Solid base catalyst for synthesizing dimethyl carbonate, its preparing process and use thereof
A technology of solid base catalyst and dimethyl carbonate, which is applied in the direction of organic carbonate preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst active component loss, catalyst activity decline, etc., and achieve easy separation , the rate of inactivation is reduced, and the effect of excellent stability
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Embodiment 1
[0021] Prepare 0.1M ZrOCl separately 2 solution, 0.1M KF solution, 0.1MCaCl 2 solution and 20% (volume content) ammonia solution; under continuous heating and stirring, the ZrOCl 2 The solution and ammonia water were added dropwise into the beaker at the same time, the temperature was controlled at 30°C, and the pH value of the precipitate was 10. After the precipitation is complete, CaCl 2 And KF solution and drip into the beaker, aged for 2 hours, washed repeatedly until no Cl -1 Detection; the washed precipitate was baked at 105°C for 12 hours, and then baked in a muffle furnace at 500°C for 4 hours to obtain a catalyst. CaF in the catalyst 2 The content is 15wt%, zirconia 85.0wt%.
[0022] The catalyst is crushed into 2-1.2mm (10-20 mesh) and applied to the catalytic rectification device. Under normal pressure, the temperature of the reaction section is controlled by an external heat source to be 120°C, the temperature of the bottom of the tank is 110°C, the temperat...
Embodiment 2
[0024] CaF in the catalyst 2 The content is 20% (wt). Prepare 0.15M ZrOCl separately 2 solution, 0.15MKF solution, 0.15MCaCl 2 solution and 30% (volume content) ammonia solution; under continuous heating and stirring, the ZrOCl 2 The solution and ammonia water were added dropwise into the beaker at the same time, the temperature was controlled at 40°C, and the pH value of the precipitate was 10. After the precipitation is complete, CaCl 2 And KF solution and drip into the beaker, aged for 2 hours, washed repeatedly until no Cl -1 Detection; the washed precipitate was baked at 110°C for 12 hours, and then baked in a muffle furnace at 600°C for 4 hours to obtain a catalyst. CaF in the catalyst 2 The content is 20wt%, zirconia 80wt%.
[0025] The catalyst is crushed into 2-1.2mm (10-20 mesh) and applied to the catalytic rectification device. Under normal pressure, the temperature of the reaction section is controlled by an external heating source to be 140°C, the temperat...
Embodiment 3
[0027] Prepare 0.15M ZrOCl separately 2 solution, 0.15M KF solution, 0.15MCaCl 2 solution and 30% (volume content) ammonia solution; under continuous heating and stirring, 0.15M ZrOCl 2 The solution and ammonia water were added dropwise into the beaker at the same time, the temperature was controlled at 40°C, and the pH of the precipitate was 11. After the precipitation is complete, CaCl 2 And KF solution and drip into the beaker, aged for 2 hours, washed repeatedly until no Cl -1 Detection; the washed precipitate was baked at 110°C for 12 hours, and then baked in a muffle furnace at 600°C for 4 hours to obtain a catalyst. CaF in the catalyst 2 The content is 25wt%, zirconia 75wt%.
[0028] The catalyst is crushed into 2-1.2mm (10-20 mesh) and applied to the catalytic rectification device. Under normal pressure, the temperature of the reaction section is controlled by an external heat source to 100°C, the temperature of the bottom of the tank is 120°C, the temperature of...
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