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Dephosphorization agent for removing PH3 in yellow phosphorus tail gas, preparation method and application thereof

A technology of yellow phosphorus tail gas and dephosphorization agent, which is applied in the direction of separation methods, chemical instruments and methods, phosphine, etc., can solve the problems of insufficient purification precision, sensitivity, and influence on the use effect, and achieve high social and economic benefits, The effect of high dephosphorization precision and convenient production

Active Publication Date: 2009-12-02
DALIAN CATALYTIC ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not give a specific phosphorus capacity and its purification accuracy is not enough. In today's chemical synthesis, the purification requirements for sulfur and phosphorus are all within 1ppm
At the same time, the copper salt and other catalytic components used in it are sensitive to sulfide, and the yellow phosphorus tail gas often contains high COS, which will seriously affect its use effect
[0006] The purification and removal of pH reported in the above literature 3 Most of the methods are based on adsorption and purification, and there are also catalytic oxidation methods, but the removal efficiency is not high, and the components used are often metal oxides such as copper and zinc, which are sensitive to COS, while the above patents There is also no mention of how much phosphorus capacity can be achieved when there is organic sulfur in the tail gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 8g Al 2 (SO 4 ) 3 18H 2 O, 1.0g MgSO 4 , 0.2g Na 3 PO 4 , 0.1g of sodium sulfonate was dissolved in 50ml of water to make an impregnating solution, and 100g of water-treated activated carbon made from coal was impregnated, then dried at room temperature for 12 hours, and then fired at 300°C for 2 hours to obtain Dephosphorization agent with particle size of ￠1.5×4mm. Performance evaluation experiment: The dephosphorization reactor adopts ￠15×50mm, the filling amount of desulfurization agent is 6ml, the reaction temperature is 60℃, the relative humidity is 40%, the space velocity is 200 / h, the COS content in the raw gas is 3000ppm, and the pH 3 The content is 2000PPm, the oxygen concentration is 0.7%, and the rest is N 2 . Its penetration phosphorus capacity is 2.6%, and its working phosphorus capacity is 12.2%.

Embodiment 2

[0024] 8g KAl(SO 4 ) 2 12H 2 O, 1.0g MgSO 4 , 0.2g Na 3 PO 4 1. Dissolve 0.1g of sodium sulfonate in 50ml of water to make an impregnating solution, mix and impregnate 100g of water-treated coal activated carbon, and then dry at room temperature for 12 hours to obtain a dephosphorization agent with a particle size of ￠1.5×4mm. Performance evaluation experiment: The dephosphorization reactor adopts ￠15×50mm, the filling amount of desulfurization agent is 6ml, the reaction temperature is 60℃, the relative humidity is 40%, the space velocity is 200 / h, the COS content in the raw gas is 3000ppm, and the pH 3 The content is 2000PPm, the oxygen concentration is 0.7%, and the rest is N 2 . Its penetration phosphorus capacity is 1.4%, and its working phosphorus capacity is 15.4%.

Embodiment 3

[0026] 8g NaH 2 PO 4 , 1.0g Na 2 SO 4 1. Dissolve 0.1g of sodium sulfonate in 50ml of water to make an impregnating solution, mix and impregnate 100g of water-treated coal activated carbon, then dry at 30°C for 12 hours, and then burn at 200°C for 2 hours to prepare A dephosphorizing agent with a particle size of ￠1.5×4mm was obtained. Performance evaluation experiment: The dephosphorization reactor adopts ￠15×50mm, the filling amount of desulfurization agent is 6ml, the reaction temperature is 60℃, the relative humidity is 40%, the space velocity is 200 / h, the COS content in the raw gas is 3000ppm, and the pH 3The content is 2000PPm, the oxygen concentration is 0.7%, and the rest is N 2 . Its penetration phosphorus capacity is 1.2%, and its working phosphorus capacity is 13.4%.

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Abstract

The invention provides a dephosphorization agent for removing PH3 in yellow phosphorus tail gas, a preparation method and application thereof. The dephosphorization agent comprises the following components by weight percent: 1-10 percent of metal salt, 0.1-10 percent of accelerant and the balance of active carbon. The preparation method comprises the following steps: impregnating the metal salt and the accelerant in selected treated active carbon individually or together according to the proportion, drying for 4-30 hours at 25-150 DEG C, and roasting for 2-4 hours at 150-500 DEG C to obtain the dephosphorization agent. The dephosphorization agent is suitable for removing PH3 in various kinds of gas sources, has favorable adaptability for gas sources, can remove PH3 in sulphureous gas, and has the advantages of high phosphorus capacity, simple flow, wide operation window, simple and convenient dephosphorization agent preparation method, and the like.

Description

technical field [0001] The invention relates to the dephosphorization technology of industrial gas, and provides a method for removing PH in yellow phosphorus tail gas 3 Dephosphorization agent, its preparation method and application. Background technique [0002] During the production process of yellow phosphorus, a large amount of yellow phosphorus tail gas rich in CO will be produced. Generally, the CO content is 85-95%, and other impurities are phosphides (mainly in the form of pH 3 form) and sulfides (mainly COS, H 2 S form) and fluoride, etc., the purified yellow phosphorus tail gas can be used as a raw material for the synthesis of various one-carbon chemical products, and has a wide range of uses. Currently purifying to remove PH 3 There are many methods, but based on the difficulty of purification and separation, the adsorption purification method used in most methods has a short cycle and must be desulfurized first, which hinders the reuse of yellow phosphorus t...

Claims

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Application Information

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IPC IPC(8): B01D53/04C01B25/06
Inventor 刘振峰娄肖杰傅桂芝吴迪镛李锋李秀贞宫玉峰甄宪宇
Owner DALIAN CATALYTIC ENG TECH
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