Chemical engineering is a bridge connecting chemistry (chemical reactions in test tube) to the real world outside laboratory. Chemistry engineers find methods for increasing the laboratory scale of processes to an industrial scale. For this purpose, based on knowledge of physical, chemical and biological phenomena, they apply engineering principles to: invent, design, develop and implement processes, manage and operate processes, design and improve products. Chemical engineering is, first of all, knowledge of processes and appliances in industrial systems, ability to design and supervise the operation of industrial systems.