Formaldehyde gas oxidation catalyst under room temperature
A technology of formaldehyde gas and catalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of complex raw material preparation methods and high technical requirements, and achieve preparation The raw materials are cheap, the dosage is small, and the preparation raw materials are easy to obtain.
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Embodiment 1
[0016] Dissolve 100 grams of manganese nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of manganese nitrate and sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 1% Pt solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.
Embodiment 2
[0018] Dissolve 100 grams of nickel nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of nickel nitrate to sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 1% Au solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.
Embodiment 3
[0020] Dissolve 100 grams of nickel nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of nickel nitrate to sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 0.5% Au-0.5% Pd solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.
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