Regeneration method of dead catalyst
A waste catalyst and vinyl acetate technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as secondary pollution and a large amount of industrial wastewater, and achieve small secondary pollution and governance Environmental pollution, the effect of particle uniformity
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Embodiment 1
[0018] (1) Weigh 15g of waste catalyst produced during the production of vinyl acetate as raw material, put it into the heating furnace, and the flow rate is 0.3 ~ 0.6m 3 / h Under the protection of nitrogen, heat the material from room temperature to 210±5°C at a heating rate of 10°C / min, hold for 40 minutes, and then continue to heat at a heating rate of 5°C / min to 240±5°C, and hold for 40 minutes;
[0019] (2) After the heat preservation is completed, reduce the nitrogen flow rate to 0.03-0.06m 3 / h, and feed water vapor at the same time, the flow rate is 0.3 ~ 0.5g / min, heat up to 400±5°C at a heating rate of 20°C / min, keep warm for 60min, stop feeding water vapor, keep the nitrogen flow rate unchanged, and then increase the temperature by 20 The heating rate of ℃ / min is heated to 850 ℃, and the temperature is kept for 30 minutes;
[0020] (3) After heat treatment, the material is cooled to room temperature at a cooling rate of 40°C / min, washed with water until the pH valu...
Embodiment 2
[0023] (1) Weigh 10g of spent catalyst and put it into the heating furnace, at a flow rate of 0.6m 3 / h Under nitrogen protection, heat the material from room temperature to 200°C at a heating rate of 10°C / min, and keep it for 60 minutes; then continue heating to 245°C at a heating rate of 5°C / min, and keep it for 30 minutes;
[0024] (2) After the heat preservation is completed, reduce the nitrogen flow rate to 0.05m 3 / h, at the same time feed water vapor, the flow rate is 0.3g / min, heat up to 380°C at a heating rate of 15°C / min, and keep warm for 50min; The heating rate is heated to 800 ° C, and the temperature is kept for 40 minutes;
[0025] (3) The material is cooled, washed with water and dried after heat treatment. The activated carbon supported zinc oxide photocatalyst was obtained.
[0026] Add 0.5 g of the prepared activated carbon-loaded zinc oxide into 300 ml of Congo red solution with a concentration of 70 mg / L, stir to reach equilibrium in the absence of ligh...
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