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Catalyst for preparing sulfur by selective oxidation of hydrogen sulfide and preparation method thereof

A selective oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of poor resistance to sulfation and oxygen fluctuation, The problems of low catalyst selectivity and low sulfur recovery rate can achieve the effect of strong anti-sulfation and anti-oxygen content fluctuation ability, good economic and environmental benefits, and long catalyst life.

Inactive Publication Date: 2020-02-28
青岛联信催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the main problems in the selection of sulfur oxide recovery catalysts are: (1) the selectivity of the catalyst is low, mainly due to the high selectivity of sulfur dioxide, which leads to a low recovery rate of sulfur; (2) the stability of the catalyst is poor, mainly It is the use of raw materials that are easy to sulphate. Although the initial activity and low-temperature activity are high, the service life is short; (3) the fluctuation of the antioxidant content is poor, and it can only be used at O 2 / H 2 S is operated within a narrow range, which increases the difficulty of operation, or in order to achieve better performance of the catalyst, the investment cost has to be increased and the time for feedback adjustment is shortened; (4) It is greatly affected by temperature: hydrogen sulfide selection The reaction of oxidation to sulfur is a strong exothermic reaction, especially when used in an adiabatic reactor, the performance of the catalyst is more significantly affected by the temperature
However, using metatitanic acid, silica powder and calcium silicate as the carrier of the catalyst has poor resistance to sulfation and oxygen fluctuations, and a short service life. 2 S conversion rate and sulfur selectivity still cannot meet the demand

Method used

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  • Catalyst for preparing sulfur by selective oxidation of hydrogen sulfide and preparation method thereof
  • Catalyst for preparing sulfur by selective oxidation of hydrogen sulfide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 160g of titanyl sulfate and add a certain amount of water to make it completely dissolved, add 67g of silica sol containing 30% (wt), stir to obtain a mixed solution, add dropwise 25% (wt) ammonia solution, and control the terminal pH to be 10-11. The resulting suspension was left to stand for 4 hours, filtered and washed, and the obtained solid was dried at 100°C, calcined at 500°C for 4 hours, and pulverized to obtain a titanium-silicon composite oxide, coded as TS-1.

[0030] Weigh 89g titanium-silicon composite oxide TS-1, add 25g Fe(NO 3 ) 3 9H 2 O and 3.7g Al(NO 3 ) 3 9H 2 The aqueous solution made of O was stirred and impregnated. After the mud body was aged for 12 hours, it was dried at 100°C. After crushing, 50g and 2g of scallop powder were extruded into strips. After decomposing at 500°C for 4 hours, the finished catalyst was obtained, and the number was Cat-01. .

Embodiment 2

[0032] Weigh 89g titanium-silicon composite oxide TS-1, add 25g Fe(NO 3 ) 3 9H 2 The solution prepared by O was stirred and impregnated. After the mud body was aged for 12 hours, it was dried at 100°C, crushed, added with 4g of scallop powder and extruded into strips, decomposed at 500°C for 4 hours to obtain a semi-finished catalyst. Get 99g of the above semi-finished products and add to 3.7g Al(NO 3 ) 3 9H2 Immerse equal volumes in the aqueous solution made of O, dry at 60°C, and decompose at 400°C for 2 hours to obtain the finished catalyst, numbered Cat-02.

Embodiment 3

[0034] Weigh 89g of titanium-silicon composite oxide TS-1, mix it with 4g of Sesame powder, add 6.4g of Mg(NO 3 ) 2 ·6H 2 The aqueous solution made of O was extruded, aged at room temperature for 12 hours, dried at 45°C, and decomposed at 500°C for 4 hours to obtain a catalyst carrier. Get above-mentioned carrier 90g and add to with 25g Fe(NO 3 ) 3 9H 2 The solution prepared by O was impregnated with equal volume, dried at 60°C, and decomposed at 400°C for 2 hours to obtain the finished catalyst, numbered Cat-03.

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Abstract

The invention provides a catalyst for preparing sulfur by selective oxidation of hydrogen sulfide and a preparation method of the catalyst. The catalyst is prepared by taking a titanium-silicon composite oxide as a carrier, taking ferric oxide or / and chromic oxide as an active component, and adding a certain amount of an active additive. The catalyst not only has high hydrogen sulfide conversion activity and sulfur generation selectivity, but also has sulfation resistance, oxygen content resistance and temperature fluctuation resistance, the stability and operability of the catalyst are improved, and the catalyst has a long service life.

Description

technical field [0001] The present invention relates to a catalyst for the selective oxidation of hydrogen sulfide to sulfur and its preparation method, more specifically to a sulfuric acid catalyst with higher stability, wider application range, stronger operability and longer service life. Catalyst for preparing sulfur by hydrogen selective oxidation and its preparation method. Background technique [0002] Petroleum industry, natural gas extraction, metal melting in iron and steel production, coal liquefaction and other processes are often accompanied by a considerable amount of sulfide formation, mainly H 2 S. It is a form of sulfide pollutants and one of the pollution sources of acid rain. [0003] For high concentrations of H 2 For tail gas treatment, the Claus tail gas recovery method is widely used in industry. For low concentrations of H 2 S (less than 15%) tail gas treatment, because the Claus method is limited by thermodynamics, it is not economical, and ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/80B01J35/10C01B17/04
CPCB01J23/002B01J23/745B01J23/80B01J2523/00C01B17/0434C01B17/0456B01J2523/31B01J2523/41B01J2523/47B01J2523/842B01J2523/22B01J2523/27
Inventor 王利军肖杰飞纵秋云杜伟东高辉王晓红
Owner 青岛联信催化材料有限公司
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