Superdeep hydrodesulfurization catalyst and preparation method thereof

A desulfurization catalyst, deep hydrogenation technology, applied in molecular sieve catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. problems, to increase the pore size and pore volume, to avoid uneven distribution of molecular sieves, and to improve the effect of pore structure

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
11 Cites 22 Cited by

AI-Extracted Technical Summary

Problems solved by technology

4,6-Dimethyldibenzothiophene sulfide is usually the most difficult type of sulfide to remove, because the methyl group next to the sulfur atom creates steric hindrance between the sulfur atom and the active center of the catalyst, Sulfur atoms are not easy to access the active center of the reaction, which leads to a significant decrease in the reaction rate
In the prior art, only emphasis is placed on the type ...
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Abstract

The invention discloses a bulk phase superdeep hydrodesulfurization catalyst and a preparation method thereof. The catalyst comprises NixWyOz which is a composite oxide, MoO3 and aluminum oxide and microporous and mesoporous composite molecular sieves. The method comprises the following steps of: adding proper quantity of water-solubility nitrogenous compounds in the precipitation process of Ni, W and Al, gelatinating, adding serous fluid of the composite molecular sieves, aging, beating the mixture with the MoO3, and forming and activating to prepare the bulk phase superdeep hydrodesulfurization catalyst. By the method, a pore structure of the catalyst is improved, so that more metal active sites are exposed from the surface of the catalyst to improve the utilization rate of active metal, and the composite molecular sieves contact the hydrogenated active metal uniformly and better coordinate with the hydrogenated active metal to produce the performance of the composite molecular sieves fully and achieve the effect of superdeep desulfuration of diesel oil, and particularly, the effect of processing macromolecular distillate with more content is more obvious.

Application Domain

Technology Topic

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  • Superdeep hydrodesulfurization catalyst and preparation method thereof
  • Superdeep hydrodesulfurization catalyst and preparation method thereof
  • Superdeep hydrodesulfurization catalyst and preparation method thereof

Examples

  • Experimental program(5)
  • Comparison scheme(3)

Example Embodiment

[0033] Example 1
[0034] Add 1000ml water to the dissolving tank and the concentration is 10.9g/cm 3 354 ml of aluminum chloride solution, 33 g of nickel chloride and 41.6 g of ammonium metatungstate were dissolved to prepare a mixed solution. Take 160 g of ammonium bicarbonate to prepare an aqueous solution with a molar concentration of 2.5 mol/l. Then the mixed solution, ammonium bicarbonate aqueous solution, and 10% ammonia water as a precipitating agent are simultaneously added into a reaction tank filled with purified water to form a gel, the gelation pH value is 8.0, and the gelation temperature is 60°C. After gelation is over, add 10 grams of ZSM-5/MCM-41 mixed molecular sieve slurry (the preparation method of ZSM-5/MCM-41 mixed molecular sieve is as in patent CN1393400A example 1, the ratio of microporous to mesoporous molecular sieve is 60:40), Aging for 2 hours. After aging, filter, add 600ml purified water and 7.2g molybdenum trioxide to the filter cake, beat and stir evenly, filter, the filter cake obtained is dried at 80℃ for 5 hours, then extruded, washed with pure water 3 times, the wet bar is at 120 After drying at ℃ for 5 hours and calcining at 500 ℃ for 4 hours, the final catalyst A was obtained. The composition and main properties are shown in Table 1, and the pore distribution is shown in Table 2.

Example Embodiment

[0035] Example 2
[0036] According to the method of Example 1, according to the composition ratio of the catalyst B in Table 2, aluminum chloride, nickel chloride, ammonium metatungstate, phosphoric acid, and water glass were added to the dissolution tank to prepare a mixed solution. Take 100 g of ammonium bicarbonate to prepare a solution with a molar concentration of 2.0 mol/l. Then, the mixed solution, ammonium bicarbonate aqueous solution, and 20% ammonia water as a precipitating agent were simultaneously added into a reaction tank filled with purified water to form a gel. The gelation pH was 9.0 and the gelation temperature was 70°C. After gelation is over, add 8 grams of Y/MCM-41 composite molecular sieve slurry (the preparation method of Y/MCM-41 composite molecular sieve is as in Example 2 of patent CN1393403A, the ratio of microporous to mesoporous molecular sieve is 50:50), aging for 3 hours, After aging, filter, add 600ml of purified water and 10.5g of molybdenum trioxide to the filter cake, beat and stir evenly, filter, the filter cake obtained is dried at 70 ℃ for 7 hours, then extruded, washed twice with pure water, the wet bar is at 100 It was dried at ℃ for 8 hours and calcined at 550 ℃ for 3 hours to obtain the final catalyst B. The composition and main properties are shown in Table 1, and the pore distribution is shown in Table 2.

Example Embodiment

[0037] Example 3
[0038] According to the method of Example 1, according to the composition ratio of the catalyst C in Table 1, nickel nitrate, ammonium metatungstate, aluminum chloride, and zirconium oxychloride were added to the reaction tank to prepare a mixed solution. Take 110 g of ammonium oxalate to prepare a solution with a molar concentration of 1.8 mol/l. Then the mixed solution, ammonium oxalate aqueous solution, and 12% ammonia water as a precipitant are simultaneously added into a reaction tank filled with purified water to form a gel. The gelation pH is 10.0 and the gelation temperature is 60°C. After gelation is over, add 11 grams of β/SAPO-5 mixed molecular sieve slurry (the preparation method of β/SAPO-5 mixed molecular sieve is as in patent CN1834013A example 1, the ratio of microporous to mesoporous molecular sieve is 55:45), and aging for 2 hours , Filter after aging, add 600ml purified water and 6.2g molybdenum trioxide to the filter cake, beat and stir evenly, filter, the filter cake obtained is dried at 120℃ for 1 hour, and then extruded into shape. The wet cake is dried at 130℃ for 3 hours. Calcined at 600°C for 4 hours to obtain the final catalyst C. The composition and main properties are shown in Table 1, and the pore distribution is shown in Table 2.
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Description & Claims & Application Information

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