Catalytic cracking regenerated flue gas sulfur transfer agent and preparation method thereof

A technology for regenerating flue gas and sulfur transfer agent, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of increased raw material cost, high toxicity, expensive rare earth cerium, etc., and achieve high SOx adsorption. Ability, simple preparation and operation method, good regeneration performance

Inactive Publication Date: 2013-06-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the addition of some metals such as vanadium increases the adsorption capacity and adsorption rate, it is easy to reduce the activity of catalytic cracking catalysts and has high toxicity; the price of rare earth cerium is relatively expensive, which increases the cost of raw materials, which is not conducive to the promotion of sulfur transfer agents.

Method used

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  • Catalytic cracking regenerated flue gas sulfur transfer agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] 43.1gMg(NO 3 ) 2 ·6H 2 O, 25.5gAl(NO 3 ) 3 9H 2 O, 4.8gFe(NO 3 ) 3 9H 2 O, 14.3gMnCl 2 4H 2 O and 200.0gH 2 O mixed and stirred to dissolve to form solution A; 26.2gNaOH, 4.6gNa 2 CO 3 and 200.0gH 2 O was mixed and stirred to dissolve to form solution B; under the condition of 80°C water bath, solution A was added dropwise to solution B with continuous stirring, the dropping time was 1 hour, and the dropping rate was about 3.3ml / min. Continue to stir for 3h after the dropwise addition, and crystallize at 80°C for 18h, keep the pH of the solution at 13, then cool, filter with suction, wash with deionized water until neutral, dry at 100°C for 6h, and roast at 700°C for 6h to obtain sulfur transfer Agent A.

Embodiment 2

[0038] 43.1gMg(NO 3 ) 2 ·6H 2 O, 25.5gAl(NO 3 ) 3 9H 2 O, 4.8gFe(NO 3 ) 3 9H 2 O, 14.3gMnCl 2 4H 2 O and 200.0gH 2 O mixed and stirred to dissolve to form solution A; 36.7gKOH, 4.2g (NH 4 ) 2 CO 3 and 200.0gH 2 O was mixed and stirred to dissolve to form solution B; under the condition of 80°C water bath, solution A was added dropwise to solution B with continuous stirring, the dropping time was 1 hour, and the dropping rate was about 3.3ml / min. Continue to stir for 3h after the dropwise addition, and crystallize at 80°C for 18h, keep the pH of the solution at 13, then cool, filter with suction, wash with deionized water until neutral, dry at 100°C for 6h, and roast at 700°C for 6h to obtain sulfur transfer Agent B.

Embodiment 3

[0040] 34.1gMgCl 2 ·6H 2 O, 16.4g AlCl 3 ·6H 2 O, 3.2gFeCl 3 ·6H 2 O, 14.3gMnCl 2 4H 2 O and 200.0gH 2 O mixed and stirred to dissolve to form solution A; 26.2gNaOH, 4.6gNa 2 CO 3 and 200.0gH 2 O was mixed and stirred to dissolve to form solution B; under the condition of 80°C water bath, solution A was added dropwise to solution B with continuous stirring, the dropping time was 1 hour, and the dropping rate was about 3.3ml / min. Continue to stir for 3h after the dropwise addition, and crystallize at 80°C for 18h, keep the pH of the solution at 13, then cool, filter with suction, wash with deionized water until neutral, dry at 100°C for 6h, and roast at 700°C for 6h to obtain sulfur transfer Agent C.

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Abstract

The invention relates to a catalytic cracking regenerated flue gas sulfur transfer agent and a preparation method thereof. The preparation method comprises the following steps of: mixing mixed solution containing magnesium salt, aluminum salt, iron salt and manganese salt and mixed solution containing carbonate and base to obtain a MnMgAlFe hydrotalcite compound; and drying and roasting the hydrotalcite compound serving as a precursor to form the composite manganese, magnesium, aluminum and iron oxide sulfur transfer agent with spinel structure. The sulfur transfer agent not only has high SOxadsorption capacity, but also shows excellent regeneration performance.

Description

technical field [0001] The invention relates to a sulfur-containing flue gas purifying agent in crude oil processing and production and a preparation method thereof, in particular to a catalytic cracking regenerated flue gas sulfur transfer agent and a preparation method thereof. technical background [0002] Fluid catalytic cracking (FCC) is by far the main process for the production of gasoline, light diesel oil and liquefied petroleum gas in the petroleum industry. Generally speaking, 45%-55% of the sulfur in the raw material is converted into H in the catalytic cracking reactor 2 S, 35%-45% of sulfur enters the liquid product, 5%-15% of sulfur is deposited on the coke, and enters the regenerator to be oxidized into SOx (SOx contains more than 90% SO 2 , less than 10% SO 3 ), SO in flue gas 2 The content is about 150-3000uL / L, which is discharged into the atmosphere through the flue gas, which directly leads to the formation of acid rain and the destruction of the ozone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01J23/889B01J20/08B01J20/30B01D53/50
Inventor 苑世领康海涛张丛筠吕凯
Owner SHANDONG UNIV
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