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A kind of preparation method of sulfur dioxide oxidation preparation sulfuric acid catalyst

A technology of sulfur dioxide and oxidation production, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of poor performance stability and low catalytic activity, reaching five The effect of low concentration of vanadium oxide, strong catalytic activity and high concentration of vanadium pentoxide

Active Publication Date: 2021-12-07
XIANGYANG JINGXIN CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the catalyst for sulfur dioxide oxidation to sulfuric acid is usually prepared by mixing the active components with the carrier at one time, which has low catalytic activity and poor performance stability.

Method used

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  • A kind of preparation method of sulfur dioxide oxidation preparation sulfuric acid catalyst

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Embodiment 1

[0026] Embodiment 1: a kind of preparation method of sulfur dioxide oxidation sulfuric acid catalyst, comprises the following steps, step 1, vanadium, get vanadium pentoxide and water, the mass ratio of vanadium pentoxide and water is 1:4, while stirring water While adding vanadium pentoxide, stir for 0.5h, and let stand for 3-4h to obtain a mixture of vanadium pentoxide and water.

[0027] Step 2: Potassium is added, and potassium hydroxide is put into a mixture of vanadium pentoxide and water, wherein the molar ratio of potassium to vanadium is 2.8:1, and a reaction mixture is obtained after the reaction.

[0028] Step 3, clarifying and filtering, filtering the reaction mixed solution to obtain a clarified mixed solution and a filter residue, the filter residue is press-filtered to obtain a filter cake and a filtrate, and the filtrate is refluxed into the clarified mixed solution.

[0029] Step 4, neutralization, adding sulfuric acid to the clarified mixed solution to adjust...

Embodiment 2

[0040]Example 2: A preparation method of a catalyst for sulfur dioxide oxidation to sulfuric acid, the difference from Example 1 is that step 5, mixing and grinding, taking active colloid and carrier for later use, the carrier is selected from diatomaceous earth. Take 80% of the carrier and active colloid and add them into a planetary wheel mill mixer for mixing and grinding. The amount of active colloid is 5% of the total mass of the carrier. Step 9, secondary mixing and milling; take the calcined material, add 20% carrier and active colloid, and place it in the planetary wheel mill mixer again for mixing and milling. The amount of active colloid is 8% of the total mass of the carrier.

Embodiment 3

[0041] Example 3: A preparation method of a catalyst for sulfur dioxide oxidation to sulfuric acid. The difference from Example 1 is that in step 5, mixing and milling, the active colloid and carrier are taken for later use, and the carrier is selected from diatomaceous earth. Take 80% of the carrier and active colloid and add them into a planetary wheel mill mixer for mixing and grinding. The amount of active colloid is 6% of the total mass of the carrier. Step 9, secondary mixing and milling; take the calcined material, add 20% carrier and active colloid, and put it in the planetary wheel mill mixer again for mixing and milling, the amount of active colloid is 10% of the total mass of the carrier.

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Abstract

The invention belongs to the technical field of catalysts, and discloses a preparation method of a catalyst for sulfuric acid oxidation by sulfur dioxide, which takes a carrier, contains VO 3 ‑ The active colloid of 80% carrier and 3%-6% of the total mass of the carrier are weighed and mixed for milling, and then dried, calcined and sieved, and then 20% of the carrier and 6% of the total mass of the carrier are added ‑10% active colloid, after secondary mixing and grinding, molding, secondary drying, secondary calcination, cooling and sieving, the sulfur dioxide oxidation catalyst for sulfuric acid production is obtained. The present invention has the following advantages and effects: after the active colloid is mixed with the carrier, dried and calcined, the active colloid is added again for mixed milling, drying and calcined, and after cooling and sieving, the obtained sulfur dioxide is oxidized into the sulfuric acid catalyst. The concentration of vanadium pentoxide in the layer is low, the concentration of vanadium pentoxide on the surface is high, and the catalytic activity is strong.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a preparation method of a catalyst for sulfur dioxide oxidation to sulfuric acid. Background technique [0002] Sulfuric acid is an important chemical raw material and occupies a very important position in national emergencies. The sulfur dioxide oxidation catalyst used in the production of sulfuric acid is mostly made of vanadium pentoxide as the active component and diatomaceous earth as the carrier. After rolling, drying, calcination and molding, the sulfur dioxide catalyst for sulfuric acid production is obtained. In the prior art, the catalyst for sulfur dioxide oxidation to sulfuric acid is usually prepared by mixing the active components with the carrier at one time, which has low catalytic activity and poor performance stability. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of sulfur dioxide oxidation sulf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J27/055C01B17/79
Inventor 余少发
Owner XIANGYANG JINGXIN CATALYST