The invention discloses an
alkyl anthraquinone hydrogenation catalyst and a preparation method thereof. The
alkyl anthraquinone hydrogenation catalyst is applied to a technology for producing
hydrogen peroxide by an
anthraquinone method. The
alkyl anthraquinone hydrogenation catalyst is prepared from a catalyst carrier (a CNTs-TiO2 complex) and an
active component (
palladium atoms) by an equivalent-volume impregnation method, wherein in terms of the elementary
palladium atoms, the
active component accounts for 0.1-5% of the total weight of the alkyl anthraquinone hydrogenation catalyst; the CNTs-TiO2 complex is prepared from TiO2 and Ni(NO3)2 by a
chemical vapor deposition method in the presence of a
carbon source gas; the
molar ratio of the TiO2 to the Ni(NO3)2 is (0.04-0.25): (0.015-0.2); CNTs accounts for 5-30% of the total weight of the CNTs-TiO2 complex. In the alkyl anthraquinone hydrogenation catalyst, the carrier CNTs-TiO2 complex has a relatively large external specific surface area, so that envelopment of the
palladium atoms in the carrier can be effectively reduced, and thus the palladium atoms are fully utilized to improve the activity of the alkyl anthraquinone hydrogenation catalyst; meanwhile, the acidity of the CNTs-TiO2 complex is weaker than Al2O3, and under the action of the TiO2, occurrence of a
degradation reaction in the reaction process can be effectively reduced, so that production of a degraded product in a
working fluid is reduced. The alkyl anthraquinone hydrogenation catalyst has the characteristics of high hydrogenation efficiency, low anthraquinone degradation and the like in the process of producing the
hydrogen peroxide by the anthraquinone method.