Sepiolite-loaded nickel-based catalyst modified by two metals, as well as preparation method and application of sepiolite-loaded nickel-based catalyst

The invention relates to sepiolite-loaded nickel-based catalyst modified by two metals of potassium and lanthanum, as well as a preparation method and application of the sepiolite-loaded nickel-based catalyst to adiponitrile hydrogenation. The preparation method comprises the following steps: taking adiponitrile as a raw material and ethanol as a solvent, and taking sepiolite as a carrier of a catalyst to prepare a nickel-based sepiolite-loaded catalyst modified by potassium and lanthanum as additives. The preparation process of the catalyst comprises acid treatment on sepiolite, and steeping, drying, roasting and reducing of sepiolite after acid treatment. During the adiponitrile hydrogenation process, the reaction pressure is 1-2 MPa, and the reaction temperature is 100-120 DEG C. The catalyst has relatively high activity and 6-aminocapronitrile and hexamethylendiamine selectivity under relatively mild reaction conditions, the raw material of sepiolite is cheap and easy to obtain, and low in cost, and the catalyst is simple in preparation method, and has a good application prospect.