Ink-jet printing assisted iron-molybdenum catalyst for preparing formaldehyde through methanol oxidation as well as preparation and application of iron-molybdenum catalyst
An inkjet printing and catalyst technology, used in metal/metal oxide/metal hydroxide catalysts, oxidation to prepare carbonyl compounds, physical/chemical process catalysts, etc. Catalyst performance decline and other problems, to achieve the effect of increasing the contact area, slowing down the loss, and improving the service life
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Embodiment 1
[0019] First, dissolve 55 g of ammonium heptamolybdate in 250 ml of deionized water, heated to 60 °C, diluted 15 mL mass concentration of 68% concentrated nitric acid to 250 ml heated to 60 °C; Then dissolve 52.5 g of iron nitrate into 250 ml of deionized water and also heat to 60 °C. Using charge modulation continuous inkjet printing technology, the original red, yellow and blue liquid raw materials on the printer are replaced by the above three solutions, using the same spraying speed of 1 μL / s, microscopic reaction mixing, and the sample sprayed by the nozzle is directly sprayed into the collection tank with a stirring rod; Subsequently, it was aged for 8h at 120 °C, then separated by suction filtration, and dried overnight at 80 °C. Subsequently, the calcination treatment was carried out at 400 °C for 6 h to obtain a ferromolybdenum catalyst (MoO 3 -Fe 2 (MoO 4 ) 3 )。
Embodiment 2
[0022] Example 2: Different inkjet printing techniques (microvoltage random inkjet printing technology)
[0023] First, dissolve 55 g of ammonium heptamolybdate in 250 ml of deionized water, heated to 60 °C, diluted 15 mL mass concentration of 68% concentrated nitric acid to 250 ml heated to 60 °C; Then dissolve 52.5 g of iron nitrate into 250 ml of deionized water and also heat to 60 °C. Using the microvoltage random inkjet technology, the original red, yellow and blue liquid raw materials on the printer are replaced by the above three solutions, and the same spray speed of 10μL / s is used for microscopic reaction mixing, and the samples sprayed by the nozzle are directly sprayed into the collection tank with a stirring rod; The pH of the mixed slurry was controlled at 1.5, followed by 8h aging at 120 °C, then extracted filtration and separation, and dried overnight at 80 °C, followed by calcination treatment at 400 °C for 6 h to obtain a ferromolybdenum catalyst (MoO) that can be...
Embodiment 3
[0024] Example 3: Different inkjet printing techniques (hot bubble type random inkjet printing technology)
[0025] First, dissolve 55 g of ammonium heptamolybdate in 250 ml of deionized water, heat to 60 °C, dilute 15 mL mass concentration of 68% concentrated nitric acid to 250 ml, heat to 60 °C; Then dissolve 52.5 g of iron nitrate into 250 ml of deionized water and also heat to 60 °C. Using the hot bubble type random inkjet printing technology, the original red, yellow and blue liquid raw materials on the printer are replaced by the above three solutions, and the microscopic reaction is mixed with the same spray speed of 0.1 μL / s, and the samples sprayed by the nozzle are directly sprayed into the collection tank with a stirring rod; The pH of the mixed slurry was controlled at 1.5, followed by 8h aging at 120 °C, then extracted filtration and separation, and dried overnight at 80 °C, followed by calcination treatment at 400 °C for 6 h to obtain a ferromolybdenum catalyst (MoO)...
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