Catalysts for the preparation of partial anhydrides
A catalyst and partial anhydride technology, which is applied in the field of catalysts for the preparation of partial anhydride, can solve the problems of high partial anhydride yield and low partial anhydride yield, and achieve the effect of increasing yield and improving catalyst performance
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Embodiment 1
[0030] Weigh 60g of oxalic acid and 200ml of distilled water in a flask, stir and raise the temperature to 85°C, after the oxalic acid is completely dissolved, make an oxalic acid solution. Add 1 mole fraction of vanadium pentoxide into the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Dissolve 0.4 mole fraction of potassium nitrate in 50 ml of distilled water and add it into the solution, and continue the reaction at 60°C for 1 h. Grinding 8 mole parts of titanium tetrachloride and 20 ml of distilled water was added to the reaction system, and stirred thoroughly to form a slurry to obtain a precursor. Load the catalyst precursor into a spraying machine, and evenly spray it on the inert carrier silicon carbide. The catalyst was calcined at 550°C in a muffle furnace and cooled naturally. Catalyst at a reaction temperature of 400°C and a space velocity of 3000h -1 Next, unimethylene trimethylbenzene: water vapor = 0.05, evalu...
Embodiment 2
[0032] Weigh 60g of oxalic acid and 200ml of distilled water in a flask, stir and raise the temperature to 85°C, after the oxalic acid is completely dissolved, make an oxalic acid solution. Add 1 mole fraction of vanadium pentoxide into the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Dissolve 0.4 mole fraction of ferric nitrate in 50ml of distilled water and add it into the solution, and continue to react at 60°C for 1h. Grinding 8 mole parts of titanium tetrachloride and 20 ml of distilled water was added to the reaction system, and stirred thoroughly to form a slurry to obtain a precursor. Load the catalyst precursor into a spraying machine, and evenly spray it on the inert carrier silicon carbide. The catalyst was calcined at 550°C in a muffle furnace and cooled naturally. Catalyst at a reaction temperature of 400°C and a space velocity of 3000h -1 Next, unimethylene trimethylbenzene: water vapor = 0.05, evaluated in a...
Embodiment 3
[0037] Weigh 60g of oxalic acid and 200ml of distilled water in a flask, stir and raise the temperature to 85°C, after the oxalic acid is completely dissolved, make an oxalic acid solution. Add 1 mole fraction of ammonium metavanadate into the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Dissolve 0.4 mole fraction of sodium nitrate in 50ml of distilled water and add it into the solution, and continue to react at 60°C for 1h. Grinding 8 mole fractions of titanium dioxide and 20 ml of distilled water was added to the reaction system, and stirred thoroughly to form a slurry to obtain a precursor. Load the catalyst precursor into a spraying machine, and evenly spray it on the inert carrier silicon carbide. The catalyst was calcined at 550°C in a muffle furnace and cooled naturally. Catalyst at a reaction temperature of 400°C and a space velocity of 3000h-1 Next, unimethylene trimethylbenzene: water vapor = 0.05, evaluated in a ...
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