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Preparation method of sulfur transfer agent for FCC regenerated flue gas

A technology of fluidized catalytic cracking and flue gas regeneration, which is applied in the direction of catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc. It can solve the problems of poor wear resistance and low desulfurization efficiency, achieve good mechanical strength, reduce Effects of NOx content, efficient SOx adsorption and desorption performance

Inactive Publication Date: 2009-04-15
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some domestic research institutes and oil refineries have developed sulfur transfer agents with magnesium-aluminum spinel as the main component, but there are disadvantages such as low desulfurization efficiency and poor wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1 Preparation of MgAlZnFeCe-HTL hydrotalcite-like

[0024] Add 5 L of H to a 10 L three-necked flask 2 O, 153.0g NaOH and 36.0g NaOH 2 CO 3 , after stirring evenly at 60°C, dropwise add 3.5L water, 307.0g Mg(NO 3 ) 2 ·6H 2 O, 147.0gAl(NO 3 ) 3 9H 2 O, 21.4g Fe(NO 3 ) 3 9H 2 O, 15.6g Zn(NO 3 ) 2 ·6H 2 O and 4.2gCe(NO 3 ) 3 ·6H 2 O solution, the dropwise addition time is 0.5h, continue to stir for 15h after the dropwise addition, nucleation and crystallization at 85°C. Then cool, filter with suction, wash to neutrality, and dry at 100°C for 7 hours to obtain Al, a hydrotalcite-like product.

[0025] Step 2 Sulfur Transfer Agent Molding

[0026] Get 60.0g Al and 203mL deionized water and join in the reactor, add 27.3g kaolin (commercial product of Suzhou kaolin company, solid content 73.3%) and 10.0g LaUSY, then add 100.0g aluminum sol (10% solid content , self-made) beating, stirring for 30 minutes, spray drying to obtain sulfur transfer agent S1. ...

Embodiment 2

[0028] Step 1 Preparation of MgAlZnFeCe-HTL hydrotalcite-like

[0029] Add 5 L of H to a 10 L three-necked flask 2 O, 542.0g ammonia water (25%) and 33.7g (NH 4 ) 2 CO 3 , after stirring evenly at 70°C, dropwise add 3.5L water, 307.0g Mg(NO 3 ) 2 ·6H 2 O, 147.0g Al 2 (NO 3 ) 3 9H 2 O,, 21.4g Fe(NO 3 ) 3 9H 2 O, 15.6g Zn(NO 3 ) 2 ·6H 2 O and 16.9gCe(NO 3 ) 3 ·6H 2 O, the dropwise addition time is 0.5h, continue stirring for 15h after the dropwise addition, nucleation and crystallization at 90°C. Then cool, filter with suction, wash until neutral, and dry at 80°C for 7 hours to obtain the hydrotalcite-like product A2.

[0030]Step 2 Sulfur Transfer Agent Molding

[0031] With the 2nd step of embodiment 1, obtain sulfur transfer agent S2.

Embodiment 3

[0033] Step 1 Preparation of MgAlZnFeCe-HTL hydrotalcite-like

[0034] Add 5 L of H to a 10 L three-necked flask 2 O, 156.6g NaOH and 39.0g Na 2 CO 3 , after stirring evenly at 90°C, dropwise add 3.5L of water, 243.4g of MgCl 2 ·6H 2 O, 96.2g AlCl 3 ·6H 2 O, 14.3g FeCl 3 ·6H 2 O, 7.1g ZnCl 2 and 25.3g Ce(NO 3 ) 3 ·6H 2 O, the dropwise addition time is 0.5h, continue stirring for 15h after the dropwise addition, nucleation and crystallization at 90°C. Then cool, filter with suction, wash to neutrality, and dry at 120°C for 7 hours to obtain the hydrotalcite-like product A3.

[0035] Step 2 Sulfur Transfer Agent Molding

[0036] With the 2nd step of embodiment 1, obtain sulfur transfer agent S3.

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PUM

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Abstract

The invention relates to a method for preparing fluid catalyst crack regenerate smoke sulfur transfer agent, wherein it uses co-precipitation method to prepare MgAlZnFeCe-HTL hydrotalcite; mixes 60 deals MgAlZnFeCe-HTL product, 20 deals caoline, 10 deals rare-earth Y, 100 deals aluminum gel (10% solid), and 210 deals chemical water, beating, atomizing and drying. The inventive transfer agent has high-effect SOX adsorption and high mechanical strength, while it can reduce the NOx content of smoke.

Description

technical field [0001] The invention relates to a preparation method of a flue gas purifying agent, in particular to a method for preparing a fluidized catalytic cracking regenerated flue gas sulfur transfer agent with magnesium-aluminum-zinc-iron-cerium hydrotalcite as the main component. Background technique [0002] Fluid Catalytic Cracking (FCC) is one of the main methods for producing gasoline and diesel in refinery, SO in FCC regeneration flue gas X The emissions of SO in the air account for about X 6-7% of the total emissions. SOx not only seriously pollutes the environment and endangers human health, but also SO X The interaction with the water in the regenerated flue gas increases the corrosion of equipment such as FCC regenerators and three-rotation. SO reduction in FCCC regenerators X The main methods of emission are: 1. Flue gas washing; 2. Hydrodesulfurization of raw oil; 3. Catalytic deSO X (sulfur transfer agent). SO removal due to catalytic method X Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01J23/83B01J27/00B01J37/02C10G11/18
Inventor 杨建国于心玉程文萍刘玲赵月昌刘彩华何鸣元
Owner EAST CHINA NORMAL UNIV
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