Chemical engineers are principally involved in the production of a wide range of chemicals such as soaps, dyes, polyethene, detergents, fertilizers, cement, bricks etc., foodstuffs such as cooking oil, margarine, beverages and pharmaceuticals as well as petroleum products, but they are also involved in production of potable water, pulp and paper, cars, steel, mineral resources processing, production of energy, textiles, beverages, waste processing and minimization, river, water, soil and air pollution and treatment. Chemical engineers design processes, build and manage chemical operations and ensure efficiency of production by intelligent control and optimization of physical, thermal and chemical parameters.
Materials engineers are essentially involved in the design and selection of materials based on the physical and mechanical properties desired for engineering application. Appropriate materials are required for specific conditions. Engineering materials broadly include metals, polymers, ceramics, including mixtures such as metallic alloys and composites.
Metallurgical engineers specialise primarily in metals and their alloys. The spectrum of metallurgical engineering stretches from minerals processing, metal extraction and refining through to alloying and forming into shapes for use.