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Selective hydrodesulfurization catalyst containing mesoporous molecular screen and preparation method thereof

A mesoporous molecular sieve, hydrodesulfurization technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor mechanical strength, poor comprehensive performance, poor catalytic stability, etc., and achieve RON loss. Small size, good product selective hydrodesulfurization effect, and moderate 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

[0010] 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, through the combination of alumina carrier and silica-alumina mesoporous molecular sieve and the modification of additive magnesium, the catalyst can be It has a suitable pore structure and a good dispersion of active components, thereby effectively improving the problems of poor mechanical strength, poor catalytic stability and poor overall performance of existing catalytic cracking gasoline upgrading catalysts, especially suitable for upgrading FCC gasoline

Method used

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  • Selective hydrodesulfurization catalyst containing mesoporous molecular screen and preparation method thereof
  • Selective hydrodesulfurization catalyst containing mesoporous molecular screen and preparation method thereof
  • Selective hydrodesulfurization catalyst containing mesoporous molecular screen and preparation method thereof

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Embodiment 1

[0036] The preparation in this embodiment includes: 3% CoO, 14% MoO based on the total weight of the catalyst 3 , 7% MgO, 27% MCM-41 (the molar ratio of silicon to aluminum is 75)—49% Al 2 O 3 的catalyst A.

[0037] Weigh 43.9 grams of SB (pseudo-boehmite) powder (produced by Condea, Germany, with water content of 26wt%), MCM-41 molecular sieve (specific surface area of ​​800m) with a silicon-to-aluminum molar ratio of 75 2 / g) 17.9 grams, 2 grams of Sesbania powder, grind and mix them evenly, add 3.7 grams of nitric acid solution with a mass concentration of 65% and 30 grams of deionized water, fully kneaded and squeeze into an extruder to form a diameter of about 1.5 mm The cylindrical shape is dried at 120°C for about 3 hours, calcined at 520°C for about 5 hours, and then sieved after cooling to produce MCM-41 / Al with a length of about 2mm. 2 O 3 combination.

[0038] Then add 40 grams of the above MCM-41 / Al 2 O 3 The composition was immersed in 48 mL of a solution containing 2....

Embodiment 2

[0041] The preparation in this embodiment includes: 3% CoO, 14% MoO based on the total weight of the catalyst 3 , 7% MgO, 27% SBA-15 (molar ratio of silicon to aluminum is 75)—49% Al 2 O 3 的catalyst B.

[0042] The preparation method is the same as in Example 1, except that the MCM-41 (molar ratio of silicon to aluminum is 75) in the carrier is changed to SBA-15 (molar ratio of silicon to aluminum is 75, and the specific surface area is 780m 2 / g).

Embodiment 3

[0044] The preparation in this embodiment includes: 3% CoO, 14% MoO based on the total weight of the catalyst 3 , 7% MgO, 27% SBA-15 (the molar ratio of silicon to aluminum is 60)—49% Al 2 O 3 的catalyst C.

[0045] The preparation method is the same as in Example 1, except that the MCM-41 in the carrier (the molar ratio of silicon to aluminum is 75) is changed to SBA-15 (the molar ratio of silicon to aluminum is 60, and the specific surface area is 760m. 2 / g).

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Abstract

The invention relates to a selective hydrodesulfurization catalyst and a preparation method thereof. The catalyst takes alumina and a silicon-aluminum mesoporous molecular sieve containing an ordered mesoporous structure as carriers, takes cobalt and molybdenum as the active components and takes magnesium as an addition agent. The preparation method of the catalyst comprises: mixing the alumina and the silicon-aluminum mesoporous molecular sieve; adding sesbania powder and nitric acid, then carrying out mixing kneading, shaping, drying and baking on the mixture to prepare the compound of the alumina and the silicon-aluminum mesoporous molecular sieve; then the compound is treated by organic acid and loaded with the addition agent of magnesium as well as the active components of cobalt and molybdenum, then, aging, drying and baking are carried out on the mixture to prepare the catalyst. The catalyst shows excellent gasoline selectivity and hydrodesulfurization activity, low loss of product researching octane number and high liquid yield by inducing the porous structure and acidity of the modulating catalyst of the ordered mesoporous molecular sieve, inducing the acidity of a magnesium modulating catalyst and inducing the manual effect between an organic acid modulating carrier and the active components.

Description

Technical field [0001] The invention relates to a hydrodesulfurization catalyst and a preparation method thereof, in particular to a selective hydrodesulfurization catalyst using an alumina and silica-alumina mesoporous molecular sieve composition modified by an organic acid and an auxiliary agent as a carrier and a preparation method thereof method. Background technique [0002] In recent years, with the rapid increase in the number of motor vehicles in cities in various countries, the problem of air pollution caused by vehicle exhaust emissions has become increasingly serious. Controlling air quality in large and medium-sized cities has become an urgent solution to improve the quality of life of the people of all 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 Eur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/064B01J29/076C10G45/12
Inventor 范煜鲍晓军石冈刘海燕
Owner BC P INC CHINA NAT PETROLEUM CORP
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