Patent ID: 8889936
Filing Date: 2014-11-18
Classification: B01J,C07C,Y02P,Y10S

Abstract:
1. A method for hydrogenating benzene to cyclohexane consisting of the following steps: a) Providing benzene and a ruthenium catalyst, wherein the ruthenium catalyst is selected from among the following groups; b) Hydrogenating the benzene by contact with hydrogen in the presence of the ruthenium catalyst until the catalyst has a reduced hydrogenation activity, c) Regenerating the catalyst consisting of flushing with inert gas until an activity of >90% of the original activity has been attained, and d) Optionally, repeating steps a) to c); wherein step c) is carried out without removal of the catalyst, and wherein the pressure applied during flushing is from 0.5 to 5 bar.