Unit processes

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Related to Unit processes: Unit operations

Unit processes

Processes that involve making chemical changes to materials, as a result of chemical reaction taking place. For instance, in the combustion of coal, the entering and leaving materials differ from each other chemically: coal and air enter, and flue gases and residues leave the combustion chamber. Combustion is therefore a unit process. Unit processes are also referred to as chemical conversions.

Together with unit operations (physical conversions), unit processes (chemical conversions) form the basic building blocks of a chemical manufacturing process. Most chemical processes consist of a combination of various unit operations and unit processes.

The basic tools of the chemical engineer for the design, study, or improvement of a unit process are the mass balance, the energy balance, kinetic rate of reaction, and position of equilibrium (the last is included only if the reaction does not go to completion). See Chemical engineering, Unit operations

References in periodicals archive ?
Development of an LCI application protocol for the NREL automotive paint reference dataset involved scoping the quantitative analysis to LCI materials used in the E-coat and topcoat unit processes.
This does not mean that there are no opportunities within unit processes.
The lubricants unit processes heavy oils (paraffin-based) imported to produce lubricating oils, bitumen, asphalt, sulphur, waxes and greases.
The LG-Caltex SCANfining unit processes 20,000 barrels per day of catalytic naphtha.
The new pilot plant is capable of automatic, fully integrated, continuous operation of all unit processes, from feed preparation to production of final metal products.
The sand reclamation unit processes from 8000-9000 tons of sand per year.
Unfortunately, studies show that most noticeable odors from a treatment plant are often a blend of odors from many unit processes.
The unit processes available include solvent extraction and desolventizing, neutralizing/washing/bleaching, hydrogenation and deodorizing.
The unit processes multiple rolls simultaneously and random loading allows addition of a second or third film roll after processing is underway.