NEW PROCESSES WITH COMPRESSED GASES

By exploiting thermodynamic phenomena in systems with compressed gases , the properties of products such as their morphology and the size of particles and fibers can be tailored to industrial needs. Separation o f complex mixtures can be accomplished. Processes that are conventiona lly operated in a number of costly steps can be reduced to a few opera tions. This article gives a phenomenological classification of such pr ocesses and explains the underlying principles. Operations developed o n a laboratory scale as well as those already established in industry will be discussed.