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 comprehensive performance, poor catalytic stability, poor mechanical strength, etc., and achieve product selection The effect of permanent hydrodesulfurization is good, the reaction process conditions are mild, and the effect of RON loss is small

Active Publication Date: 2011-03-16
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

[0043] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 14% MoO 3 , 7% MgO, 27% MCM-41 (silicon-aluminum molar ratio is 75)-49% Al 2 o 3 Catalyst A.

[0044] Take by weighing SB (pseudo-boehmite) powder (produced by Condea, Germany, water content 26wt%) 43.9 grams, MCM-41 molecular sieve (specific surface area is 800m 2 / g) 17.9 grams, 2 grams of asparagus powder, grind and mix it evenly, add 3.7 grams of nitric acid solution and 30 grams of deionized water with a mass concentration of 65%, fully knead and extrude it into a diameter of about 1.5 mm in an extruder Cylindrical, dried at 120°C for about 3 hours, roasted at 520°C for about 5 hours, cooled and sieved to make MCM-41 / Al about 2mm long 2 o 3 combination.

[0045] Then 40 grams of the above MCM-41 / Al 2 o 3 The composition was impregnated in 48mL of a solution containing 2.8g of citric acid, stirred with a glass rod for about 10 minutes, aged at room temperature for ...

Embodiment 2

[0048] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 14% MoO 3 , 7% MgO, 27% SBA-15 (silicon-aluminum molar ratio is 75)-49% Al 2 o 3 Catalyst B.

[0049] 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 75, and the specific surface area is 780m 2 / g).

Embodiment 3

[0051] The preparation of this embodiment includes: based on the total weight of the catalyst, 3% CoO, 14% MoO 3 , 7% MgO, 27% SBA-15 (silicon-aluminum molar ratio is 60)-49% Al 2 o 3 Catalyst C.

[0052] 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 andmolybdenum, 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 present invention relates to a hydrodesulfurization catalyst and its preparation method, in particular to a selective hydrodesulfurization catalyst using an organic acid and additive-modified alumina and silica-alumina mesoporous molecular sieve composition as a carrier and its preparation method. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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