An ore extraction process broken into its constituent unit operations (Quincy Mine, Hancock, MI ca. The Quincy Mine is an extensive set of Copper mines located near Hancock Michigan. Hancock is a City in Houghton County. It is the northernmost city in the U 1900)

In chemical engineering and related fields, a unit operation is a basic step in a process. Chemical engineering is the branch of Engineering that deals with the application of Physical science (e For example in milk processing, homogenization, pasteurization, chilling, and packaging are each unit operations which are connected to create the overall process. Homogenization (or homogenisation) is a term used in many fields such as Chemistry, Agricultural science, Food technology, Sociology Pasteurization is the process of heating Liquids for the purpose of destroying bacteria, Protozoa, Molds and Yeasts The process was Packaging is the science art and technology of enclosing or protecting products for distribution storage sale and use A process may have many unit operations to obtain the desired product.

Historically, the different chemical industries were regarded as different industrial processes and with different principles. In 1923 William H. Year 1923 ( MCMXXIII) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar. Walker, Warren K. Lewis and William H. Warren Kendall Lewis ( 21 August 1882 - 9 March 1975) was an MIT professor who has been called the father of modern Chemical engineering McAdams wrote the book The Principles of Chemical Engineering and explained the variety of chemical industries have processes which follow the same physical laws. They summed-up these similar processes into unit operations. Each unit operation follows the same physical laws and may be used in all chemical industries. The unit operations form the fundamental principles of chemical engineering.

Chemical engineering unit operations consist of five classes:

1. Fluid flow processes, including fluids transportation, filtration, solids fluidization
2. Heat transfer processes, including evaporation, condensation
3. Mass transfer processes, including gas absorption, distillation, extraction, adsorption, drying
4. Thermodynamic processes, including gas liquefaction, refrigeration
5. Mechanical processes, including solids transportation, crushing and pulverization, screening and sieving

Chemical engineering unit operations also fall in the following categories:

• Combination (mixing)
• Separation (distillation)
• Reaction (chemical reaction)

Chemical engineering unit operations and chemical engineering unit processing form the main principles of all kinds of chemical industries and are the foundation of designs of chemical plants, factories, and equipment used. Filtration is a mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases by interposing a medium to fluid flow through which the fluid In thermal physics, heat transfer is the passage of Thermal energy from a hot to a colder body Evaporation is the process by which Molecules in a Liquid state (e Condensation is the change of the physical state of aggregation (or simply state of matter from gaseous phase into liquid phase Mass transfer is the phrase commonly used in engineering for physical processes that involve molecular and convective transport of Atoms and Molecules Distillation is a method of separating Mixtures based on differences in their volatilities in a boiling liquid mixture The related terms resource extraction and resource extraction industry both refer to the practice of locating acquiring and selling any resource but typically a Natural Adsorption is a process that occurs when a gas or liquid Solute accumulates on the surface of a solid or a liquid (adsorbent forming a film of molecules or atoms (the Drying is a Mass transfer process resulting in the removal of water Moisture or moisture from another Solvent, by Evaporation from a Solid Liquefaction of gases includes a number of phases used to convert a Gas into a Liquid state Refrigeration is the process of removing Heat from an enclosed space or from a substance and moving it to a place where it is unobjectionable MIX is a hypothetical computer used in Donald Knuth &rsquos monograph The Art of Computer Programming ( TAOCP) Distillation is a method of separating Mixtures based on differences in their volatilities in a boiling liquid mixture A chemical reaction is a process that always results in the interconversion of Chemical substances The substance or substances initially involved in a chemical reaction are called Unit processing is the basic processing in Chemical engineering.

See also

• Distillation Design
• Transport Phenomena
• Unit Operations of Chemical Engineering