Catalytic cracking regeneration flue gas sulphur transfer agent and preparation method thereof

A technology of sulfur transfer agent and flue gas regeneration, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve the problems of containing toxic and harmful metal vanadium, difficulty in filtering and washing, and small particle size of products, so as to achieve high-efficiency SOx Adsorption and desorption performance, beneficial to environmental protection, and the effect of reducing waste water discharge

Inactive Publication Date: 2008-05-28
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the divalent metal salt and aluminum salt that the preparation method of anionic clay mainly adopts are as starting material, and this is particularly unfavorable to actual production process: the first, soluble metal salt is more expensive; Small (colloid type), filtration and washing are more difficult; third, the use of salt is usually soluble nitrate, sulfate, which means the presence of a large number of anions, and these anions must be washed (produced with a large amount of nitrate, sulfuric acid) discharge of wastewater such as salt) or discharge as environmentally

Method used

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  • Catalytic cracking regeneration flue gas sulphur transfer agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 480.0g of MgO and 320.0g of pseudo-boehmite mixture into 3000g of deionized water at 80°C under stirring conditions, and continue stirring for 60min to obtain slurry A; 64.0g of ZnCl 2 , 144.4gFeCl 3 ·6H 2 O, 176.3 g CeCl 3 ·6H 2 Add O to 1000g of water to obtain slurry B; add slurry B dropwise to slurry A under strong stirring for 1.5 hours; after the dropwise addition, adjust the pH value of the solution to 10 with saturated NaOH solution and continue stirring After 10 hours, slurry C (solid content: 28.8%) was obtained; slurry C was statically crystallized at 80° C. for 24 hours. Then cool, filter with suction, wash until neutral, dry at 80°C for 12 hours, and roast the obtained sample at 850°C for 3 hours to obtain sulfur transfer agent S1.

Embodiment 2

[0027] Add 24.0g of MgO and 16.0g of pseudo-boehmite (above 300 mesh) into 200g of deionized water at 100°C under stirring conditions, and continue stirring for 30min to obtain slurry A; mix 3.6g of ZnCl2, 7.2g of FeCl 3 ·6H 2 O, 8.8g CeCl 3 ·6H 2 O was added to 40g of water to obtain slurry B; under strong stirring, the slurry B was added dropwise to the slurry A, and the dropping time was 0.5h; after the dropwise addition, the pH value of the solution was adjusted to 9 with a saturated NaOH solution, and the stirring was continued for 4h , to obtain slurry C (solid content: 24.3%); slurry C was statically crystallized at 80°C for 24h. Then cool, filter with suction, wash until neutral, dry at 100°C for 10 hours, and roast the obtained sample at 650°C for 6 hours to obtain sulfur transfer agent S2.

Embodiment 3

[0029] Add 24.0g of MgO and 16.0g of pseudo-boehmite (above 300 mesh) into 200g of deionized water at 100°C under stirring conditions, and continue stirring for 30min to obtain slurry A; add 3.6g of ZnCl 2 , 7.2g FeCl 3 ·6H 2 O, 8.8g CeCl 3 ·6H 2 Add O to 70g of water to obtain slurry B; add slurry B dropwise to slurry A under strong stirring for 0.5h; after the dropwise addition, adjust the pH value of the solution to 12 with saturated NaOH solution and continue stirring for 6h , to obtain slurry C (solid content: 20.0%); slurry C was statically crystallized at 150°C for 24h. Then cool, filter with suction, wash until neutral, dry at 100°C for 6h, and roast the obtained sample at 700°C for 5h to obtain sulfur transfer agent S3.

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Abstract

The invention discloses a catalytic cracking recycling flue gas sulfur transfer agent and a preparation method, and is characterized in that the sulfur transfer agent is obtained by first forming a high built content serosity that takes MgO and pseudo-boehmite as active group component, takes chlorate of zinc, iron, and cerium as oxidation and reduction promoter, and takes sodium hydroxide as general precipitant, and then anion clay is thermally compounded by water with high temperature, finally, the anion clay is filtered, washed, dried, and roasted. The invention has the advantages that: (1) the serosity has high built content and is beneficial to improving compounding efficiency of the anion clay and reducing discharge of waste water; (2) harmful contamination in the waste water can be avoided by adopting the material of the invention to prepare the anion clay, thus being in favor of the environmental protection; (3) the obtained FCC recycling flue gas sulfur transfer agent has highly efficient SO< X > absorbing and desorbing properties.

Description

technical field [0001] The invention relates to catalytic cracking regenerated flue gas sulfur transfer agent and a preparation method thereof, in particular to an anionic clay-type sulfur transfer agent with a hydrotalcite-like structure and a preparation method thereof. Background technique [0002] Fluid Catalytic Cracking (FCC) is one of the main methods for refineries to produce high-value light oils such as gasoline and diesel. FCC units usually consist of a riser and a regenerator. In the production process, cracking catalyst microspheres with cracking activity and heavy raw oil are subjected to high-temperature cracking in the riser reactor to generate light oil and gas products. At the same time, the cracking catalyst is also deactivated due to coking. The deactivated catalyst needs to enter the regenerator to burn at high temperature to regenerate the catalyst. Because the coke on the surface of the catalyst contains a large amount of sulfide, a large amount of S...

Claims

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Application Information

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IPC IPC(8): B01D53/50
Inventor 杨建国赵月昌程文萍刘玲于心玉何鸣元
Owner EAST CHINA NORMAL UNIVERSITY
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