The preparation method of mo-sba-15 molecular sieve and hydrogenation catalyst

Abstract

The invention relates to a preparation method of a Mo-SBA-15 molecular sieve. The compounding steps include adding a mesoporous material SBA-15, which is self-assembled in a strong-acid system but not subjected to hydro-thermal treatment, into a solution containing a VIB-family metal precursor, adjusting the reaction system pH value to 0-2, and subjecting the solution to high-temperature hydrothermal crystallization to obtain a sample, namely the SBA-15 molecular sieve containing VIB metal. The obtained Mo-SBA-15 molecular sieve has the advantages of high loading capacity, high dispersity and highly-ordered mesopores. By taking the Mo-SBA-15 molecular sieve as a carrier, a catalyst with high large specific surface area, excellent reactive metal dispersity, high acidity and excellent hydrodesulphurization performance can be obtained only via a VIII-family metal impregnation process.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a preparation method of Mo-based SBA-15 molecular sieve and loaded hydrogenation catalyst used for refining petrochemical products. Background technique [0002] Hydrofining technology is the most important means to produce low-sulfur gasoline and diesel, and hydrofining catalyst is the core technology of hydrofining process. An ideal diesel hydrotreating catalyst support should have a large specific surface area, concentrated and large pore distribution, suitable acid centers and suitable interaction with active components. With group VIB metal W or Mo as the main active component, group VIII metal Ni or Co as auxiliary active component, and γ-Al 2 o 3 The supported catalyst is a hydrorefining catalyst widely used commercially. γ-Al 2 o 3 Good mechanical properties and regeneration performance, low price, but γ-Al 2 o 3 The carrier has the following three...

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Problems solved by technology

γ-Al 2 o 3 Good mechanical properties and regeneration performance, low price, but γ-Al 2 o 3 The carrier has the following three problems: one is γ-Al 2 o 3 There is a strong interaction with the active components; the second is γ-Al 2 o 3 The specific surface area is low; the third is γ-Al 2 o 3 Only L acid centers, no B acid centers, which limit its application in deep desulfurization and dearomatization catalysts for diesel

Microporous zeolite molecular sieves have become important catalysts in the field of petrochemicals due to their shape-selective catalysis and the presence of different acid centers in the pores, but their small pore size (less than 2.0nm) severely limits their use in reactions involving organic macromolecules practical applications, and ordered mesoporous materials can effectively meet the needs of this aspect

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