A kind of preparation method and application of α-manganese oxide supported cobalt strontium catalyst
A catalyst, manganese oxide technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of complete catalytic elimination of benzene series reaction temperature and high temperature
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Embodiment 1
[0017] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:
[0018] KAc with a concentration of 0.1mol / L and 0.1mol / LHAc are mixed into a buffer solution according to the ratio of KAc / HAc molar ratio=0.1, and the pH=3.74 is adjusted, and then 0.01g of SrSO 4 and 0.29gCo(NO 3 ) 2 ·6H 2 O was dissolved in the above 40ml acetic acid buffer solution. Add the above buffer solution containing metal salts to 24ml1.0mol / LMnSO 4 solution, mix well. Then 120ml concentration is 0.1mol / LKMnO 4 The solution was dropped into the above mixed solution, in which KMnO 4 / MnSO 4 (molar ratio) = 0.5, stirred for 2 hours, sealed and aged for 12 hours, refluxed at 80°C for 20 hours, rotary steamed for 3 hours until powdery, washed with deionized water until neutral, dried at 100°C for 10 hours, and then ground into powder to obtain a black precursor. Take the above precursor and pure ethanol at a ratio of 8g: 200ml and mix. The mi...
Embodiment 2
[0021] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:
[0022] Mix KAc with a concentration of 0.1mol / L and 0.1mol / LHAc at the ratio of KAc / HAc molar ratio = 1.0 to form a buffer solution, adjust the pH to about 4.74, and then add 0.02g of SrSO 4 and 1.00gCo(NO 3 ) 2 ·6H 2 O was dissolved in the above 40ml acetic acid buffer solution. 0.5g of polyvinyl alcohol PVA (molecular formula (C2 h 4 O) n , molecular weight 20000) dissolved in 30ml concentration is 1.3mol / LMnSO 4 solution, the above buffer solution containing metal salts was added to 40ml1.0mol / LMnSO 4 solution, mix well. Then 140ml concentration is 0.2mol / LKMnO 4 The solution was dropped into the above mixed solution, in which KMnO 4 / MnSO 4 (molar ratio) = 0.7, stirred for 2 hours, sealed and aged for 12 hours, refluxed at 90°C for 23 hours, rotary steamed for 3 hours until powdery, rinsed with deionized water until neutral, dried at 110°C for 1...
Embodiment 3
[0025] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:
[0026] KAc with a concentration of 0.1mol / L and 0.1mol / LHAc are mixed into a buffer solution according to the ratio of KAc / HAc molar ratio = 5.0, and the pH is adjusted at about 5.44, and then 0.03g of SrSO 4 and 2.50gCo(NO 3 ) 2 ·6H 2 O was dissolved in the above 40ml acetic acid buffer solution. 1.8g of polyvinyl alcohol PVA (molecular formula (C 2 h 4 O) n , molecular weight 20000) dissolved in 40ml concentration is 1.5mol / LMnSO 4 In the solution, add the above buffer solution containing metal salts into this solution, and mix well. Then 160ml concentration is 0.3mol / LKMnO 4 The solution was dropped into the above mixed solution, in which KMnO 4 / MnSO 4 (molar ratio)=0.8, stirred for 3 hours, sealed and aged for 12 hours, refluxed at 110°C for 26 hours, rotary steamed for 4 hours until powdery, washed with deionized water until neutral, dried at ...
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