Deep hydrodesulfurization catalyst preparation method by carrying nickel and tungsten on multistage porous zeolite

A desulfurization catalyst, deep hydrogenation technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low molecular catalytic performance

Inactive Publication Date: 2015-02-25
HARBIN INST OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low catalytic performance of existing hydrodesulfurization catalysts on molecules with regional re

Method used

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  • Deep hydrodesulfurization catalyst preparation method by carrying nickel and tungsten on multistage porous zeolite
  • Deep hydrodesulfurization catalyst preparation method by carrying nickel and tungsten on multistage porous zeolite
  • Deep hydrodesulfurization catalyst preparation method by carrying nickel and tungsten on multistage porous zeolite

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specific Embodiment approach 1

[0027] Specific implementation mode 1: The preparation method of nickel-tungsten deep hydrodesulfurization catalyst supported by hierarchical porous zeolite in this implementation mode is implemented according to the following steps:

[0028] 1. Calcining the zeolite at 500-600°C for 4.5-5.5 hours to obtain microporous hydrogen zeolite;

[0029] 2. Add the microporous hydrogen-type zeolite obtained in step 1 into the acid solution with a concentration of 0.1-4mol / L, heat and reflux for 0.5-4h, then wash with deionized water until the filtrate is neutral, and dry it at 500 Calcining at ~600°C for 4.5~5.5h to obtain dealuminated zeolite;

[0030]3. Add the dealuminated zeolite obtained in step 2 into the alkali solution with a concentration of 0.1-2mol / L, stir at 60-70°C for 0.2-3h, then wash with deionized water until the filtrate is neutral, and dry it Finally, use ammonium nitrate solution for ion exchange, and then calcine at 500-600°C for 4-6 hours to obtain hydrogen-type ...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment is different from Embodiment 1 in that Step 2 is heated to reflux at 60-70° C. for 0.5-4 hours. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the solid-to-liquid ratio of the microporous hydrogen zeolite to the acid solution in Step 2 is 1 g:30 mL. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a deep hydrodesulfurization catalyst preparation method by carrying nickel and tungsten on multistage porous zeolite and relates to the preparation method of the deep hydrodesulfurization catalyst. The preparation method is used for solving the problem that the existing hydrodesulfurization catalyst has lower catalytic performance on molecules with regional block effect. The preparation method comprises the following steps of: (1) calcining zeolite to obta microporous hydrogen-type zeolite; (2) adding the microporous hydrogen-type zeolite into acid solution, and then carrying out calcining treatment to obtain dealuminated zeolite; (3) adding the dealuminated zeolite into alkaline solution for treatment, then carrying out ion exchange by using ammonium nitrate, and calcining to obtain a hydrogen desiliconized multistage porous zeolite molecular sieve; (4) adding the zeolite molecular sieve into the acid solution, and calcining to obtain strong-acid multistage porous zeolite; and (5) absorbing nickel and tungsten phase on the strong-acid multistage porous zeolite, and finishing preparation of the hydrodesulfurization catalyst. The preparation method disclosed by the invention has the advantages that the zeolite used as a material is commercial zeolite, the price is low, the mesoporous degree is improved after multistage porous treatment, and the active site of the nickel and tungsten phase is used, so that the catalytic reaction capability is better.

Description

technical field [0001] The invention relates to a preparation method of a deep hydrogenation desulfurization catalyst. Background technique [0002] The desulfurization process is a necessary process of petroleum refining, mainly to provide protection for various subsequent catalysts, because sulfur is very easy to poison and deactivate acidic catalysts such as subsequent cracking and catalytic reforming. In addition, reducing the sulfur content in fuel oil is also beneficial to reduce engine corrosion and wear, and improve the quality of petroleum products, such as: stability, calorific value, etc. [0003] However, with the progress of the times, fuel oil desulfurization technology has become an increasingly popular research topic. On the one hand, the quality of crude oil is declining, and the proportion of heavy oil in recoverable oil is getting higher and higher, and the sulfur content in heavy oil is higher. Second, the importance of global environmental pollution is...

Claims

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Application Information

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IPC IPC(8): B01J29/26B01J35/10C10G45/12
Inventor 孙印勇王一
Owner HARBIN INST OF TECH
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