Acid + (N-Methyl Pyrrolidone or n-Methyl Acetamide). Fluid Phase Equilib. 242 (2006) 204-209
2 Ping L.-J.; Peng Y.; Mao J.-W.: Vapor-Liquid Equilibria of Acetic Acid-Water-N-Methylpyrrolidone System at 26.67 kPa. Gaoxiao-huaxue-gongcheng-xuebao 25 (2011) 554-557

Azeotropic Data Overview