High-selectivity amino acid decarboxylation catalyst and preparation method thereof

The invention discloses an isoleucine decarboxylation catalyst and a preparation method thereof. A catalyst precursor comprises the following components in percentage by mass: 0.1-10% of Ru and the balance of TiO2, wherein TiO2 is a self-made anatase phase carrier and has a Ti < 3 + > structure. The anatase phase carrier is adopted, the dispersity of loaded Ru is improved, and the electronic states of Ru and Ti are fixed in a state which is most beneficial to decarboxylation of amino acid through a specific reduction step so that the highest selectivity of preparing amine through direct decarboxylation is achieved. The catalyst is high in conversion rate, and the conversion rate of the isoleucine decarboxylation reaction can be stably kept at 97.0% or above. The catalyst is applied to a reaction for preparing 2-methylbutylamine through catalytic decarboxylation of isoleucine, and the selectivity of generated amine can be stably kept at 90.0% or above under the reaction conditions thatthe initial pressure is 2