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Method for preparing high effective sulfur transfer agent for catalytic cracking fume

A technology of sulfur transfer agent and catalytic cracking, which is applied in catalytic cracking, chemical instruments and methods, cracking, etc., and can solve problems such as poor wear resistance and low desulfurization efficiency

Inactive Publication Date: 2006-02-01
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some domestic research institutions 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 (CN1101247C, CN1122702C, CN1142015C, etc.)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1 Preparation of zinc magnesium aluminum cerium hydrotalcite (ZnMgAlCe-LDH)

[0016] Add 500 g of H to a 1 L three-necked flask 2 O, 24.8 g NaOH and 10.9 g Na 2 CO 3 , after stirring evenly at 70°C, dropwise add 350g H 2 O, 11.9g Zn(NO 3 ) 2 , 30.7g Mg(NO 3 ) 2 , 14.7g Al 2 (NO 3 ) 3 , 4.6g Ce(NO 3 ) 3 solution, the dropwise addition time is 0.5h, after the dropwise addition, continue to stir to nucleate and crystallize for 15h. Then cool, filter with suction, wash until neutral, dry in vacuum at 70°C for 7 hours to obtain hydrotalcite-like, and roast at 450°C to obtain product A1.

[0017] Step 2 Vanadium impregnation - preparation of ZnMgAlCe hydrotalcite (V / ZnMgAlCe-LDH) product

[0018] 0.25g NH 4 VO 3 Soluble in 6.8g H 2 O, the concentration of the solution should be such that the pH of the solution is between 6 and 8 to ensure that VO 3 - Stable in solution. The solution was thoroughly mixed with 9.7 g of cerium-containing hydrotalcite A1, ...

Embodiment 2

[0022] Step 1 Preparation of zinc magnesium aluminum cerium hydrotalcite (ZnMgAlCe-LDH)

[0023] Add 500 g of H to a 1 L three-necked flask 2 O, 24.8g NaOH and 11.0g Na 2 CO 3 , after stirring evenly at 75°C, dropwise add 350g H 2 O, 14.9g Zn(NO 3 ) 2 , 25.6g Mg(NO 3 ) 2 , 18.5g Al 2 (NO 3 ) 3 , 4.6g Ce(NO 3 ) 3 solution, the dropwise addition time is 0.5h, after the dropwise addition, continue to stir to nucleate and crystallize for 15h. Then cool, filter with suction, wash until neutral, and dry in vacuum at 80°C for 6 hours to obtain hydrotalcite-like A2.

[0024]Step 2 Vanadium impregnation - preparation of ZnMgAlCe hydrotalcite (V / ZnMgAlCe-LDH) product

[0025] Method is with the 2nd step of embodiment 1, obtains product B2.

[0026] Step 3 Molding of sulfur transfer agent

[0027] Method is the same as the 3rd step of embodiment 1, obtains sulfur transfer agent S502.

Embodiment 3

[0029] Step 1 Preparation of zinc magnesium aluminum cerium hydrotalcite (ZnMgAlCe-LDH)

[0030] Add 500 g of H to a 1 L three-necked flask 2 O, 24.8g NaOH and 11.0g Na 2 CO 3 , after stirring evenly at 70°C, dropwise add 350g H 2 O, 8.5g Zn(NO 3 ) 2 , 29.2g Mg(NO 3 ) 2 , 21.1g Al 2 (NO 3 ) 3 , 3.1g Ce(NO 3 ) 3 solution, the dropwise addition time is 0.5h, after the dropwise addition, continue to stir for nucleation and crystallization for 13h. Then cool, filter with suction, wash until neutral, and dry in vacuum at 90°C for 6 hours to obtain hydrotalcite-like A3.

[0031] Step 2 Vanadium impregnation - preparation of ZnMgAlCe hydrotalcite (V / ZnMgAlCe-LDH) product

[0032] Method is with the 2nd step of embodiment 1, obtains product B3.

[0033] Step 3 Molding of sulfur transfer agent

[0034] Method is the same as the 3rd step of embodiment 1, obtains sulfur transfer agent S503.

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PUM

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Abstract

A process for preparing the efficient sulfur transferring agent used for the catalytic cracking of fume includes such steps as preparing ZnMgAlCe hydrotalcite from the active components (Zn, Mg and Al) and assistant (Ce and V) by codeposition method, preparing V-dipped ZnMgAlCo hydrotalcite by anionic exchange method, proportionally mixing it with kaolin and Al sol, grinding, vacuum drying and calcining. Its advantages are high SOx adsorptivity and desorptivity and high mechanical strength.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency sulfur transfer agent for catalytic cracking flue gas, specifically, a method for preparing a sulfur transfer agent with zinc-magnesium-aluminum-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 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 FCC 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 Almost no equipment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50C10G11/00
Inventor 杨建国于心玉吴海虹刘月明路勇刘彩华梁学正高珊段雪
Owner EAST CHINA NORMAL UNIV
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