Chemical Engineering is the profession in which knowledge of mathematics, physics, chemistry and biology, gained by study, experience, and practice, is applied with judgment to develop economic and safe ways of using materials to benefit mankind. Chemical Engineering is a broad discipline dealing with processes (industrial and natural) involving the transformation (chemical, biological, or physical) of matter or energy into forms useful for mankind, economically and without compromising environment, safety, or finite resources.

Chemical engineering is the branch of engineering that deals with the application of chemistry and physics with mathematics, to the process of converting raw materials or chemicals into more useful or valuable forms. Apart from producing useful materials, chemical engineering is also concerned with pioneering valuable new materials and techniques; an important form of research and development.

A person employed in this field is called a chemical engineer. Chemical engineers involve in the design and maintenance of chemical processes for large-scale manufacture. Chemical engineers are usually employed under the title of process engineer. Indeed, chemical engineers are responsible for the availability of the modern high-quality materials that are essential for running an industrial economy.

The application of engineering principles to conceive, design, develop, operate, or use processes and products based on chemical and physical phenomena. The chemical engineer is considered an engineering generalist because of a unique ability (among engineers) to understand and exploit chemical change. Drawing on the principles of mathematics, physics, and chemistry and familiar with all forms of matter and energy and their manipulation, the chemical engineer is well suited for working in a wide range of technologies.

Although chemical engineering was conceived primarily in England, it underwent its main development in America, propelled at first by the petroleum and heavy-chemical industries, and later by the petrochemical industry with its production of plastics, synthetic rubber, and synthetic fibers from petroleum and natural-gas starting materials. In the early twentieth century, chemical engineering developed the physical separations such as distillation, absorption, and extraction, in which the principles of mass transfer, fluid dynamics, and heat transfer were combined in equipment design. The chemical and physical aspects of chemical engineering are known as unit processes and unit operations, respectively.

Chemical engineering now is applied in biotechnology, energy, environmental, food processing, microelectronics, and pharmaceutical industries to name a few. In such industries, chemical engineers work in production, research, design, process and product development, marketing, data processing, sales, and, almost invariably, throughout top management.