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Ultra-deep desulfurization catalyst and preparation method thereof

A deep desulfurization and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low stability of metal chelates, low catalytic activity, uneven dispersion of metal components, etc. , to achieve the effects of weakening steric hindrance, high dispersion and appropriate stacking degree

Active Publication Date: 2018-01-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal chelates have low stability and are easily decomposed during the loading process, resulting in uneven dispersion of metal components and low catalytic activity.

Method used

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  • Ultra-deep desulfurization catalyst and preparation method thereof
  • Ultra-deep desulfurization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment provides a method for preparing an ultra-deep desulfurization catalyst, the method comprising the following steps:

[0053] 1.04g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 50ml of deionized water, and then the pH was adjusted to 3.0 with a concentration of 2.4mol / L HCl solution; at 50°C, 20ml concentration of 0.074mol / L (C 16 h 33 N(CH 3 ) 2 C 6 h 12 N(CH 3 ) 2 C 16 h 33 )Br 2 solution, adjust the pH to 3.0 with a HCl solution with a concentration of 2.4mol / L, and stir at a constant temperature of 50°C for 2h; centrifuge the solution and dry it at 100°C for 6h to obtain a Mo-based precursor connected to a double-ended quaternary ammonium salt;

[0054] Will contain 96.4wt.% Al 2 o 3 and 3.6wt.% SiO 2 SiO 2 -Al 2 o 3 The carrier is compressed into tablets under a pressure of 10 MPa, and passed through a 20-40 mesh sieve to obtain the carrier SA;

[0055] Take 1.791g of the above-mentioned Mo-based precursor and disperse it in 70ml o...

Embodiment 2

[0060] This embodiment provides a method for preparing an ultra-deep desulfurization catalyst, the method comprising the following steps:

[0061] 1.04g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 50ml of deionized water, and then the pH was adjusted to 3.0 with a concentration of 2.4mol / L HCl solution; at 80°C, 20ml concentration of 0.074mol / L (C 8 h 17 N(CH 3 ) 2 C 6 h 12 N(CH 3 ) 2 C 8 h 17 )Br 2 solution, adjust the pH to 3.0 with a HCl solution with a concentration of 2.4mol / L, and stir at a constant temperature of 80°C for 3h; centrifuge the solution and dry it at 100°C for 6h to obtain a Mo-based precursor connected to a double-ended quaternary ammonium salt;

[0062] Will contain 96.4wt.% Al 2 o 3 and 3.6wt.% SiO 2 SiO 2 -Al 2 o 3 The carrier is compressed into tablets under a pressure of 10 MPa, and passed through a 20-40 mesh sieve to obtain the carrier SA;

[0063] Take 1.791g of the above-mentioned Mo-based precursor and disperse it in 70ml of ...

Embodiment 3

[0068] This embodiment provides a method for preparing an ultra-deep desulfurization catalyst, the method comprising the following steps:

[0069] 1.04g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 50ml of deionized water, and then the pH was adjusted to 3.0 with a concentration of 2.4mol / L HCl solution; at 30°C, 20ml concentration of 0.049mol / L (C 16 h 33 N(CH 3 ) 2 C 6 h 12 N(CH 3 ) 2 C 6 h 12 N(CH 3 ) 2 C 16 h 33 )Br 2 solution, adjust the pH to 2.0 with a HCl solution with a concentration of 2.4mol / L, and stir at a constant temperature of 30°C for 2h; centrifuge the solution and dry it at 120°C for 6h to obtain a Mo-based precursor connected to a double-ended quaternary ammonium salt;

[0070] Will contain 96.4wt.% Al 2 o 3 and 3.6wt.% SiO 2 SiO 2 -Al 2 o 3 The carrier is compressed into tablets under a pressure of 10 MPa, and passed through a 20-40 mesh sieve to obtain the carrier SA;

[0071] Take 1.791g of the above-mentioned Mo-based precursor a...

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Abstract

The invention relates to an ultra-deep desulfurization catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving molybdate in deionized water to obtain a molybdate water solution, regulating the pH value to 1.0-5.0, adding a multi-tailed quaternary ammonium salt aqueous solution, regulating the pH value to 1.0-5.0, performing centrifugation, washing and drying to obtain a Mo-based precursor GSMPs; (2) dispersing the GSMPs in deionized water, adding a SiO2-Al2O3 carrier which is subjected to tabletting and sieving for reaction, performing washing and drying to obtain GSMPs / SA, and performing roasting to obtain an oxidation-state catalyst Mo-GSHD; (3) dipping the GSHD with a nickel salt solution, and performing drying and roasting to obtain an oxidation-state catalyst NiMo-GSHD; and (4) performing prevulcanization on the NiMo-GSHD to obtain the ultra-deep desulfurization catalyst. The catalyst is suitable for the modification of inferior fuel oil, is especially suitable for high-sulfur fuel oil, and can realize the ultra-deep desulfurization of fuel oil.

Description

technical field [0001] The invention relates to an ultra-deep desulfurization catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] With the rapid economic development and the increasing number of vehicles, refineries must produce ultra-low sulfur clean fuel to meet increasingly stringent environmental regulations and oil standards. However, for 4,6-dimethyldibenzothiophene, a macromolecular sulfur-containing compound, it is difficult to remove it due to the steric hindrance of the methyl groups at the 4 and 6 positions, which poses a severe test for ultra-deep desulfurization of fuel oil. . Hydrodesulfurization technology is a widely used method to remove sulfide in fuel oil, and the synthesis of high-performance hydrodesulfurization catalyst is the key to improve its desulfurization effect. [0003] Catalysts synthesized with Mo(W) sulfide as the active component and Ni(Co) as the auxiliary agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C10G45/08
Inventor 范煜徐俊东王世华
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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