Preparation method and application of hydrotalcite-like derived magnesium aluminate spinel loaded noble metal palladium catalyst
A magnesium-aluminum spinel, palladium catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low temperature activity, high temperature stability and water resistance Problems such as poor steam capacity and uneven distribution of additives can achieve the effects of excellent low temperature activity, abundant pore channels and narrow pore size distribution.
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Embodiment 1
[0038] Dissolve 39.39 g of aluminum nitrate nonahydrate (0.105 mol) in 100 ml of deionized water, stir at room temperature for 30 minutes, and record it as solution A. In a 500ml four-necked flask, 3.71g of anhydrous sodium carbonate (ie 0.035 moles) was dissolved in 100ml of deionized water, and placed in a constant temperature water bath at 35°C and stirred evenly, which was designated as solution B. Dissolve 12g of sodium hydroxide (that is, 0.3 mole) in 150ml of deionized water, and record it as solution C. Add solution A dropwise to solution B, use mechanical stirring, control the rotation speed to 800 rpm, monitor the pH value of the mixed solution in real time, and use solution C to control the pH value to be stable at 10±0.5, when the dropwise addition of solution A is completed, Stirring was stopped, and the temperature of the constant temperature water bath was raised to 70° C. and maintained, and left to age for 12 hours.
[0039] The obtained white suspension was ...
Embodiment 2
[0043] Dissolve 31.51 g of aluminum nitrate nonahydrate (ie 0.084 mol) and 5.39 g of magnesium nitrate hexahydrate (ie 0.021 mol) in 100 ml of deionized water, stir at room temperature for 30 minutes, and record it as solution A. In a 500ml four-necked flask, 3.71g of anhydrous sodium carbonate (ie 0.035 moles) was dissolved in 100ml of deionized water, and placed in a constant temperature water bath at 35°C and stirred evenly, which was designated as solution B. Dissolve 12g of sodium hydroxide (that is, 0.3 mole) in 150ml of deionized water, and record it as solution C. Add solution A dropwise to solution B, use mechanical stirring, control the rotation speed to 300 rpm, monitor the pH value of the mixed solution in real time, and use solution C to control the pH value to be stable at 10±0.5, when the dropwise addition of solution A is completed, Stirring was stopped, and the temperature of the constant temperature water bath was raised to 70° C. and maintained, and left to ...
Embodiment 3
[0048] Dissolve 29.54 g of aluminum nitrate nonahydrate (ie 0.079 mol) and 6.73 g of magnesium nitrate hexahydrate (ie 0.026 mol) in 100 ml of deionized water, stir at room temperature for 30 minutes, and record it as solution A. In a 500ml four-necked flask, 3.71g of anhydrous sodium carbonate (ie 0.035 moles) was dissolved in 100ml of deionized water, and placed in a constant temperature water bath at 35°C and stirred evenly, which was designated as solution B. Dissolve 12g of sodium hydroxide (that is, 0.3 mole) in 150ml of deionized water, and record it as solution C. Add solution A dropwise to solution B, use mechanical stirring, control the rotation speed to 60 rpm, monitor the pH value of the mixed solution in real time, and use solution C to control the pH value to be stable at 10±0.5, when the dropwise addition of solution A is completed, Stirring was stopped, and the temperature of the constant temperature water bath was raised to 70° C. and maintained, and left to a...
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