Catalyst containing caesium and vanadium and preparation method thereof

A cesium vanadium catalyst and content technology, applied in the chemical industry, can solve the problems of damage to the carrier skeleton, rapid thermal decay, uneven dispersion, etc., and achieve the effects of reducing operating temperature, widening operating range, and improving low-temperature activity.

Inactive Publication Date: 2016-03-30
贵州威顿催化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst prepared by this traditional mixing and grinding process is basically a solid-solid mixture, and the active substance cannot be completely evenly distributed on the surface of the carrier and in the micropores, resulting in uneven dispersion, and may also damage the carrier skeleton. Due to the nature of the product, the operating temperature of the produced product is relatively high, and the operating temperature range is narrow, and the heat decay is fast, which cannot meet the production requirements of high conversion rate and low emission of sulfuric acid production enterprises.

Method used

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  • Catalyst containing caesium and vanadium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0023] A preparation method containing cesium vanadium catalyst, comprising the following steps:

[0024] Cesium vanadium-containing catalyst, the total mass of its components is 100%, and the content of each component is:

[0025] Vanadium pentoxide (V 2 o 5 ) 7%;

[0026] Cesium oxide (Cs 2 O) 4%;

[0027] Potassium oxide (K 2 O) 11.5%;

[0028] Sodium oxide (Na 2 O) 5%;

[0029] The balance is diatomaceous earth;

[0030] Dissolve 15.1kgKOH in 40kg water, add 7kgV 2 o 5 Heating reaction to produce KVO 3 solution, after adding 5.1kgCs 2 SO 4 , 11.5kgNa 2 SO 4 ,50kg oxalic acid, 23kgH 2 SO 4 , react at a high temperature of 150-200°C to prepare a complex ion solution, mix it with 54kg of diatomaceous earth evenly, shape it, and dry it at 50-110°C until the moisture content of the material is less than 10% to obtain a semi-finished product. Calcined at 550-700° C. for 1.5 hours to obtain 100 kg of product.

Embodiment 2

[0032] A preparation method containing cesium vanadium catalyst, comprising the following steps:

[0033] Cesium vanadium-containing catalyst, the total mass of its components is 100%, and the content of each component is:

[0034] Vanadium pentoxide (V 2 o 5 ) 8.5%;

[0035] Cesium oxide (Cs 2 O) 8%;

[0036] Potassium oxide (K 2 O) 12.6%;

[0037] Sodium oxide (Na 2 O) 3%;

[0038] The balance is diatomaceous earth;

[0039] Dissolve 16.7kgKOH in 48kg water, add 8.5kgV 2 o 5 Heating reaction to produce KVO 3 Solution, after adding 9.5kgCsOH, 4kgNaOH, 36kg acetic acid, 28kgH 2 SO 4 Heating and reacting to form a mixed solution, which was uniformly mixed with 48kg of diatomaceous earth, shaped, dried and calcined to obtain a 100kg product.

Embodiment 3

[0041] A preparation method containing cesium vanadium catalyst, comprising the following steps:

[0042] Containing cesium vanadium catalyst, the total mass of its components is 100%, and the content of each component is:

[0043] Vanadium pentoxide (V 2 o 5 ) 6.5%;

[0044] Cesium oxide (Cs 2 O) 2%;

[0045] Potassium oxide (K 2 O) 11.4%;

[0046] Sodium oxide (Na 2 O) 6%;

[0047] The balance is diatomaceous earth;

[0048] Dissolve 15.1kgKOH in 35kg water, add 7kgV 2 o 5 Heating reaction to produce KVO 3 solution, after adding 2.6kgCs 2 SO 4 , 12.2kgNa 2 SO 3 ,36kg citric acid, 23kgH 2 SO 4 Heating and reacting to form a mixed solution, which was uniformly mixed with 50.5kg of diatomaceous earth, shaped, dried and calcined to obtain 100kg of product.

[0049] According to the HG2089 test method for catalyst activity of sulfur dioxide oxidation to sulfuric acid, the products obtained at different formulations were tested at 380°C, 410°C, and 485°C, and t...

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Abstract

The invention discloses a catalyst containing caesium and vanadium and a preparation method thereof. With the total mass of the catalyst components as 100% parts, the content of vanadium pentoxide is 5-10%, the content of cesium oxide is 2-14%, the content of potassium oxide is 6-14%, the content of sodium oxide is 1-9%, and the balance is diatomaceous earth. A raw material of the cesium oxide is salt or alkali containing the cesium, such as cesium sulfate (Cs2SO4), cesium carbonate (Cs2CO3) or cesium hydroxide (CsOH). A raw material of the potassium oxide is salt or alkali containing potassium like potassium sulfate, potassium sulfite or potassium hydroxide. A raw material of the sodium oxide is salt or alkali containing sodium like sodium sulfate, sodium sulfite or sodium hydroxide. The catalyst is stable in performance, low in operating temperature, wide in areas, slow in heat fading and high in catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, specifically relates to a cesium vanadium-containing catalyst, and also relates to a preparation method of the cesium vanadium-containing catalyst. Background technique [0002] At present, the production of sulfuric acid mostly uses vanadium catalysts produced with alkali metal potassium sodium salt as an auxiliary agent to speed up the reaction speed and conversion rate of sulfur dioxide oxidation to sulfur trioxide. The temperature range, while the production method adopts the "mixed milling process" to prepare. The mixed grinding process is to dissolve vanadium pentoxide and potassium hydroxide together, and then neutralize it with sulfuric acid to form a fluffy colloidal precipitate of vanadium pentoxide and potassium sulfate, and then carry out wheel grinding with the carrier After mixing, shape, dry and calcinate to obtain the product. However, the catalyst prepared by this t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C01B17/74
CPCB01J23/22C01B17/74
Inventor 梁萍魏静吴海涛冉隆勇杨代华向军
Owner 贵州威顿催化技术有限公司
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