Azeotrope

Azeotropes are the mixtures of liquids which boil at a constant temperature. Azeotropes may be called constant boiling point mixtures or azeotropic mixtures.Moore, Walter J. 1962. Physical chemistry. 3rd ed Prentice-Hall, p140–142.

Their proportions cannot be altered by simple distillation.

Types
Azeotropes are classified into two types
Minimum boiling azeotrope
Maximum boiling azeotrope

 References 

Category:Chemical processes
Category:Thermodynamics