A high performance vanadium phosphorus oxygen catalyst with nanostructure as well as its preparing method
A high-performance vanadium-phosphorus-oxygen catalyst and nanostructure technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve problems such as the difference in catalytic activity of catalysts
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Embodiment 1
[0021] Add 20 grams of vanadium pentoxide, 160 ml of anhydrous isobutanol and 80 ml of benzyl alcohol into the flask, add 0.54 grams of bismuth nitrate and 0.78 ml of dimethyl sulfoxide at the same time, heat and reflux for 12 hours, add 17.3 ml of 85 wt % phosphoric acid and 1.13 Add 1 gram of polyethylene glycol to the hot reaction mixture, and continue to reflux for 16 hours. After the reaction, a blue solution is obtained. The reaction solution is cooled to room temperature, and the filtrate is washed with 80ml of anhydrous isobutanol, which is filtered out. The mixture was heated to 110°C in an air atmosphere and dried to obtain a blue powder, which is the precursor of the vanadium phosphorus oxygen catalyst.
[0022] Add binder, pore expander and release agent to the catalyst precursor during molding, and improve its mechanical strength by pressure molding. Weigh 12 grams and place it in a miniature fixed-bed reaction tube at a temperature of 400°C and a space velocity o...
Embodiment 2
[0024] Add 20 grams of vanadium pentoxide, 160 ml of anhydrous isobutanol and 40 ml of benzyl alcohol into the flask, add 1.08 grams of bismuth nitrate and 1.56 ml of dimethyl sulfoxide at the same time, heat and reflux for 16 hours, add 17.3 ml of 85 wt % phosphoric acid and 1.51 Add 1 gram of polyethylene glycol to the hot reaction mixture, continue to reflux for 12 hours, obtain a blue solution after the reaction is completed, cool the reaction solution to room temperature, wash the filtrate with 80ml of anhydrous isobutanol, and filter it out The mixture was heated to 110°C in an air atmosphere and dried to obtain a blue powder, which is the precursor of the vanadium phosphorus oxygen catalyst.
[0025] When molding, add an appropriate amount of adhesive, pore-enlarging agent and mold release agent to the catalyst precursor, and increase its mechanical strength through pressure molding. Weigh 12 grams and place it in a miniature fixed-bed reaction tube. At a temperature of ...
Embodiment 3
[0027] Add 20 grams of vanadium pentoxide, 160 ml of anhydrous isobutanol and 40 ml of benzyl alcohol into the flask, add 3.23 grams of bismuth nitrate and 5.47 ml of dimethyl sulfoxide at the same time, heat and reflux for 16 hours, add 17.3 ml of 85 wt% phosphoric acid and 1.89 Add 1 gram of polyethylene glycol to the hot reaction mixture, and continue to reflux for 6 hours. After the reaction, a blue solution is obtained. The reaction solution is cooled to room temperature, and the filtrate is washed with 160ml of anhydrous isobutanol, which is filtered out. The mixture was heated to 110°C in an air atmosphere and dried to obtain a blue powder, which is the precursor of the vanadium phosphorus oxygen catalyst.
[0028] When molding, add an appropriate amount of adhesive, pore-enlarging agent and mold release agent to the catalyst precursor, and increase its mechanical strength through pressure molding. Weigh 12 grams and place it in a miniature fixed-bed reaction tube. At a ...
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