Study Of A New Nickel Vapor Phase Benzene Hydrogenation Catalyst

The industrial application of nickel based catalyst for benzene hydrogenation nickel content is very high, poor dispersion of nickel, nickel utilization rate is low, the thermal stability and low toxicity tolerance, by-products, the operation is difficult to control. At the same time in order to ensure the conversion and selectivity, Reduction of nickel content in catalyst, low nickel catalyst will be a trend.This paper mainly introduces the technology for preparation of unique, prepared the radial compressive has high grinding force, larger than γ-Al2O3carrier surface area and the pore structure. Using special dipping process, development of benzene hydrogenation catalyst containing low nickel, high activity. Add structural promoter and enhancer preparation, improves the reduction performance of the catalyst, the conversion of benzene cyclohexane selectivity reached100%, more than99.95%.Based on the experimental study on the reaction temperature, pressure, space velocity, liquid benzene benzene hydrogen molar ratio and other conditions, the optimum process conditions of catalyst:The reaction temperature is140℃, reaction pressure0.6Mpa, liquid airspeed0.8h-1benzene, benzene hydrogen volume ratio6.Compared with the same type of domestic catalyst, new nickel benzene hydrogenation catalyst has the advantages of high activity, high selectivity, high stability and operating temperature range. Due to the impregnation method, the active component content greatly reduced, nickel component of high dispersion, greatly improve the effective utilization rate of Ni, and similar products competitive, with high price advantage.Catalyst product model has in large device the domestic success application, fully meet the needs of the production of the device, to create the objective economic benefit for the use of manufacturers.