11 Cryogenic air separation plant in the nature of a gas separator for production of principally pressurized oxygen, consisting of main air compressor, air purification adsorbers, cold box, main heat exchanger, air booster compressor, product pumps, turboexpander, main distillation columns, with optional product compressor with production of gaseous nitrogen and some liquid production, with gaseous oxygen production from 20 to 240 short tons per day, and gaseous nitrogen production at project-specific rates