Method for regenerating carbonyl sulfide hydrolysis catalyst after inactivation
A hydrolysis catalyst, carbonyl sulfide technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of insignificant adsorption of COS, incomplete use of catalysts, etc., achieving low cost, energy saving, The effect of low roasting temperature
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Embodiment 1
[0033] A. Wash 2 g of the deactivated catalyst with distilled water for 20 minutes on a conventional ultrasonic instrument at a temperature of 30°C and a frequency of 40KHz, and then dry it at 60°C for 12 hours;
[0034] B. Under the same ultrasonic-assisted conditions as above, the catalyst after step A was impregnated with an impregnating solution for 40 minutes, and then dried at a temperature of 70°C for 11 hours. The impregnating solution was a mixture of 7 g of NaOH and 5.2995 g of Na 2 CO 3 The solution obtained by being dissolved in 50ml of water;
[0035] C. Place the catalyst obtained in step B in a muffle furnace, roast it for 2 hours at 350°C, and control the temperature rise rate to 5°C / min to obtain a regenerated catalyst, whose activity is shown in figure 1 .
Embodiment 2
[0037] A. Wash 2 g of the deactivated catalyst with distilled water for 30 minutes on a conventional ultrasonic instrument with the aid of ultrasonic waves at a temperature of 30°C and a frequency of 28KHz, and then dry it at 80°C for 11 hours;
[0038] B. The catalyst after drying in step A is impregnated with impregnating solution for 20 minutes under the same ultrasonic assisted conditions as above, and then dried at 60° C. for 12 hours. The impregnating solution is 7 g of NaOH dissolved in 50 ml of water. solution;
[0039] C. Place the catalyst obtained in step B in a muffle furnace, bake it for 1.2h at a temperature of 400°C, and control the heating rate to 5°C / min to obtain a regenerated catalyst, whose activity is shown in figure 2 .
Embodiment 3
[0041] A. Wash 2 g of the deactivated catalyst with distilled water for 40 minutes on a conventional ultrasonic instrument at a temperature of 30°C and a frequency of 40KHz, and then dry it at 70°C for 10 hours;
[0042] B. The catalyst dried in step A is impregnated with impregnating solution for 30 minutes under the same ultrasonic-assisted conditions as above, and then dried at 80°C for 10 hours. The impregnating solution is 5.2995 g of Na 2 CO 3 A solution obtained by dissolving in 50ml of water;
[0043]C. Place the catalyst obtained in step B in a muffle furnace, and bake it for 2 hours at a temperature of 350°C, with a heating rate of 5°C / min, to obtain a regenerated catalyst, whose activity is shown in image 3 .
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