This is a lecture on the way that we engineers model distillation. How
we have done such modelling, how we would like to do it, and how far
we have come at this moment. The ideas that I will be bringing forward
are not my own. I owe them mostly to R. Krishna, R. Taylor, H. Kooijm
an and A. Gorak. These are people who have spent a fair bit of their l
ives developing modern multicomponent simulation methods of distillati
on. I am just using their results.