High-denitrification-activity heavy distillate hydrotreating catalyst and preparation method thereof
A technology for hydrotreating and heavy distillate oil, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of small mesoporous ratio, poor mixing uniformity, poor pore connectivity, etc. High desulfurization rate and denitrification rate, the effect of improving the denitrification rate
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Embodiment 1
[0037] Embodiment 1 Y / MCM-41 composite molecular sieve / ASA and catalyst
[0038] The surface of molecular sieve HY after the acid treatment in Comparative Example 1 was partially etched with 0.1 mol / L NaOH to obtain Y molecular sieve NY with regular surface structure. During the crystallization process of the MCM-41 molecular sieve synthesis process, 3g NY molecular sieve was added into the crystallization kettle equipped with the above mesoporous molecular sieve precursor, and the micro-mesoporous composite molecular sieve NY / MCM-41 was obtained after crystallization, wherein Y The mass of the molecular sieve accounts for 25% of the total mass of the micro-mesoporous composite molecular sieve, and the mass of the MCM-41 molecular sieve accounts for 75% of the total mass of the composite molecular sieve.
[0039] The acid-treated HY molecular sieve in Comparative Example 1 was replaced with a micro-mesoporous composite molecular sieve NY / MCM-41 molecular sieve, which was evenl...
Embodiment 2
[0041] Embodiment 2 Y / MCM-41 composite molecular sieve / ASA and catalyst
[0042] When preparing silicon-aluminum composite oxide in comparative example 1, the quality of water glass is increased to 140g, and in the prepared silicon-aluminum oxide, SiO 2 The content is 80wt%, and then uniformly mixed with the NY / MCM-41 molecular sieve prepared in Example 1 to prepare a composite carrier. The preparation steps and conditions of the catalyst are the same as in Comparative Example 1.
[0043] The evaluation conditions of the catalyst were the same as in Comparative Example 1. The hydrogenation desulfurization rate of the coker gas oil of the catalyst is 91%, and the denitrogenation rate is 88%.
Embodiment 3
[0044] Embodiment 3 Y / SBA-15 composite molecular sieve / ASA and catalyst
[0045] The surface of molecular sieve HY after the acid treatment in Comparative Example 1 was partially etched with 0.1 mol / L NaOH to obtain Y molecular sieve NY with a regular surface structure. During the crystallization process of the SBA-15 molecular sieve synthesis process, 5g NY molecular sieve was added to the crystallization kettle equipped with the above mesoporous molecular sieve precursor, and the micro-mesoporous composite molecular sieve NY / SBA-15 was obtained after crystallization, wherein The mass of the Y molecular sieve accounts for 20% of the total mass of the composite molecular sieve, and the mass of the SBA-15 molecular sieve accounts for 80% of the total mass of the composite molecular sieve.
[0046] The HY molecular sieve in Comparative Example 1 was replaced with the micro-mesoporous composite molecular sieve NY / SBA-15 molecular sieve, which was uniformly mixed with the silicon-...
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