Preparation, Characterization And Catalytic Performance Of Solid Phosphoric Acid Catalyst

With increasing environmental consciousness and the demands on the process of economic development, a kind of catalyst, which both protects environment and improves economic efficiency, needs to be applied in the practically chemical industry. This kind of catalyst shows high activity, high selectivity, which allows the use of relatively small reactors and operation at mild condition. Solid acid catalyst is the most widely used catalysts owing to their higher acid strength, thermal stability and environmentally benign and presenting fewer disposal problems. Their separation from liquid products is easier than the homogeneous catalysts. But most of solid acid still process some disadvantages, for example, easy elution of active components, low mechanical strength, complexes surface property of the catalyst and intricate catalytic mechanism, which confine the catalysts to be widely used in the practical production. Particularly, the service life of catalysts is the important factors during they are used practically. How to study and tap catalysts of new type higher benefits and longer service life become the hot topics. We select various supports and different active components to prepare several series of solid acid catalytic performance of catalysts and study the delution of active components on the supports. The preparation condition of complex solid phosphoric acid catalyst was studied. The catalyst was also used in amplifying reactions. All above provide a great number of referential data in the practical researches. Diatomite and active carbon are choosed as carrier, phosphoric acid is choosed as impregnating solution. The solid phosphoric acid catalyst was prepared by impregnating methods. Acid amount of the solid phosphoric acid catalyst is correlative with the catalytic activity. The effects of different experimental conditions on the acid amount were studied. Infrared spectroscopy (IR), X-ray diffraction (XRD), Hammett indicator methods were employed to characterize...