Catalysts for the oxidation of durene
An oxidation catalyst, durene technology, applied in the direction of physical/chemical process catalysts, heterogeneous catalyst chemical elements, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high yield of homoanhydride and Low yield and other problems, to achieve the effect of improving activity and stability, increasing yield
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Embodiment 1
[0026] Weigh 96g of oxalic acid and 375ml of distilled water in a flask, stir and heat up to 82°C, and prepare an oxalic acid solution after all the oxalic acid is dissolved. Add 1 part of vanadium ammonium metavanadate to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of iron oxide and 0.4 part of molybdenum nitrate into the solution, and continue stirring evenly to obtain a catalyst precursor. After the catalyst precursor is filtered and dried, it is loaded into a spraying machine and evenly sprayed on the inert carrier silicon carbide. The inert carrier sprayed with the catalyst precursor was baked in a muffle furnace at 530°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 530°C and a space velocity of 5150h -1 Next, it was evaluated in a fixed-bed reactor, and the average anhydride yield was measured to be 74.0%. The evaluation results are shown in Table 1.
Embodiment 2
[0028] Weigh 96g of oxalic acid and 375ml of distilled water in a flask, stir and heat up to 82°C, and prepare an oxalic acid solution after all the oxalic acid is dissolved. Add 1 part of vanadium ammonium metavanadate to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of iron oxide and 0.4 parts of sodium chloride into the solution, and continue stirring evenly to obtain a catalyst precursor. After the catalyst precursor is filtered and dried, it is loaded into a spraying machine and evenly sprayed on the inert carrier silicon carbide. The inert carrier sprayed with the catalyst precursor was baked in a muffle furnace at 530°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 530°C and a space velocity of 5150h -1 Next, it was evaluated in a fixed-bed reactor, and the average anhydride yield was measured to be 73.9%. The evaluation results are shown in Table 1.
Embodiment 3
[0033] Weigh 96g of oxalic acid and 375ml of distilled water in a flask, stir and heat up to 82°C, and prepare an oxalic acid solution after all the oxalic acid is dissolved. Add 1 part of vanadium ammonium metavanadate to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of cobalt nitrate and 0.4 part of ammonium molybdate into the solution, and continue stirring to obtain a catalyst precursor. After the catalyst precursor is filtered and dried, it is loaded into a spraying machine and evenly sprayed on the inert carrier silicon carbide. The inert carrier sprayed with the catalyst precursor was baked in a muffle furnace at 530°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 530°C and a space velocity of 5150h -1 Next, it was evaluated in a fixed bed reactor, and the average anhydride yield was measured to be 74.4%. The evaluation results are shown in Table 1.
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