a single/double column:

Based on his air liquefaction principle Carl von Linde constructed the first air separation plant for oxygen production in 1902, using a single column rectification system.
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In 1910, he set the basis for the cryogenic air separation principle with the …

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Unit operations


A structure of logic used for synthesizing and analyzing processing schemes in the chemical and allied industries, in which the basic underlying concept is that all processing schemes can be composed from and decomposed into a series of individual, or unit, steps. If a step involves a chemical change, it is called a unit process; if physical change, a unit operation. …

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