In 1924 the Institution of Chemical Engineers adopted the following definition 'A chemical engineer is a professional man experienced in the design, construction and operation of plant and works in which matter undergoes a change of state and composition.'[4] (The first female member joined in 1942.)[5]
As can be seen from the later definition, the occupation is not limited to the chemical industry, but more generally the process industries, or other situations in which complex physical and/or chemical processes are to be managed.
In 1951 the President of the Institution of Chemical Engineers said in his Presidential Address "I believe most of us would be willing to regard Edward Charles Howard (1774-1816) as the first chemical engineer of any eminence"[6]. Others have suggested Johann Rudolf Glauber (1604-1670) for his development of processes for the manufacture of the major industrial acids.[7]