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An environment-friendly, energy-saving, high-conversion rare earth catalyst and preparation method thereof

A rare earth catalyst, high conversion rate technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high cost of tail gas treatment and high wear rate , to achieve the effect of solving the exhaust emission problem, prolonging the service life and improving the stability

Active Publication Date: 2020-10-13
南京云高新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • An environment-friendly, energy-saving, high-conversion 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 Add O to 400mL distilled water, add 150g of refined diatomaceous earth after completely dissolving, stir for 30min, dry in vacuum at 60°C for 12h, and roast at 400°C for 4h to obtain material b; 2 o 5 , 10gKOH is fully dissolved in the same reaction tank, after mixing evenly, add 2.5g organic polymer compound (polyethylene glycol 8000) and 2.5g surfactant (hexadecyltrimethylammonium bromide), fully react to obtain KVO 3 or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), join in the material b after reaction forms uniform solution, and and 10gCs 2 SO 4 , 2.5g thiosulfate, 2.5g sodium bicarbonate, 2.5mL phosphoric acid (mass concentration is 85%), and 7.5% sulfur (fineness 20 orders) are metered into the roller and fully mixed and milled for 0.5 hour. The mixed and milled material is mechanically shaped, then dr...

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 Add O to 400mL distilled water, add 150g of refined diatomaceous earth after completely dissolving, stir for 30min, dry in vacuum at 60°C for 12h, and roast at 400°C for 4h to obtain material b; 2 o 5 , 10gKOH is fully dissolved in the same reaction tank, after mixing evenly, add 2.5g organic polymer compound (polyvinylpyrrolidone PVPK15) and 2.5g surfactant (hexadecyltrimethylammonium chloride), fully react to obtain KVO 3 or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), join in the material b after reaction forms uniform solution, and and 10gCs 2 SO 4 , 2.5g thiosulfate, 2.5g sodium bicarbonate, 2.5mL phosphoric acid (mass concentration is 85%), and 7.5% sulfur (fineness 20 orders) are metered into the roller and fully mixed and milled for 0.5 hour. The mixed and milled material is mechanically shaped, then dried ...

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 Add O to 400mL distilled water, add 150g of refined diatomaceous earth after completely dissolving, stir for 30min, dry in vacuum at 60°C for 12h, and roast at 400°C for 4h to obtain material b; 2 o 5 , 10gKOH is fully dissolved in the same reaction tank, after mixing evenly, add 2.5g organic polymer compound (polystyrene GH-660) and 2.5g surfactant (sodium dodecylbenzenesulfonate), fully react to obtain KVO 3 or NaVO 3 Solution, take 200mL, add 60mL dilute sulfuric acid (mass concentration 25%), join in the material b after reaction forms uniform solution, and and 10gCs 2 SO 4 , 2.5g thiosulfate, 2.5g sodium bicarbonate, 2.5mL phosphoric acid (mass concentration is 85%), and 7.5% sulfur (fineness 20 orders) are metered into the roller and fully mixed and milled for 0.5 hour. The mixed and milled material is mechanically shaped, then dried at 150...

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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 and high-conversion rare earth catalyst and a preparation method thereof, belonging 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, in 2004 it was 44 million tons, and it has since become the world's first. In 2015, the output reached about 100 million tons, and there were nearly 400 production enterprises. The raw materials for sulfuric acid production are pyrite, sulfur and smelting flue gas, etc. The raw materials are incinerated, purified, reacted and absorbed to obtain sulfuric acid products, among which 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 exh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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