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Integzal type oxidation catalyst of sulfur dioxide possessing regular channels and its preparing method

A technology for oxidation catalysts and sulfur dioxide, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Single arrangement, shortened service life of catalysts, etc., to achieve the effect of facilitating mass production, strong anti-dust and anti-blocking ability, and reducing fluid resistance

Inactive Publication Date: 2003-07-23
成都川大天华科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Random packing of the catalyst is also easy to form channel flow and wall flow of the fluid in the bed, which reduces the reaction efficiency
In the process of random stacking of catalyst particles, it is easy to cause uneven pressure, crushing and pulverization of the particles, which shortens the service life of the catalyst
[0003] Chinese patent ZL91103089.1 provides a sulfur dioxide oxidation catalyst, which uses titanium oxide as a carrier, vanadium oxide, alkali metal oxides and / or sulfates as catalytic active substances, and is processed into a monolithic or honeycomb by an extrusion machine It can be used in exhaust gas and flue gas purification devices that are sensitive to pressure loss and / or for treating dusty air, exhaust gas or flue gas flow, but the disadvantages are: 1. Using titanium oxide as a carrier leads to increased costs ; 2. The shape and arrangement of gas channels are single, so the applicable surface is limited and cannot fully meet the needs of sulfuric acid production

Method used

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  • Integzal type oxidation catalyst of sulfur dioxide possessing regular channels and its preparing method
  • Integzal type oxidation catalyst of sulfur dioxide possessing regular channels and its preparing method
  • Integzal type oxidation catalyst of sulfur dioxide possessing regular channels and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The shape and structure of the sulfur dioxide oxidation catalyst prepared in this example are as follows: figure 1 As shown in Figure 6, the body 1 is a cube, and the fluid channels 2 in the body are distributed in layers. The fluid channels in each layer are composed of two groups of rectangular grooves arranged in parallel and with an angle of 90° between each other. One group of rectangular grooves The included angle between the groove and the axis of the reaction bed is 45°, so that the fluid channel of each layer is a rectangular groove cross network structure.

[0053] The raw material components for preparing sulfur dioxide oxidation catalyst are as follows:

[0054] Diatomaceous earth 1000g 10mm glass fiber 62.5g

[0055] V2 o 5 100g P 2 o 5 62.5g

[0056] KOH 169g Graphite 25g

[0057] Na 2 SO 4 100g sulfur 25g

[0058] The process steps of preparing sulfur dioxide oxidation catalyst are as follows:

[0059] (1...

Embodiment 2

[0073] The shape and structure of the sulfur dioxide oxidation catalyst prepared in this example are the same as those in Example 1.

[0074] The raw material components for preparing sulfur dioxide oxidation catalyst are as follows:

[0075] Diatomaceous earth 1000g 10mm glass fiber 100g

[0076] V 2 o 5 100g P 2 o 5 100g

[0077] KOH 169g Graphite 50g

[0078] Na 2 SO 4 100g sulfur 50g

[0079] Lignosulfonate 25g

[0080] The process steps of preparing sulfur dioxide oxidation catalyst are as follows:

[0081] (1) Slurry preparation

[0082] Same as Example 1.

[0083] (2) Mold combination

[0084] Same as Example 1.

[0085] (3) Molding and forming

[0086] Using the pressure grouting process, apply 10MPa pressure to the prepared slurry and inject it into the mold and vibrate. The vibration frequency is 120 / min. The vibration time is limited to the absence of air bubbles in the slurry. After the grouting is completed, put the...

Embodiment 3

[0092] The shape and structure of the sulfur dioxide oxidation catalyst prepared in this example is different from Example 1 in that the fluid channel is composed of two sets of trapezoidal grooves arranged in parallel with each other and the angle between them is 90°, wherein one set of trapezoidal grooves and the reaction The included angle of the bed axis is 45°, so that the fluid channel of each layer is a trapezoidal groove cross network structure.

[0093] The raw material components for preparing sulfur dioxide oxidation catalyst are as follows:

[0094] Diatomaceous earth 800g Kaolin 200g

[0095] 10mm glass fiber 62.5g V 2 o 5 100g

[0096] P 2 o 5 62.5g KOH 169g

[0097] Graphite 50g Sulfur 50g

[0098] Lignosulfonate 25g Methylcellulose 50g

[0099] The process steps of preparing sulfur dioxide oxidation catalyst are as follows:

[0100] (1) Slurry preparation

[0101] Same as Example 1.

[0102] (2) Mold combination

[0103] S...

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Abstract

An integral catalyst with regulator channels for oxidizing SO2 is prepared from vanadium oxide, alkali-metal compound, silicon oxide or the mixture of silicon oxide and silicon aluminium oxide as carrier, and glass fibres and / or asbestos fibres and / or meallic wool through mixing, moulding, demoulding, drying and calcining.

Description

1. Technical field [0001] The invention belongs to a sulfur dioxide oxidation catalyst, in particular to an integral sulfur dioxide oxidation catalyst for sulfuric acid production. 2. Background technology [0002] The sulfur dioxide oxidation catalyst used in the existing sulfuric acid industry usually adopts extrusion method to make cylindrical or spherical or ring or chrysanthemum catalyst. Catalyst scattered in the reactor, containing SO 2 The reaction gas flows through the reactor along the void channels filled with the granular catalyst and reacts. Since the channels formed by scattered catalysts are irregular, the fluid resistance of the gas flow through the reaction bed is large, which directly affects the production capacity of the reactor. The random packing of the catalyst is also easy to form channel flow and wall flow of the fluid in the bed, which reduces the reaction efficiency. The random stacking of catalyst particles can also easily lead to uneven pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/86B01J23/22B01J35/10
Inventor 梁斌蒋炜蒲开蕴刘长军
Owner 成都川大天华科技开发有限责任公司
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