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Desulphurization phosphomolybdic acid catalyst and its preparation method

A desulfurization catalyst, phosphomolybdic acid technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of polluted environment, complicated post-processing, corroded equipment, etc., to achieve high sulfur recovery rate, desulfurization The effect of strong removal of organic sulfur and stable production process

Inactive Publication Date: 2013-04-24
李宝利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a phosphomolybdic acid desulfurization catalyst, which has high catalytic activity, can remove both inorganic sulfur and organic sulfur, is applicable to the purification of high-sulfur gas and low-viscosity liquid, and has high desulfurization efficiency It overcomes the problems of environmental pollution, equipment corrosion, and complicated post-processing in the preparation process of the existing cobalt phthalocyanine desulfurization catalysts.

Method used

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  • Desulphurization phosphomolybdic acid catalyst and its preparation method
  • Desulphurization phosphomolybdic acid catalyst and its preparation method

Examples

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Effect test

Embodiment １

[0022] Take 800g of phosphomolybdic acid (phosphomolybdenum heteropoly acid), add 600g of phthalic anhydride and 200g of urea, put it into a reaction kettle with a stirring device and stir evenly, slowly add 300g of ammonia water and heat evenly to 150-160°C, stop Heating, keep heating for 2-3 hours, start heating to 200°C, keep at 200°C for 6-8 hours, then carry out sampling inspection, if it can be dissolved in water immediately, the heating is over, cool down to 50°C and discharge, Filter the viscous material, put the filtered intermediate product I into another reaction kettle with a stirring device, add 180g of cobalt chloride and stir evenly to obtain the intermediate product II, then take out the intermediate product II and put it in an electric heating box for further Heating, slowly raising the temperature to 200°C for uniform heating and mass transfer. When the temperature is further raised to 260°C, keep the synthesis for 3 hours to form a light yellow solid, take it...

Embodiment ２

[0024] Take 1000g of phosphomolybdic acid (phosphomolybdenum heteropoly acid), add 800g of phthalic anhydride and 200g of urea, put it into a reaction kettle with a stirring device and stir evenly, slowly add 400g of ammonia water and heat evenly to 160-180°C, stop Heating, keep the reaction for 3 hours, then start heating to 240°C, keep heating for 4-5 hours, then take a sample test, if it can be dissolved in water immediately, the heating is over, cool down to 50°C and discharge, the viscous The material is filtered, and the filtered intermediate product I is put into another reaction kettle with a stirring device, and then 140 g of cobalt chloride is added and stirred evenly to obtain the intermediate product II, and then the intermediate product II is taken out and put into an electric heating box for heating. Slowly raise the temperature to 200°C in order to achieve uniform heating and mass transfer. When the temperature is further raised to 260°C, keep the synthesis for 3...

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Abstract

The invention discloses a desulphurization phosphomolybdic acid catalyst and its preparation method. The catalyst is synthesized through a scientific preparation technology of main raw materials comprising molybdophosphoric heteropoly acid having a Keggin structure, phthalic anhydride, cobalt chloride and industrial grade urea. Molybdophosphoric heteropoly acid used in the invention is friendly to the environment, and the adoption of the solid phase synthesis method avoids the use of an organic solvent in the reaction process, so the preparation process of the phosphomolybdic acid catalyst does not pollute the surrounding environment. The use of the molybdophosphoric heteropoly acid in the synthetic process greatly improves the catalyst activity. Compared with present cobalt phthalocyanine catalysts, the desulphurization phosphomolybdic acid catalyst has the advantages of good selectivity, high catalytic activity, removal of inorganic sulfur and organic sulfur, and high desulphurization efficiency (not less than 99%). The desulphurization phosphomolybdic acid catalyst can be widely applied to the desulphurization of various high-H2S gases comprising semi-water gas, natural gas, ammonia synthesis raw gas, coke-oven gas and the like, and the desulphurization purification of S-containing gases and low-viscosity liquids.

Description

technical field [0001] The invention discloses a phosphomolybdic acid desulfurization catalyst and a preparation method thereof, belonging to the technical field of preparation of fine chemical materials. It is a suitable catalyst for liquid-phase oxidation, and can be widely used in the desulfurization and purification of various gases such as coal gas, natural gas, semi-water gas, raw material gas for synthetic ammonia, coke oven gas, and low-viscosity liquids. Background technique [0002] The wet oxidation desulfurization and decyanation process is a method for removing hydrogen sulfide, hydrogen cyanide and other toxic substances in the gas in the liquid phase, and has been widely used in the purification process of various sulfur- and cyanide-containing gases. At present, most of the practical wet oxidation desulfurization and decyanation catalysts are phthalocyanine cobalt, including the single use of phthalocyanine cobalt and the compound of phthalocyanine cobalt and...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01D53/86B01D53/48
Inventor 胡冬华袁绪富李宝利
Owner 李宝利
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