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Manufacturing method for manufacturing sulfuric acid catalyst by sulphur oxide oxidation

A sulfur dioxide and manufacturing method technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as uneven catalyst quality, low catalyst product quality, uneven heating of materials, etc., to achieve heating The effect of fast speed, reduced energy consumption, and increased inner pore volume

Inactive Publication Date: 2018-12-18
麻城市天恒商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The drying method is heat conduction heating from the outside to the inside of the material, and the water evaporates from the inside to the outside, and the water evaporation and heat conduction are reversed, so that the drying efficiency is low, the energy consumption is high, the time required is long, and the material is heated unevenly, resulting in Catalyst products are of lower quality
[0006] The existing technology of sulfur dioxide oxidation to sulfuric acid catalysts in my country has low overall production efficiency, low heat efficiency, and low automation procedures, resulting in uneven catalyst quality

Method used

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  • Manufacturing method for manufacturing sulfuric acid catalyst by sulphur oxide oxidation

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Effect test

Embodiment 1

[0037] The manufacturing method of the sulfur dioxide to sulfuric acid catalyst of the present invention, the detailed steps of the manufacturing method are as follows:

[0038] Preparation of catalyst raw materials: based on the production of 1 ton of catalyst, the percentage of each raw material in the weight of 1 ton of catalyst is V2O58%; K2O12%, Na2SO42%, SO315%, Al2O33%, CaO2%, and the balance is diatom earth;

[0039] Preparation of refined diatomaceous earth: Weigh various raw materials according to the raw material preparation of the catalyst in step a. First, the raw material diatomaceous earth is selected and pulped, and then concentrated sulfuric acid with a mass percentage of 98.5% is added. After adding concentrated sulfuric acid, the sulfuric acid in the material is added The mass percentage is 70%. Add concentrated sulfuric acid for carbonization, and the carbonization time is 2h; after carbonization, add water for pickling, and heat the material to 80℃, keep it at ...

Embodiment 2

[0046] Embodiment 2: It is basically the same as embodiment 1, except that:

[0047] Step a: The percentages of each raw material in the weight of 1 ton of catalyst are V2O511%; K2O7%, Na2SO40.5%, SO310%, Al2O31%, CaO1%, and the balance is diatomaceous earth;

[0048] Step b: Then add concentrated sulfuric acid with a mass percentage concentration of 92.5%. After adding concentrated sulfuric acid, the mass percentage of sulfuric acid in the material is 60%. Add concentrated sulfuric acid for carbonization, and the carbonization time is 1h; after carbonization, add water to proceed. Pickling, heating the material to 60℃, keeping it for 2h at this temperature, adding water to make the sulfuric acid content of the material 25% by mass; press filtering and drying after pickling (using an oven for drying , The drying temperature is 80℃, and the drying time is 4h), after drying, refined diatomite is obtained;

[0049] Step c: Mix vanadium pentoxide and potassium hydroxide for heating and ...

Embodiment 3

[0054] Embodiment 3: It is basically the same as Embodiment 1, except that:

[0055] Step a: The percentage content of each raw material in the weight of 1 ton of catalyst is V2O55%; K2O20%, Na2SO41%, SO310%, Al2O31%, CaO1%, and the balance is diatomaceous earth;

[0056] Step b: Then add 95% concentrated sulfuric acid by mass. After adding concentrated sulfuric acid, the mass percentage of sulfuric acid in the material is 65%. Add concentrated sulfuric acid for carbonization. The carbonization time is 1.5h; after carbonization, add water Carry out pickling, heat the material to 95℃, keep it at this temperature for 1.5h, add water to make the mass percentage of sulfuric acid in the material be 30%; after pickling, press filter and dry (using oven Drying, the drying temperature is 120℃, the drying time is 2h), after drying, refined diatomaceous earth is obtained;

[0057] Step c: Mix vanadium pentoxide and potassium hydroxide for heating and melting, the melting temperature is 95°C; ...

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Abstract

The invention discloses a manufacturing method for manufacturing a sulfuric acid catalyst by sulphur oxide oxidation. The manufacturing method comprises the following steps: raw material preparation of the catalyst, preparation of refined diatomite, preparation of a vanadic anhydride solution, mixing and kneading, moulding, drying of the catalyst's materials, calcining of the catalyst's materials,and screening and packaging. During the drying process of the catalyst's materials, a microwave drying method is adopted for drying. During the calcining process, an intermediate frequency furnace isadopted for calcining. The catalyst product produced by the above manufacturing method has characteristics of large internal aperture, large internal pore volume, low bulk density, good compressive strength, high activity and the like, which can meet the requirement of higher sulfur dioxide conversion rate and environmental protection. By the above method for manufacturing the sulfuric acid catalyst, the energy consumption is low, and low carbon, energy conservation, environmental protection, high efficiency and automatic continuous production are achieved. Therefore, the method of the invention has remarkable economic benefit and social benefit.

Description

Technical field [0001] The present invention relates to a method for producing a sulfuric acid catalyst, in particular to a method for producing a catalyst for oxidizing sulfur dioxide to produce sulfuric acid. Background technique [0002] The platinum catalyst has the best activity among the catalysts for oxidation of sulfur dioxide to sulfuric acid. However, platinum-based catalysts are sensitive to arsenic poisoning, require high raw material gas purification costs, and are expensive themselves. Therefore, those skilled in the art have researched and developed vanadium-based catalysts. After the vanadium-based catalysts were put into use, platinum-based catalysts were quickly replaced by vanadium-based catalysts. Vanadium catalysts are prepared with vanadium pentoxide as the main active component, sulfates of alkali metals (mainly potassium, cesium, and sodium) as cocatalysts, and silica gel, diatomaceous earth, aluminum silicate, etc. as catalyst carriers made. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198B01J37/34C01B17/79
CPCB01J27/198B01J37/346C01B17/79Y02P20/10
Inventor 鲁争
Owner 麻城市天恒商贸有限公司