Catalyst for synthesizing 6-aminocapronitrile, preparation method thereof and method for synthesizing 6-aminocapronitrile by using catalyst

The invention provides a preparation method of a catalyst for synthesizing 6-aminocapronitrile from caprolactam. The preparation method comprises the following steps: 1) preparing a mixed aqueous solution of ternary active components of ytterbium nitrate, calcium nitrate and copper nitrate for later use; (2) weighing a ZSM-5 silicon-aluminum molecular sieve, and adding the molecular sieve into the mixed aqueous solution of the ternary active components in the step (1); (3) dipping for 4-10 hours at the temperature of 25-80 DEG C; and 4) evaporating to dryness, drying, forming and roasting to obtain the catalyst. Wherein the mass ratio of the ytterbium nitrate to the calcium nitrate to the copper nitrate is 1: (1-20): (1-20), and the ratio of the total mass of the ytterbium nitrate, the calcium nitrate and the copper nitrate to the mass of the ZSM-5 silicon-aluminum molecular sieve is (0.01-0.4): 1. The catalyst disclosed by the invention is simple in preparation method, stable in quality, high in catalytic ef