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- Unit_operation abstract "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, and other reactions. For example, in milk processing, homogenization, pasteurization, chilling, and packaging are each unit operations which are connected to create the overall process. A process may require many unit operations to obtain the desired product from the starting materials, or feedstocks.Historically, the different chemical industries were regarded as different industrial processes and with different principles. Arthur Dehon Little propounded the concept of "unit operations" to explain industrial chemistry processes in 1916. In 1923, William H.Walker, Warren K. Lewis and William H. 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 relevant chemical industries. The unit operations form the fundamental principles of chemical engineering. Chemical engineering unit operations consist of five classes:Fluid flow processes, including fluids transportation, filtration, and solids fluidization.Heat transfer processes, including evaporation, condensation, and heat exchange.Mass transfer processes, including gas absorption, distillation, extraction, adsorption, and drying.Thermodynamic processes, including gas liquefaction, and refrigeration.Mechanical processes, including solids transportation, crushing and pulverization, and screening and sieving.Chemical engineering unit operations also fall in the following categories which involve elements from more than one class: Combination (mixing) Separation (distillation, crystallization, chromatography) Reaction (chemical reaction)Furthermore, there are some unit operations which combine even these categories, such as reactive distillation and stirred tank reactors.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.".
- Unit_operation thumbnail LOC_MI0086_QuincyMine_TIF_00027aS.png?width=300.
- Unit_operation wikiPageID "1072236".
- Unit_operation wikiPageRevisionID "606351124".
- Unit_operation hasPhotoCollection Unit_operation.
- Unit_operation subject Category:Unit_operations.
- Unit_operation type Abstraction100002137.
- Unit_operation type Action114006945.
- Unit_operation type Attribute100024264.
- Unit_operation type Operation114008806.
- Unit_operation type State100024720.
- Unit_operation type UnitOperations.
- Unit_operation comment "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, and other reactions. For example, in milk processing, homogenization, pasteurization, chilling, and packaging are each unit operations which are connected to create the overall process.".
- Unit_operation label "Operaciones unitarias".
- Unit_operation label "Operazione unitaria".
- Unit_operation label "Operação unitária".
- Unit_operation label "Opération unitaire".
- Unit_operation label "Unit operation".
- Unit_operation label "Технологическая операция".
- Unit_operation label "عملية أساسية".
- Unit_operation label "单元操作".
- Unit_operation label "単位操作".
- Unit_operation sameAs Operaciones_unitarias.
- Unit_operation sameAs Oinarrizko_eragiketa.
- Unit_operation sameAs Opération_unitaire.
- Unit_operation sameAs Unit_operasi.
- Unit_operation sameAs Operazione_unitaria.
- Unit_operation sameAs 単位操作.
- Unit_operation sameAs Operação_unitária.
- Unit_operation sameAs m.043hqq.
- Unit_operation sameAs Q1816633.
- Unit_operation sameAs Q1816633.
- Unit_operation sameAs Unit_operation.
- Unit_operation wasDerivedFrom Unit_operation?oldid=606351124.
- Unit_operation depiction LOC_MI0086_QuincyMine_TIF_00027aS.png.
- Unit_operation isPrimaryTopicOf Unit_operation.
