Method for preparing sec-butylamine through methyl ethyl ketone catalytic ammonization hydrogenation

The invention relates to a method for preparing sec-butylamine through methyl ethyl ketone catalytic ammonization hydrogenation. According to the invention, a tubular reactor is adopted; methyl ethyl ketone is adopted as a raw material; under the existence of a catalyst containing Ni and Cu or Cr or Zn or Fe, and under the condition that a methyl ethyl ketone volume space velocity is 0.3-2.5h, methyl ethyl ketone, hydrogen gas and ammonia gas are simultaneously delivered from the upper end of the reactor according to a molar ratio of 1:1-10:1-10; and a methyl ethyl ketone continuous ammonization hydrogenation reaction is carried out under a temperature of 80-160 DEG C and a normal pressure, such that sec-butylamine can be obtained by continuous preparation. According to the invention, a preparation process of the catalyst is simple, a metal load is low, and a catalytic activity is high; the reaction conditions are mild, and high-yield sec-butylamine can be obtained under normal pressure; and only trace se