Preparation method of catalytic cracking flue gas desulfurization agent

A desulfurization aid and catalytic cracking technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low transfer rate, low oxidation activity and reduction activity, and achieve high transfer rate and improved High reactivity and desulfurization activity

Active Publication Date: 2015-04-01
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium active component and the cerium active component in the desulfurization aid prepared by the above method are prone to mutual wrapping, and the active center is covered, so the above desulfuriz

Method used

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  • Preparation method of catalytic cracking flue gas desulfurization agent

Examples

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Example Embodiment

[0024] Example 1

[0025] This embodiment provides a catalytic cracking flue gas desulfurization aid, which uses alumina as a carrier, magnesium and cerium compounds as active components, based on the weight of the catalyst, the content of magnesium oxide is 35wt%, and the content of cerium oxide is 20wt% %, the rest is alumina.

[0026] The catalytic cracking flue gas desulfurization aid is prepared by the following method:

[0027] (1) Fully disperse 35 parts by weight of the granular carrier pseudo-boehmite in 100ml of deionized water, add 37% hydrochloric acid by mass concentration to adjust the pH to 8 to obtain the first slurry; use 30 parts by weight of cerium nitrate in 50ml After the deionized water is dissolved, acid is added to adjust the pH to 7 to obtain a second slurry;

[0028] (2) Mix the first slurry and the second slurry and add 20 parts by weight of aluminum sol, mix them uniformly, dry at 120°C for 2 hours and roast at 600°C for 8 hours to obtain a semi-finished p...

Example Embodiment

[0030] Example 2

[0031] This embodiment provides a catalytic cracking flue gas desulfurization aid, which uses alumina as a carrier, and a compound of magnesium, cerium, barium, and manganese as active components. Based on the weight of the catalyst, the content of magnesium oxide is 35wt%. The content of is 15wt%, the content of barium oxide is 2wt%, the content of manganese oxide is 5wt%, and the rest is alumina.

[0032] The catalytic cracking flue gas desulfurization aid is prepared by the following method:

[0033] (1) Fully disperse 35 parts by weight of granular carrier SB powder (SB powder provided by Beijing Asia Pacific Aohua Chemical Auxiliary Co., Ltd.) in 100 ml of deionized water, and add 37% hydrochloric acid with a mass concentration of hydrochloric acid to adjust the pH to 8 to obtain The first slurry; after dissolving 22 parts by weight of cerium chloride in 50ml of deionized water, adding acid to adjust the pH to 7 to obtain a second slurry;

[0034] (2) Mix the ...

Example Embodiment

[0036] Example 3

[0037] This embodiment provides a catalytic cracking flue gas desulfurization aid, which uses alumina as a carrier, and a compound of magnesium, cerium, barium, and manganese as active components. Based on the weight of the catalyst, the content of magnesium oxide is 35wt%. The content of is 15wt%, the content of barium oxide is 2wt%, the content of manganese oxide is 5wt%, and the rest is alumina.

[0038] The catalytic cracking flue gas desulfurization aid is prepared by the following method:

[0039] (1) Fully disperse 30 parts by weight of granular carrier activated alumina powder in 100ml of deionized water, and add 37% hydrochloric acid with a mass concentration of 37% to adjust the pH to 8 to obtain the first slurry; use 25 parts by weight of cerium sulfate in 50ml After the deionized water is dissolved, acid is added to adjust the pH to 7 to obtain a second slurry;

[0040] (2) Mixing the first slurry and the second slurry, adding 15 parts by weight of alum...

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Abstract

The invention provides a preparation method of a catalytic cracking flue gas desulfurization agent. The preparation method provided by the invention comprises the following steps: dipping cerium ion active components on a granular carrier under a certain condition, adding alumina sol and/or silica sol, drying, and roasting to obtain a semi-finished product, wherein the active components can be better dispersed on the carrier; simultaneously, more acid centres can be formed in the carrier; and the reaction activity is increased; and then, dipping magnesium ion active components on the semi-finished product, drying, and roasting to obtain the desulfurization agent. According to the invention, the cerium ion active components are dipped at first; the magnesium ion active components are dipped after alumina sol and/or silica sol are/is added; therefore, the cerium active components are sufficiently dispersed in an aluminium oxide porous channel; the magnesium active components form a clad layer outside the cerium active components; in the event of desulfurizing, desulfurization reaction is carried out in different levels; the desulfurization activity is higher; the transfer rate of SOx in flue gas is high; and the desulfurization agent is long in service life.

Description

technical field [0001] The invention relates to a preparation method of catalytic cracking flue gas desulfurization additive, which belongs to the technical field of chemical catalysts. Background technique [0002] Catalytic cracking is one of the important processes of petroleum secondary processing. In the process of catalytic cracking, the catalyst is circulated between the reactor and the regenerator. When leaving the reactor, the catalyst contains about 3-10wt% coke. At this time, the deposited coke needs to be burned off in the regenerator with the help of oxygen in the air to restore the catalytic activity of the catalyst and realize the regeneration of the catalyst. [0003] As the content of sulfur and nitrogen heteroatoms in crude oil increases, the sedimentary coke also contains sulfur and nitrogen. When the catalyst is regenerated in the regenerator under oxygen-enriched conditions, the deposited coke and oxygen undergo a combustion reaction to generate regener...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J23/34B01D53/50B01D53/86
Inventor 陈玲玲单红飞刘聪
Owner SHENYANG SANJUKAITE CATALYST
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