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Course Detail

Course Name Equilibrium Staged Operations
Course Code 15CHE312
Program B. Tech. in Chemical Engineering
Semester Six
Year Taught 2019


Unit 1

Design of mass transfer equipment based on the concept of equilibrium stage;

Distillation: vapor-liquid equilibria, Raoults law and deviations from ideality, methods of distillation; Equilibrium and operating line concepts; Design calculations by McCabeThiele and Ponchon-Savarit methods; Continuous contact distillation (packed tower) design; Extractive and azeotropic distillation, low pressure distillation; Steam distillation; Tray tower equipment.

Unit 2

Absorption: Design of tray tower absorbers; Operating characteristics of stagewise and differential contactors; Design calculations for single stage, multistage concurrent and countercurrent absorbers.

Liquid-liquid extraction: Equilibrium in ternary systems; Design calculations for batch and continuous extractors, equipment – spray, packed and mechanically agitated contactors; Pulsed extractors, centrifugal extractors.

Unit 3

Leaching: Solid-liquid equilibria; Equipment – batch and continuous types; Calculation of number of stages.

Adsorption and Ion exchange: Theories of adsorption of gases and liquids; Principle of ion exchange; Equipment for batch and continuous operation; Design calculations for adsorption and for ion exchange resins.

Miscellaneous separation processes: Introduction to membrane separation process; Solid and liquid membranes; Reverse osmosis; Electrodialysis.

Text Books

  1. R. E. Treybal, Mass Transfer Operations, 3rd Edition, McGraw Hill, 1981.
  2. J. D. Seader and E. J. Henley, Separation Process Principles, 2nd Edition, Wiley, 2005.


  • J. M. Coulson and J. F. Richardson, “Chemical Engineering Vol. II”, 4th Edition, Asian Books Pvt. Ltd, India, 1998.
  • W. L. McCabe, J. C. Smith and P. Harriot, “Unit operations of Chemical Engineering”, 6th Edition, McGraw Hill, International Edition, 2001.

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