This book discusses current changes in chemical engineering and gives a comprehensive summary of the developments occurring within this field. From the kinetic and thermodynamic molding aspect, the molecular angle is extremely significant. Hence, most of the issues discussed within this book were written keeping in mind industrial problems and posit solutions to these problems from experts around the world. The contents of the book broadly belong to two categories, process engineering and separation technology. This book will provide fundamental knowledge regarding this field to both students and professionals.