Unit 3 Typical Activities of Chemical Engineers化学工程师的例行工作The classical role of the chemical engineer is to take the discoveries made by the chemist in the laboratory and develop them into money-making, commercial-scale chemical processes. The chemist works in test tubes and Parr bombs with very small quantities of reactants and products (e.g., 100 ml), usually running “batch”, constant-temperature experiments. Reactants are placed in a small container in a constant temperature bath. A catal