Catalyst for the oxidation of durene to homoanhydride
A technology for the synthesis of durene and homoanhydride, applied in the direction of physical/chemical process catalysts, organic chemistry, chemical instruments and methods, etc., can solve the problems of low yield of homoanhydride and high yield of homoanhydride, and achieve improved activity and stability performance, and the effect of increasing the yield
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Embodiment 1
[0026] Weigh 98g of oxalic acid and 400ml 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 part of vanadium pentoxide to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of dichlorosilane and 0.4 parts of germanium oxide 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 535°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 525°C and a space velocity of 5250h -1 Next, it was evaluated in a fixed bed reactor, and the average anhydride yield was measured to be 74.1%. The evaluation results are shown in Table 1....
Embodiment 2
[0028] Weigh 98g of oxalic acid and 400ml 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 part of vanadium pentoxide to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of dichlorosilane and 0.4 parts of scandium oxide 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 535°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 525°C and a space velocity of 5250h -1 Next, it was evaluated in a fixed-bed reactor, and the average anhydride yield was measured to be 74.2%. The evaluation results are shown in Table 1. ...
Embodiment 3
[0033]Weigh 98g of oxalic acid and 400ml 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 part of vanadium pentoxide to the prepared oxalic acid solution and continue stirring to obtain ammonium vanadyl oxalate solution. Add 4 parts of methylarsinic acid and 0.4 parts of germanium 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 535°C, and the catalyst was obtained after natural cooling. Catalyst at a reaction temperature of 525°C and a space velocity of 5250h -1 Next, it was evaluated in a fixed bed reactor, and the average anhydride yield was measured to be 74.5%. The evaluation results are shown in Ta...
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