PRODUCTION OF CYCLOHEXENE

摘要

PURPOSE:To provide a production method capable of preventing formation of a dirt layer which was a trouble until now in the production of cyclohexene by partial reduction of benzene, and stably producing cyclohexene for a long period. CONSTITUTION:This production method is to partly reduce benzene with hydrogen in the presence of a ruthenium catalyst and water in a liquid phase at a high temperature and a high pressure, separate the oil phase composed of reactional products and unreacted raw materials from the aqueous phase composed of a catalyst slurry and continuously recover cyclohexene from the oil phase. The characteristic of this method for production of cyclohexene is that the concentration of indene in benzene as the raw material is controlled to <=50ppm.