This book provides a comprehensive description of the catalytic technologies for selective hydrogenation of benzene to cyclohexene. Focusing on selective hydrogenation of benzene to prepare cyclohexene and its downstream products, such as cyclohexanone, bulk chemicals and high-value fine chemicals, it also discusses the objective laws, reaction mechanisms and scientific significance based on experimental data, analysis and characterization results. Given its scope, the book will appeal to a broad readership, particularly professionals at universities and scientific research institutes, senior undergraduates, master's and doctoral graduate students as well as practitioners in industry.