Preparation method for wet oxidation catalyst

A wet oxidation and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, catalyst protection, etc., to achieve the effects of tight combination, high crushing strength, and improved performance and efficiency

Active Publication Date: 2018-12-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides an improved preparation method of wet oxidation catalyst, so that the prepared catalyst can not only resist the poisoning, deactivation and loss of effective components of the catalyst in the coexistence system of various pollutants, but also improve the strength of the catalyst and improve the network structure. Microporous for improved catalyst performance

Method used

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  • Preparation method for wet oxidation catalyst
  • Preparation method for wet oxidation catalyst
  • Preparation method for wet oxidation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Impregnate 20g of activated carbon with 7% fructose and beat to form a slurry with a carbon content of 300g / L, add copper nitrate solution containing 20g of CuO, and gradually add ammonia water to adjust the pH value to 8.0 after ultrasonic vibration for 2 hours. After the precipitation is complete, filter , washing; then the washed material is made into a slurry with a water content of 50% with deionized water, and 8g of cerium nitrate solution is added as CeO, and ultrasonic vibration is performed for 1.5h while stirring, and after direct drying, in an inert gas environment Roast at 600°C for 2 hours; after calcination, the powder is mixed with 10g of manganese nitrate solution (calculated as MnO) to make a slurry with a water content of 30%, after stirring, add 1g of turnip powder, stir for 40min, seal and let stand for 24h, and extrude into a clover shape , coated with 6g nanoscale ZrO after drying 2 , after drying, it was calcined at 650° C. for 7 hours in an inert...

Embodiment 2

[0042] Impregnate 30g of activated carbon with 10% fructose and beat to form a slurry with a carbon content of 100g / L, add copper nitrate solution containing 40g of CuO, ultrasonically oscillate for 2 hours, then gradually add ammonia water to adjust the pH value to 8.0, after the precipitation is complete, filter , washing; then the washed material is made into a slurry with a water content of 50% with deionized water, and cerium nitrate solution of 7g in CeO is added, and ultrasonic vibration is performed for 1.5h while stirring, and after direct drying, in an inert gas environment Roast at 500°C for 3 hours; after calcination, the powder is mixed with 25g of manganese nitrate solution (calculated as MnO) to make a slurry with a water content of 30%, after stirring, add 1g of turnip powder, stir for 40min, seal and stand for 24h, and extrude into a clover shape , coated with 8g nanoscale ZrO after drying 2 , after drying, it was calcined at 550° C. for 5 h in an inert gas en...

Embodiment 3

[0046] Impregnate 30g of activated carbon with 15% glucose and beat to form a slurry with a carbon content of 200g / L, add copper nitrate solution containing 40g of CuO, and gradually add ammonia water to adjust the pH value to 9.0 after ultrasonic vibration for 2 hours. After the precipitation is complete, filter , washing; then the washed material is made into a slurry with a water content of 50% with deionized water, and 5g of cerium nitrate solution is added as CeO, and ultrasonic vibration is performed for 1.5h while stirring, and after direct drying, in an inert gas environment Roast at 550°C for 3 hours; after calcination, the powder is mixed with 15g of manganese nitrate solution (calculated as MnO) to make a slurry with a water content of 30%, after stirring, add 1g of urea, stir for 40min, seal and stand for 24h, extrude into a clover shape, bake After drying, apply 5g nanoscale ZrO 2 , after drying, it was calcined at 550° C. for 5 h in an inert gas environment to ob...

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Abstract

The invention discloses a preparation method for a wet oxidation catalyst. The preparation method includes the following steps: (1) processing active carbon by adopting carbohydrate, and performing pulping; (2) dissolving a copper source precursor into a solution; (2) dissolving a cerium source precursor into a solution; (4) mixing materials prepared by the step (1), (2) and (3), adjusting pH values to form deposition, and performing filtering, washing and drying, and roasting in an inert gas environment so that a powder material can be formed; and (5) mixing the powder material of the step (4) with a manganese source precursor solution into slurry, and adding a pore forming agent after stirring, performing seal standing to form the mixture into a clover shape through extruding after secondary stirring, coating nanometer zirconia after drying, and performing roasting in an inert gas environment to form a wet oxidation catalyst. The prepared wet oxidation catalyst can be used for high concentration organic wastewater, and has characteristics of large specific surface areas, strong sulfur tolerance and stable catalytic activity, etc.

Description

technical field [0001] The invention relates to a preparation method of a composite metal oxide catalyst, in particular to a preparation method of a wet oxidation catalyst. Background technique [0002] Wet (air) oxidation (wet air oxidation, WAO) treatment of high-concentration refractory organic wastewater usually requires higher temperature and pressure (200-3l5°C, 2-21MPa) and longer residence time, and its reaction conditions are very harsh . Catalytic wet air oxidation (CWAO) can reduce the reaction temperature and pressure while maintaining the treatment effect, which greatly promotes the development and application of wet oxidation. Therefore, the development of catalysts with high activity and stability and suitable for CWAO has become the focus and difficulty of current research. In addition to different concentrations of free alkali (NaOH) in oil refining or ethylene waste lye (alkali residue), it also contains a large amount of high-concentration Na2S and organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J33/00C02F1/74C02F101/34C02F101/30
CPCB01J23/8892B01J33/00B01J35/1019B01J35/1042B01J37/0244B01J37/08C02F1/725C02F1/74C02F2101/30C02F2101/34C02F2101/345C02F2101/40
Inventor 杨岳梁宝锋荣树茂李杨巫树锋何琳笪敏峰唐中华张媛王语林
Owner PETROCHINA CO LTD
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