Unit process
Encyclopedia
A Unit Process is a step in manufacturing in which chemical reaction takes place, e.g, the oxidation of paraxylene to terephthalic acid
Terephthalic acid
Terephthalic acid is the organic compound with formula C6H42. This colourless solid is a commodity chemical, used principally as a precursor to the polyester PET, used to make clothing and plastic bottles. Several billion kilograms are produced annually...

 is a unit process, the hydrogenation
Hydrogenation
Hydrogenation, to treat with hydrogen, also a form of chemical reduction, is a chemical reaction between molecular hydrogen and another compound or element, usually in the presence of a catalyst. The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically...

 of vegetable oil to ghee
Ghee
Ghee is a class of clarified butter that originated in South Asia and is commonly used in South Asian cuisine....

is a unit process. In 1930 P.H. Groggins introduced Unit processes in order to classify and standardize chemical reactions.
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