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An auxiliary agent for removing catalytic cracking regeneration flue gas pollutants and its preparation method

A technology for catalytic cracking and regenerating flue gas, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of poor continuous activity of auxiliary technology, high investment cost, complicated operation, etc., and achieve hydrothermal stability. Good, long life, good effect of continuous activity

Active Publication Date: 2016-12-07
天津市瑞萦德达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned published patents and documents, the method provided by UP 5,547,648 requires a reactor and a regenerator, which has a large investment cost and complicated operation
Auxiliary technology also has problems such as poor continuous activity and short life

Method used

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  • An auxiliary agent for removing catalytic cracking regeneration flue gas pollutants and its preparation method
  • An auxiliary agent for removing catalytic cracking regeneration flue gas pollutants and its preparation method
  • An auxiliary agent for removing catalytic cracking regeneration flue gas pollutants and its preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The above-mentioned adjuvant for removing catalytic cracking regeneration flue gas pollutants and its preparation method include the following specific steps:

[0032] Add an appropriate amount of deionized water into the beaker, add the accurately weighed rare earth nitrate into it, stir, and raise the temperature to 50-70°C to completely dissolve the rare earth nitrate, add the weighed magnesium aluminum spinel, and stir for 0.5- After 1.5 hours, add the weighed ternary hydrotalcite and pseudo-boehmite sequentially, stir for 1.0-2.5 hours, finally add the binder, and stir for 4.0-10.0 hours to obtain a slurry. The slurry is spray-dried and molded, and the temperature of the spray-drying furnace is controlled at 320-460°C, the outlet temperature is 120-200°C, and the spray pressure is at 30-50 atmospheres. After spray-drying and forming, drying at 120-140°C for 4-10 hours, and roasting at 550-750°C for 3-12 hours to obtain the auxiliary agent carrier.

[0033] Weigh a...

Embodiment 1

[0037] Preparation of the first step multi-effect auxiliary agent carrier

[0038] Add 800gH in a 2-liter three-neck flask 2 O, heat up to 65°C, stir, and add 13.3g La (NO 3 ) 2 .6H 2 O, 44.4gCe(NO 3 ) 2 .6H 2 O, stirred for 0.4 hours to completely dissolve the nitrate; added 55.5g of magnesium-aluminum spinel with a magnesium-aluminum molar ratio of 2:1 (the ignition loss of the spinel was 28.0% by weight) and stirred for 0.8 hours; added 102.9g of zinc-magnesium-aluminum Ternary hydrotalcite (the ignition loss of zinc-magnesium-aluminum ternary hydrotalcite is 32.0% by weight), stirring for 1.0 hour; add 67g pseudo-boehmite (the ignition loss of pseudo-boehmite is 32.0% by weight), and stir for 2.0 hours; Finally add 200.0g aluminum sol (converted into Al 2 o 3 content is 18% by weight), and stirred for 6.0 hours. The slurry was obtained; the slurry was statically crystallized at room temperature for 24 hours, then spray-dried at a furnace temperature of 380°C, an o...

Embodiment 2

[0042] Weigh 50 g of the auxiliary agent carrier prepared in Example 1 and put it into a beaker, then weigh 6.67 g of an aqueous solution with a palladium content of 3000 μg / g in another beaker, add 13.33 g of deionized water, and then, under stirring, batch Add the palladium aqueous solution to the auxiliary carrier, let it stand for 14 hours after the addition, and dry at 120°C for 6 hours. The obtained sample was calcined at 580°C for 6 hours to obtain the auxiliary carrier A2, with an auxiliary noble metal content of 400 μg / g.

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Abstract

The invention discloses an additive of removing catalytic-cracking regenerated flue gas pollutant and a preparation method of the same and especially discloses a multifunctional additive of removing sulfur oxide and nitrogen oxide from the catalytic-cracking regenerated flue gas at the same time and a preparation method of the multifunctional additive. In the invention, magnesium aluminate spinel, a hydrotalcite-like compound and pseudo-boehmite are modified by rare earth elements, and then are added with a binding agent to form high-solid-content slurry liquid. The high-solid-content slurry liquid is subjected to spray moulding, drying and roasting to prepare an additive carrier being high in hydrothermal stability, and then the additive carrier is impregnated with noble metals in a manner of equivalent-volume impregnation. The impregnated carrier is finally subjected to secondary roasting to prepare the additive. The additive is good in hydrothermal stability, is good in activity durability, is long in service life, is free of components, such as vanadium, iron and the like, being harmful to a catalytic-cracking catalyst and is better in performance.

Description

technical field [0001] The invention relates to an additive for removing pollutants from catalytic cracking regeneration flue gas and a preparation method thereof, in particular to a multi-effect additive capable of simultaneously removing sulfur oxides and nitrogen oxides from catalytic cracking regeneration flue gas and a preparation method thereof . Background technique [0002] Fluid catalytic cracking (FCC) is the main secondary processing process of light oil products in refineries. While producing a large amount of high-quality light oil products, a certain amount of sulfur oxides will be emitted from the regeneration flue gas. (hereinafter referred to as SOx) and nitrogen oxides (hereinafter referred to as NOx), which pollute the environment and cause corrosion of the device. It is estimated that the SOx and NOx emissions in the FCC regeneration flue gas account for about 6%-7% and 10% of the SOx and NOx emissions in the air. The main methods to reduce SOx and NOx ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/60B01D53/62
CPCY02A50/20
Inventor 张伟
Owner 天津市瑞萦德达环保科技有限公司