Preparation method of hydrotreating catalyst

Abstract

The invention provides a preparation method of a hydrotreating catalyst, comprising the following steps: uniformly mixing a carrier material and partial active component materials, kneading, forming, drying and roasting to prepare a catalyst carrier, wherein the drying temperature is 200-250 DEG C, the drying time is 1-2h, the roasting temperature is 1000-1200 DEG C, and the roasting time is 3-4h; using the aqueous solution of the remaining active components to spray and dip the catalyst carrier till saturation; taking out, dipping, drying and roasting into the catalyst, wherein the drying temperature is 150-200 DEG C, the drying time is 6-8h, the roasting temperature is 700-900 DEG C, and the roasting time is 12-24h. The finished product catalyst prepared with the method is more concentrated in pore-size distribution and relatively high in specific surface, simultaneously is beneficial to material forming, and ensures the catalyst strength and stacking density, so that corresponding service performances of the catalyst are improved.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst and a preparation method thereof. Background technique [0002] Generally, the hydrotreating catalysts for hydrocarbon feedstocks are based on γ~Al 2 o 3 Or γ~Al containing a small amount of one or more other elements (such as Si, P, Ti, B, Mg, F, etc.) 2 o 3 As the carrier, a certain combination of elements such as W, Mo, Ni and Co is used as the active component. There are generally two methods for supporting catalyst active metals: kneading method and impregnation method. The kneading method refers to the simultaneous addition of active metal compounds during the preparation of the carrier. Its advantages are that the preparation process is simple, the production cycle is short, the efficiency is high, the cost is low, and catalysts with high active metal content can be obtained; the disadvantage is that it is difficult to prepare To make full use of metal components. The impregnati...

AI Technical Summary

Problems solved by technology

The kneading method refers to the simultaneous addition of active metal compounds during the preparation of the carrier. Its advantages are that the preparation process is simple, the production cycle is short, the efficiency is high, the cost is low, and catalysts with high active metal content can be obtained; the disadvantage is that it is difficult to prepare to make full use of metal components

The impregnation method is to make the carrier first and then load the active components. Its advantage is that it is conducive to the dispersion of metal components on the inner surface of the carrier micropores, but the production process is complicated, especially when it is difficult to meet the requirements of the catalyst itself for the amount of metal added in one impregnation. , the complex operation brought by multiple impregnations cannot be compared with the simplicity of the kneading method