Environment-friendly energy-saving high-conversion-ratio rare-earth catalyst and preparation method thereof

A rare earth catalyst, high conversion rate technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high wear rate and high cost of tail gas treatment, Achieve the effects of prolonging the service life, solving the exhaust emission problem, and stabilizing the lattice structure

Active Publication Date: 2018-05-01
南京云高新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the defects of high attrition rate and high cost of tail gas treatment in the catalyst in the prior art, the present invention provides an environment-friendly, energy-saving, high-conversion rare earth catalyst and its preparation method

Method used

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  • Environment-friendly energy-saving high-conversion-ratio rare-earth catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 2.5gLa(NO 3 ) 3 ﹒ 6H 2 O, 2.5gCe(NO 3 ) 3 ﹒ 6H 2 O, 2.5gNd(NO 3 ) 3 ﹒ 6H 2 O, 2.5gPr(NO 3 ) 3 ﹒ 6H 2 O was added to 400mL of distilled water, 150g of refined diatomaceous earth was added after complete dissolution, stirred for 30min, vacuum steamed at 60℃ for 12h, roasted at 400℃ for 4h to obtain material b; 2 O 5 , 10g KOH is fully dissolved in the same reaction tank, after mixing evenly, 2.5g organic polymer compound (polyethylene glycol 8000) and 2.5g surfactant (hexadecyltrimethylammonium bromide) are added to fully react to obtain KVO 3 Or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), react to form a uniform solution, add it to material b, and add 10gCs 2 SO 4 , 2.5g of thiosulfate, 2.5g of sodium sulfate, 2.5mL of phosphoric acid (mass concentration of 85%), 7.5 sulfur (fineness of 20 mesh) into the mill for full mixing for 0.5 hours. The mixed and milled materials are mechanically shaped, and then dried at 150°C to mak...

Embodiment 2

[0039] Weigh 5gLa(NO 3 ) 3 ﹒ 6H 2 O, 5gCe(NO 3 ) 3 ﹒ 6H 2 O, 5gNd(NO 3 ) 3 ﹒ 6H 2 O, 5gPr(NO 3 ) 3 ﹒ 6H 2 O was added to 400mL of distilled water, 150g of refined diatomaceous earth was added after complete dissolution, stirred for 30min, vacuum steamed at 60℃ for 12h, roasted at 400℃ for 4h to obtain material b; 2 O 5 , 10g KOH is fully dissolved in the same reaction tank, after mixing evenly, 2.5g organic polymer compound (polyvinylpyrrolidone PVPK15) and 2.5g surfactant (hexadecyltrimethylammonium chloride) are added to fully react to obtain KVO 3 Or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), react to form a uniform solution, add it to material b, and add 10gCs 2 SO 4 , 2.5g of thiosulfate, 2.5g of sodium sulfate, 2.5mL of phosphoric acid (mass concentration of 85%), 7.5 sulfur (fineness of 20 mesh) into the mill for full mixing for 0.5 hours. The mixed and milled materials are mechanically shaped, and then dried at 150°C so that th...

Embodiment 3

[0041] Weigh 7.5gLa(NO 3 ) 3 ﹒ 6H 2 O, 7.5gCe(NO 3 ) 3 ﹒ 6H 2 O, 7.5gNd(NO 3 ) 3 ﹒ 6H 2 O, 7.5gPr(NO 3 ) 3 ﹒ 6H 2 O was added to 400mL of distilled water, 150g of refined diatomaceous earth was added after complete dissolution, stirred for 30min, vacuum steamed at 60℃ for 12h, roasted at 400℃ for 4h to obtain material b; 2 O 5 , 10g KOH is fully dissolved in the same reaction tank, after mixing evenly, 2.5g organic polymer compound (polystyrene GH-660) and 2.5g surfactant (sodium dodecylbenzene sulfonate) are added to fully react to obtain KVO 3 Or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), react to form a uniform solution, add it to material b, and add 10gCs 2 SO 4 , 2.5g of thiosulfate, 2.5g of sodium sulfate, 2.5mL of phosphoric acid (mass concentration of 85%), 7.5 sulfur (fineness of 20 mesh) into the mill for full mixing for 0.5 hours. The mixed and milled materials are mechanically shaped, and then dried at 150°C so that the moi...

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Abstract

The invention discloses an environment-friendly energy-saving high-conversion-ratio rare-earth catalyst and a preparation method thereof. The environment-friendly energy-saving high-conversion-ratio rare-earth catalyst is prepared from the following raw materials in percentage by mass: 0.01-10% of a lanthanum-containing compound, 0.01-10% of a cerium-containing compound, 0.01-10% of a neodymium-containing compound, 0.01-10% of a praseodymium-containing compound, 3-15% of V2O5, 1-3% of thiosulfate, 1-15% of a caesium-containing compound, 1-5% of a surfactant, 1-5% of an organic high-molecular compound, 1-30% of hydroxide, 5-30% of diluted sulphuric acid, 0.1-10% of anhydrous sodium sulphate, 0.1-7% of phosphoric acid, 1-15% of sulfur and the balance of diatomite. The material components cooperatively act, so that the stability of the catalyst is improved, and the service life of the catalyst is remarkably prolonged, and an ignition temperature is remarkably reduced.

Description

Technical field [0001] The invention relates to an environment-friendly, energy-saving, high-conversion rare earth catalyst and a preparation method thereof, and belongs to the field of catalysts. Background technique [0002] With the development of my country's economy, my country's sulfuric acid production has maintained a strong growth momentum. In 1949, my country's annual output of sulfuric acid was 49,000 tons, in 1978 it was 6.61 million tons, and in 2004 it was 44 million tons. It has since become the world's first. In 2015, the output reached about 100 million tons and nearly 400 production companies. The raw materials for sulfuric acid production are pyrite, sulfur and smelting flue gas. The raw materials undergo incineration, purification, reaction and absorption to obtain sulfuric acid products. Among them, reaction is the key step, and the conversion rate determines the yield and yield of sulfuric acid products. The content of sulfur dioxide in the exhaust gas. At...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01D53/86B01D53/50
CPCB01D53/8609B01J23/002B01J23/22B01J2523/00B01J2523/13B01J2523/15B01J2523/3706B01J2523/3712B01J2523/3718B01J2523/3725B01J2523/55
Inventor 沈悦欣朱卫冬
Owner 南京云高新型材料有限公司
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