Carrier and preparation method therefor, catalyst and preparation method therefor and use thereof, and catalytic diesel oil hydroconversion method using fluidized bed

-24. (canceled)

A preparation method for a hydrogenation catalyst carrier, the method comprising the following steps:

• (1) mixing an aluminum source, a curing agent, a dispersant, and a molecular sieve to obtain a material flow B;
• (2) blending the material flow B with an oil phase to obtain a material flow C;
• (3) mixing the material flow C obtained in step (2) with an emulsifier and an auxiliary agent to obtain a material flow D, and subjecting the material flow D to moulding, aging, washing, drying and roasting.

A hydrogenation catalyst comprising a carrier and active metal components, wherein the carrier uses a molecular sieve as a core layer and aluminum oxide as a shell layer;

• based on the weight of the carrier, the content of aluminum oxide is 30%-70%, and the content of the molecular sieve is 30%-70%;
• and the diameter of carrier particles is within the range of 0.5-3 mm;
• the active metal components comprise at least one of the group VIII metals and at least one of the group VIB metals.