"A branch of engineering concerned with the application of chemistry to industrial processes, and involving esp. the design, operation, and maintenance of equipment used to carry out chemical processes on an industrial scale." - Oxford English Dictionary
"Chemical engineering is the profession in which a knowledge of mathematics, chemistry, and other natural sciences gained by study, experience, and practice is applied with judgment to develop economic ways of using materials and energy for the benefit of mankind." - Definition of the Profession, Constittution of the American Institute of Chemical Engineers (AIChE)
