Combined aluminum oxide-based selective hydrodesulfurization catalyst and preparation method thereof

A hydrodesulfurization and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve poor comprehensive performance, poor mechanical strength, and catalytic stability Poor performance and other problems, to achieve the effect of good desulfurization selectivity, small RON loss, and mild reaction process conditions

Active Publication Date: 2009-05-27
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a hydrodesulfurization catalyst with good hydrodesulfurization activity and selectivity, which can effectively improve the existing catalytic cracking gasoline upgrading catalyst mechanism by combining alumina carriers with different pore sizes. Problems of poor strength, poor catalytic stability and poor overall performance, especially suitable for upgrading FCC gasoline

Method used

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  • Combined aluminum oxide-based selective hydrodesulfurization catalyst and preparation method thereof
  • Combined aluminum oxide-based selective hydrodesulfurization catalyst and preparation method thereof
  • Combined aluminum oxide-based selective hydrodesulfurization catalyst and preparation method thereof

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Embodiment 1

[0044] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 12% MoO 3 , 4% MgO, 3% B 2 o 3 , 32% macroporous Al 2 o 3 (The specific surface area is 290m 2 / g, pore volume is 0.85mL / g), 46% pore Al 2 o 3 (The specific surface area is 260m 2 / g, pore volume is 0.35mL / g) catalyst D.

[0045] Weigh 32 grams of macroporous alumina dry rubber powder (water content 24wt%), 46 grams of small hole alumina dry rubber powder (water content 24 wt%), and 2 grams of turnip powder, grind and mix them uniformly, add 3.7 grams of mass concentration 65% nitric acid solution and 34 grams of deionized water, fully kneaded, extruded into a cylindrical shape with a diameter of about 1.5 mm in the extruder, dried at 120°C for about 3 hours, roasted at 520°C for about 5 hours, and cooled and sieved Finally, a combined alumina support about 2 mm long was made.

[0046] Subsequent steps are the same as those of Comparative Example 1, except that the c...

Embodiment 2

[0048] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 12% MoO 3 , 4% MgO, 3% B 2 o 3 , 40% macroporous Al 2 o 3 (The specific surface area is 290m 2 / g, pore volume is 0.85mL / g), 38% pore Al 2 o 3 (The specific surface area is 260m 2 / g, pore volume is 0.35mL / g) catalyst E.

[0049] The preparation method is the same as in Example 1, except that the mass of the macroporous alumina dry rubber powder (water content 24wt%) taken by weighing is 40 grams, and the quality of the small hole alumina dry rubber powder (water content 24 wt%) is 38 grams. , the saturated water absorption of the carrier changed from 0.66mL / g to 0.7mL / g during impregnation.

[0050] Table 1 Catalyst weight composition

[0051]

Embodiment 3

[0053] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 12% MoO 3 , 4% MgO, 3% B 2 o 3 , 46% macroporous Al 2 o 3 (The specific surface area is 290m 2 / g, pore volume is 0.85mL / g), 32% pore Al 2 o 3 (The specific surface area is 260m 2 / g, pore volume of 0.35mL / g) catalyst F.

[0054] The preparation method is the same as in Example 1, except that the mass of the macroporous alumina dry rubber powder (water content 24wt%) taken by weighing is 46 grams, and the quality of the small hole alumina dry rubber powder (water content 24 wt%) is 32 grams. , the saturated water absorption of the carrier changed from 0.66mL / g to 0.74mL / g during impregnation.

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Abstract

The invention relates to a selective hydrodesulfurization catalyst of a combined alumina base and a preparation method thereof. The carrier of the catalyst is compounded by macroporous alumina with a specific surface of 280-300m<2>/g, and a pore volume of 0.8-0.9mL/g as well as fenestral alumina with a specific surface of 250-280m<2>/g, and a pore volume of 0.3-0.4mL/g; the active components of the catalyst are cobalt and molybdenum; the addition agents of the catalyst are magnesium and boron. The preparation method of the catalyst comprises: mixing the macroporous alumina and the fenestral alumina; adding sesbania powder and nitric acid, then carrying out mixing kneading, shaping, drying and baking on the mixture to prepare the compound carrier of the alumina; then loading the addition agents of magnesium and boron as well as the active components of cobalt and molybdenum in sequence, then carrying out drying and baking on the mixture to prepare the catalyst. The catalyst has excellent gasoline selectivity and hydrodesulfurization activity, low loss of product researching octane number, high liquid yield, and the like.

Description

technical field [0001] The invention relates to a hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst containing auxiliary agents magnesium and boron, which uses combined alumina as a carrier and a preparation method thereof. Background technique [0002] In recent years, with the rapid increase in the number of motor vehicles in various cities, the air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling the air quality of large and medium-sized cities has become an urgent problem to be solved to improve the quality of life of people in various countries and ensure the sustainable development of the national economy. one of the major key issues. [0003] In order to control the air pollution caused by automobile exhaust emissions, countries all over the world have formulated strict gasoline standards. The European Parliament legislated in 1998, requiring the impleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/882C10G45/08
Inventor 范煜鲍晓军石冈刘海燕
Owner BC P INC CHINA NAT PETROLEUM CORP
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