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Preparation method of step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC (Fluid Catalytic Cracking) petroleum

A ZSM-5, composite material technology, applied in molecular sieve catalysts, physical/chemical process catalysts, petroleum industry, etc., can solve the difficulty of conversion and removal of macromolecular thiophene sulfides, the inability to effectively utilize zeolite, and the reduction in utilization rate, etc. problem, to achieve the effect of excellent sulfur transfer desulfurization rate

Inactive Publication Date: 2012-04-18
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the zeolites used in the above catalysts have strong acidity, they all have only a single microporous system and lack the existence of mesopores. Due to the steric hindrance effect, the conversion and removal of macromolecular thiophene sulfides becomes difficult; At the same time, the above-mentioned catalysts are all prepared by direct mixing method, that is, zeolite is directly mixed with refractory oxides, binders and pore-enlarging agents to obtain zeolite-containing catalysts through extrusion molding. The disadvantage of the catalysts obtained in this way is that they cannot be effectively Using zeolite inside the carrier, its utilization rate is greatly reduced

Method used

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  • Preparation method of step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC (Fluid Catalytic Cracking) petroleum
  • Preparation method of step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC (Fluid Catalytic Cracking) petroleum
  • Preparation method of step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC (Fluid Catalytic Cracking) petroleum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] At 60°C, 0.53g NaOH, 5.0g of the substrate prepared in Comparative Example 1 and 70mL of deionized water were stirred and mixed uniformly, and 0.35g of Al was added. 2 (SO 4 ) 3 ·18H 2 O, 2.62g TPABr and 6.54g TEOS are mixed uniformly to obtain a mixed system of starting sol;

[0045] Add 1.35g of polyquaternary ammonium salt PCD to the mixing system of the starting sol, stir it evenly, and age for 24h;

[0046] Transfer the obtained final mixture into a stainless steel reactor lined with polytetrafluoroethylene, and perform 72h hydrothermal crystallization at 170°C;

[0047] The hydrothermal crystallization product was ultrasonically cleaned, and the template-containing stepped pore ZSM-5 zeolite composite material was separated, washed with deionized water to pH=7-8, and then dried at 120°C for 12 hours to obtain the template-containing agent The stepped pore ZSM-5 zeolite composite material;

[0048] The above stepped pore ZSM-5 zeolite composite material containing template...

Embodiment 2

[0052] MoO 3 The impregnation amount is 11.0wt.%, and other preparation conditions are the same as in Example 1. The template-free stepped pore ZSM-5 zeolite composite material prepared is marked as Cat-3-support. The powder XRD pattern is shown in figure 1 , The pore structure parameters are shown in Table 1. The final FCC gasoline low-temperature sulfur transfer catalyst based on the stepped pore ZSM-5 zeolite composite material is recorded as Cat-3. by figure 1 It can be seen that the material not only has the characteristic diffraction peak of typical ZSM-5 molecular sieve, but also the characteristic diffraction peak of γ-alumina.

Embodiment 3

[0054] MoO 3 The impregnation amount of the zeolite is 13.0wt.%, and the other preparation conditions are the same as in Example 1. The template-free stepped pore ZSM-5 zeolite composite material prepared is marked as Cat-4-support. The powder XRD pattern is shown in figure 1 , The pore structure parameters are shown in Table 1. The final FCC gasoline low-temperature sulfur transfer catalyst based on the stepped pore ZSM-5 zeolite composite material is recorded as Cat-4. by figure 1 It can be seen that the material not only has the characteristic diffraction peak of typical ZSM-5 molecular sieve, but also the characteristic diffraction peak of γ-alumina.

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Abstract

The invention relates to a preparation method of a step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC (Fluid Catalytic Cracking) petroleum. The method comprises the following steps of: mixing deionized water, an alkali source and a substrate, adding an aluminum source, a microporous template agent and a silicon source, uniformly stirring to obtain aninitial sol mixed system, adding a mesoporous template agent, uniformly stirring, aging, and performing hydrothermal crystallization; cleaning a hydrothermal crystallization product, washing, separating, drying and baking to obtain a step hole ZSM-5 zeolite composite material; performing ammonium exchange treatment on the step hole ZSM-5 zeolite composite material, cleaning, washing, separating, drying and baking to obtain a hydrogen-type step hole ZSM-5 zeolite composite material; and stepwise soaking an aid and active ingredients onto the hydrogen-type step hole ZSM-5 zeolite composite material by adopting an equal-volume soaking method, airing at the room temperature, drying, and baking to obtain the step hole ZSM-5 zeolite composite material-based low-temperature sulfur transfer catalyst for FCC petroleum. The sulfur transfer removing rates of mercaptan and thiophene can be over 90 percent.

Description

Technical field [0001] The invention relates to a method for preparing an FCC gasoline low-temperature sulfur transfer catalyst based on a stepped pore ZSM-5 zeolite composite material, and belongs to the technical field of zeolite composite material and petroleum catalyst preparation. Background technique [0002] At present, more than 85% of gasoline in my country is composed of catalytic cracking (FCC) gasoline components. The high sulfur content and olefin content of FCC gasoline have been the key issues that plague the production of clean gasoline. [0003] At this stage, the main technology used for FCC gasoline desulfurization is hydrodesulfurization, which is a relatively mature method, but its disadvantage is that it requires high temperature and high pressure, the requirements for equipment and operating conditions are relatively high, and there is excessive The presence of hydrogen will saturate the high-octane olefins in gasoline, produce lower octane alkanes, reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01J35/10C10G45/12
Inventor 范煜祝伟薛倩倩鲍晓军石冈
Owner BC P INC CHINA NAT PETROLEUM CORP
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