Preliminaries Regarding General Modeling of the Cryogenic Distillation with Application to (13C) Iso-tope Separation

There are many domains of life, techniques, industry, environmental analysis and protection, where the heavier isotope are useful. The predominant isotope of the carbon is (¹²C), with the natural abundance of 98.9%, but as tracer in many application is asked the (¹³C) isotope, initially with the concentration of 1.1%. For industrial output and higher concentration, the method of the cryogenic distillation is a proper solution. The paper deals with the general analysis of the operation for the (¹²C) isotope separation column, some design element, the "local" and "global" models for the column operation