Using cobalt chloride and ferromanganese as precursor of cobalt-based catalyst, the performance of the catalyst for hydroformylation of cyclohexene was studied. The influences of solvent, reaction temperature and pressure in the system on the reaction were investigated. The results reveal that THF is a good solvent for the reaction and the optimal reaction condition is p_total＝8.0 MPa, n_Co/n_alkene＝0.01 and t＝145 ℃. Under the optimal reaction condition the conversion of cyclohexene is 89% and the selectivity to cyclohexanecarboxaldehyde is 96%.

Key words: cobalt-based catalyst, cyclohexene, hydroformylation, cyclohexanecarboxaldehyde