Chemical Processes, Metals, and Alloys
A responsible chemical process converts matter at useful scale while accounting for mass, energy, safety, and the full material life cycle.
1. From reaction to process
A large-scale process combines reaction with preparation, heat transfer, mixing, separation, purification, recycle, and control. For a steady process without accumulation, total mass entering equals total mass leaving. A component balance tracks each element or compound through product, recycle, by-product, emission, and waste streams. Conversion is the fraction of reactant consumed; yield is desired product obtained relative to a theoretical amount; selectivity compares desired product with unwanted products.
Unreacted material can be separated and returned, improving overall use. Recycle does not violate conservation: every pass and purge must still be counted. A purge prevents accumulation of inert impurities.