【正文】
Chemical Engineering came out.v3 Third period: from 19501960, Transport Phenomena appeared.v v4 Fourth period: in 1970s, Knowledge exposition, many subjects joined together. Lots of new subjects appeared, such as environmental chemical engineering, biochemical engineering, energy chemical engineering.v5 Fifth period: from 1980s1990s, MIT suggested Integrated chemical engineering, and regressive engineering.v6 Sixth period: in the 21st century. Green chemistry, biochemorphic Chem. Eng. ide