Method of preparing cyclopentane by continuous hydrogenation of cyclo pentadiene

The continuous cyclopentadiene hydrogenating process to prepare cyclopentane is one continuous catalytic hydrogenation reaction of the mixture of cyclopentadiene, solvent and hydrogen in a fixed bed catalyst bed. The catalyst includes gamma-Al2O3 as carrier and Pa as active component. The solvent is any one of cyclopentane, n-hexane, benzene, toluene, cyclohexane, ethanol, methanol, etc. The molar ratio between cyclopentadiene and hydrogen is 1 to (3-4), and the reaction system has pressure of 0.9-1.8MPa and temperature of 44-72 deg.c. The reacted liquid is discharged partially and externally circulated partially with the weight ratio being 1 to 6-12, and the externally circulated liquid after being cooled is mixed with cyclopentadiene material and solvent before being mixed with hydrogen in venturi ejector, atomized into gas-liquid mixture and reacted in the catalyst bed. The catalyst load is 2-4/hr accounted in liquid phase material, and the reacted heat is transferred via external circulation.