Beta zeolite-containing ultradeep hydrodesulfurization catalyst and preparation method thereof

A desulfurization catalyst and deep hydrogenation technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of reduced reaction rate, difficult access to active centers, difficult removal, etc., to achieve pore size increase, Reduce the cost of preparation and improve the effect of pore structure

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 and content of metals and the coordination and cooperation between different metals. How to make the catalyst have a reasonable pore structure and a high content of active metal components to fully play their role, and how to make the acidic components in the catalyst Combined with active metals reasonably, how to make the catalyst have better hydrogenation activity at the same metal content has not been involved

Method used

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  • Beta zeolite-containing ultradeep hydrodesulfurization catalyst and preparation method thereof
  • Beta zeolite-containing ultradeep hydrodesulfurization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1000 mL of water to the dissolution tank, add 43 g of nickel chloride to dissolve, 36.5 g of ammonium metatungstate to dissolve, and 357 ml of aluminum chloride solution, and mix them to form a 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 is 8.0 and the gelation temperature is 60°C. After gelation, 10 grams of β zeolite slurry was added and aged for 2 hours. After aging, filter, add 600ml purified water and 8.4g 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...

Embodiment 2

[0033] According to the method of Example 1, according to the composition ratio of the catalyst B in Table 2, aluminum chloride, nickel chloride, sodium tungstate, and water glass were added to the dissolving tank, and the solution was mixed uniformly. 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 9% ammonia water as a precipitating agent are simultaneously added into a reaction tank filled with purified water to form a gel. The gelation pH is 10 and the gelation temperature is 80°C. After gelation, add 14 grams of β zeolite slurry, age for 3 hours, filter after aging, add 600ml of purified water and 7.2g of molybdenum trioxide to the filter cake, beat the slurry and stir evenly, filter, and dry the filter cake at 70°C for 7 hours. Then the bar was extruded and washed twice with clean water. The wet bar was dried at 100°C for 6 hours and calcined at 550°C for ...

Embodiment 3

[0035] According to the method of Example 1, add nickel nitrate, ammonium metatungstate, aluminum chloride, phosphoric acid, and zirconium oxychloride to the dissolution tank according to the component content ratio of catalyst C in Table 1, and mix them to form a solution . Take 120 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 precipitating agent were simultaneously added into a reaction tank filled with purified water to form a gel. The gelation pH was 11.0 and the gelation temperature was 60°C. After gelation, add 10 grams of β zeolite slurry, age for 2 hours, filter after aging, add 600ml purified water and 9.5g molybdenum trioxide to the filter cake, beat the slurry and stir well, filter, and dry the filter cake at 120°C for 1 hour. Then the bar was extruded into shape, the wet bar was dried at 130°C for 3 hours, and calcined at 600°C for 3 hours...

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Abstract

The invention discloses a bulk phase deep hydrodesulfurization catalyst and a preparation method thereof. The components of the catalyst comprise a composite oxide (NixWyO2), MoO3, aluminum oxide and beta zeolite. The method comprises: adding a proper amount of water soluble nitrogen compound in a precipitation process of Ni, W and Al, gelatinizing, adding beta zeolite size, aging, pulping with MoO3, forming and activating. The method improves the porous structure of the catalyst, makes more metal active spots exposed from the surface of the catalyst, improves the utilization rate of active metals, and makes beta zeolite and metal having hydrogenation activity uniformly and fully contacted and better cooperated to realize ultradeep hydrodesulfurization of diesel. In addition, the increasein the aperture and pore volume of the catalyst allows a Ni-W active center to be fully utilized and molecules with complex large structures to contact the active center more easily, and the effect is more obvious particularly when distillate with high-macromolecule content.

Description

Technical field [0001] The invention relates to a distillate oil hydrodesulfurization catalyst and a preparation method thereof, in particular to a bulk distillate oil deep hydrodesulfurization catalyst containing beta zeolite and a preparation method thereof. Background technique [0002] Because the combustion of sulfur-containing compounds in fuel will cause serious harm to the world's environment and society, the standards for clean fuels formulated by countries all over the world have greatly increased the limit on sulfur content. The U.S. Environmental Protection Agency has reduced the sulfur content of diesel to 15 ppm in June 2006. Among the various desulfurization technologies for diesel, the most mature is the hydrodesulfurization technology. Methods to achieve deep desulfurization include the development of new reactors and new catalysts. Kinetic studies have shown that if the sulfur content of diesel is reduced from 500 ppm to less than 15 ppm, the volume of the rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/78B01J35/10B01J37/00C10G45/12
Inventor 王海涛刘东香徐学军冯小萍王继锋
Owner CHINA PETROLEUM & CHEM CORP
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