The book "Sulphonation Technology in the Detergent Industry" offers a comprehensive analysis of sulphonation technology and its application in the detergent industry. It is aimed at engineers and chemists involved in the practical operation of sulphonation plants or in research and development. The work covers the sulphonation of various chemical compounds, including alkylbenzene, primary alcohols, and fatty acid methyl esters, with a particular focus on sulfur-based S/Air sulphonation technology. The first half of the book is dedicated to raw material requirements, safety aspects, as well as storage and handling. The subsequent sections detail the chemical processes, including the main reactions and relevant chemical data for process selection and plant design. Additionally, the process equipment from various suppliers is examined, taking into account the aspects of chemical reaction engineering. The book is also suitable as a teaching resource for students in chemical engineering.