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Preparation method of low-temperature multifunctional sulfur recycling catalyst

A sulfur recovery and multi-functional technology, which is applied in the preparation/purification of sulfur, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc. It can improve the performance of low-temperature Claus reaction, overcome the high conversion rate of Claus reaction and the low hydrolysis rate of organic sulfur, and improve the deoxidation protection function.

Inactive Publication Date: 2018-06-01
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN1383813A discloses a kind of TiO 2 -Al 2 o 3 Bifunctional sulfur recovery catalyst and preparation method thereof, the catalyst is made of metatitanic acid and alumina as a carrier, impregnated with alkali metal or alkaline earth metal compounds, such as calcium nitrate, etc., has large specific surface area, high strength, and good organic sulfur hydrolysis activity and other advantages, but the Claus activity is relatively low, and it does not have the function of oxygen leakage protection, and the sulfate content is high
CN1336253A discloses a dual-functional sulfur recovery catalyst, which uses activated alumina as a carrier, iron-containing compounds as active components, and V 2 o 5 As an auxiliary agent, it not only has a high oxygen leakage protection effect, but also has a high Claus activity, but the catalytic effect of organosulfur hydrolysis is poor
The reaction temperature of organic sulfur hydrolysis of existing sulfur recovery catalysts is above 300°C, generally controlled above 330°C, but the temperature is high and the conversion rate of Claus reaction is low

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  • Preparation method of low-temperature multifunctional sulfur recycling catalyst

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Embodiment 1

[0021] This embodiment relates to a preparation method of a low-temperature multifunctional sulfur recovery catalyst, specifically as follows:

[0022] 117g of dried pseudo-boehmite powder and 122g of metatitanic acid powder are mixed, and the content of alumina in the mixture can be 40-60%wt, and the content of titanium oxide can be 40-60%wt. Add 3%wt of the above-mentioned powder mixture mass of turmeric powder, 3%wt of citric acid, add 100g of water, grind while blending, knead through a twin-screw extruder for 0.5h, and extrude with a Φ4.5mm orifice plate , placed at room temperature for 12 hours to dry, dried at 120°C for 3 hours, and finally calcined at 400°C for 4 hours to obtain a carrier.

[0023] The carrier was loaded with lanthanum by the equal volume impregnation method, using lanthanum nitrate as the precursor, and prepared into a solution. Based on the amount of the carrier, the loading amount of lanthanum was 0.5%wt of the carrier, and dried at room temperature...

Embodiment 2

[0028] This embodiment relates to a preparation method of a low-temperature multifunctional sulfur recovery catalyst, specifically as follows:

[0029] 117g of dried pseudo-boehmite powder and 122g of metatitanic acid powder are mixed, and the content of alumina in the mixture can be 40-60%wt, and the content of titanium oxide can be 40-60%wt. Add 3%wt of the above-mentioned powder mixture mass of turmeric powder, 3%wt of citric acid, add 100g of water, grind while blending, knead through a twin-screw extruder for 0.5h, and extrude with a Φ4.5mm orifice plate , placed at room temperature for 12 hours to dry, dried at 120°C for 3 hours, and finally calcined at 400°C for 4 hours to obtain a carrier.

[0030] The carrier was loaded with lanthanum by equal volume impregnation method, and lanthanum sulfate was used as a precursor to prepare a solution. Based on the amount of carrier, the loading amount of lanthanum was 0.5%wt of the carrier, and dried at room temperature for 12h an...

Embodiment 3

[0035] This embodiment relates to a preparation method of a low-temperature multifunctional sulfur recovery catalyst, specifically as follows:

[0036] Mix 117g of dried pseudo-boehmite powder with 122g of metatitanic acid powder. The content of alumina in the mixture can be 40-60%wt, and the content of titanium oxide can be 40-60%wt. Pseudo-boehmite The specific weights of 117g of stone powder and 122g of metatitanic acid powder can be increased or decreased depending on the specific situation, and will not be repeated, and the same is true for the following embodiments.

[0037] Add 3%wt of the above-mentioned powder mixture mass of turmeric powder, 3%wt of citric acid, add 100g of water, grind while blending, knead through a twin-screw extruder for 0.5h, and extrude with a Φ4.5mm orifice plate , placed at room temperature for 12 hours to dry, dried at 120°C for 3 hours, and finally calcined at 400°C for 4 hours to obtain a carrier.

[0038] The carrier is loaded with lanth...

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Abstract

The invention relates to a preparation method of a low-temperature multifunctional sulfur recycling catalyst. The preparation method comprises the following steps: i, mixing pseudo-boehmite and metatitanic acid; adding a pore-forming agent and a binding agent; blending and grinding at the same time; drying at 120 DEG C for 2h; finally, roasting at 400 DEG C for 4h to obtain a carrier; ii, loadinglanthanum on the carrier obtained by step i through an equal-volume immersion method; iii, loading iron on a solid in step ii through the equal-volume immersion method; iv, loading potassium on a solid in step iii through the equal-volume immersion method; v, roasting a solid in step iv at 400 to 600 DEG C for 3 to 5h, so as to obtain the catalyst. The multifunctional sulfur recycling catalyst prepared through the preparation method provided by the invention has the main technical characteristics that aluminum oxide and titanium dioxide are prepared into the composite carrier, iron oxide is loaded and advantages of a traditional catalyst are expressed; the sulfation resisting capability and the deoxygenation protection function of the catalyst are improved.

Description

technical field [0001] The invention relates to the preparation of a sulfur recovery catalyst, in particular to a preparation method of a low-temperature multifunctional sulfur recovery catalyst. Background technique [0002] Sulfur recovery catalysts mainly include activated alumina, iron-containing alumina catalysts, titanium-containing alumina catalysts and titanium-based catalysts. Activated alumina catalyst has good initial activity, poisoning caused by sulfation, the presence of trace oxygen and SO 2 Caused by irreversible adsorption on the catalyst, the iron-containing alumina catalyst has good oxygen resistance, but the organosulfur hydrolysis performance is not ideal, and the titanium-containing alumina catalyst has improved organosulfur hydrolysis activity, but the oxygen resistance is not ideal, but the low-temperature performance of the titanium-alumina catalyst requires strengthen. [0003] Sulfation is the most important cause of catalyst deactivation, and su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B17/04
CPCC01B17/0434B01J23/002B01J23/83B01J2523/00B01J35/615B01J35/633B01J2523/13B01J2523/31B01J2523/3706B01J2523/47B01J2523/842Y02P20/584
Inventor 余国贤何凡吴宏观李海峰
Owner JIANGHAN UNIVERSITY
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