What is the Unit Operation and Unit Process? (OR) Explain Unit Operation and Unit Process? (OR) Write Short Notes On Unit Operation and Unit Process? A. Unit Operation: In Chemical Engineering and related fields a Unit Operation is a basic step in a process. Unit Operations involve a physical change or chemical transformation such as Separation, Crystallization, Evaporation, Filtration, Polymerization, Isomerization, Desulfurization, Distillation & other reactions. E.g. Milk processing, Homogenization, Pasteurization, Chilling & Packaging are each unit operations which are connected to create the overall process. B. Unit Process: A Unit Process is one or more grouped operations in a manufacturing system that can defined and separated from others. Unit Process involves chemical changes such as Hydrogenation, Oxidation, Nitration & other reactions. 1. 2. 3. 4.
Unit operations are reversible and Unit process is irreversible. Unit operations involve physical changes while unit process involve chemical changes. Unit operation is just primary activity while unit process is secondary activity. Unit Operations involve a physical change or chemical transformation such as Separation, Crystallization, Evaporation, Filtration, Polymerization, Isomerization, Desulfurization, Distillation & other reactions. While Unit Process involve a chemical changes such as Hydrogenation, Oxidation, Nitration & other reactions. Difference between Unit Operation and Unit Process:
S. No.
Unit Operation
Unit Process
1.
Unit Operations are reversible.
2.
Unit
3.
changes. Unit Operation is just primary activity.
Unit Process is just secondary activity.
4.
Unit
physical
Unit Process involve a chemical changes
change or chemical transformation such
such as Hydrogenation, Oxidation, Nitration &
as
other reactions.
Operations
Operations
involve
involve
Separation,
a
Unit Process is irreversible. physical
Crystallization,
Evaporation, Filtration, Polymerization, Isomerization, Desulfurization, Distillation & other reactions.
Unit Process involve chemical changes.