Chemical engineering design（化工設計）is concerned with the design of equipment（設備），process（工藝），system（係統）and plants（車間）in which raw materials（原料）are turned into valuable chemical products.It involves many important factors，such as the economics of chemical product development（化工產品開發），cost estimation in building a chemical plant，profitability analysis，process selection，materials of construction，process control，plant location and safety issues.In order to fully understand the principles of chemical engineering design，students need to be familiar with thermodynamics（熱力學），heat，mass and momentum transfer，inorganic and organic chemistry，chemical kinetics（化學動力學），reactor design and many other related subjects.
Chemical engineers design processes based upon physical and chemical changes.The processes may yield marketable items，such as gasoline or penicillin（青黴素），or non-commercial items，such as clean air or clean water.The processes are created by integrating principles from basic sciences，traditionally chemistry，physics，and mathematics，with consideration of economics，environmental impact（環境影響），and employee safety.