Regeneration method of molecular sieve catalyst
A technology of catalyst and molecular sieve, which is applied in the regeneration field of molecular sieve catalysts, can solve the problems such as the inability to regenerate toxic and deactivated molecular sieve catalysts, and achieve the effects of reducing the risk of overheating, improving regeneration efficiency, and realizing activity
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Embodiment 1
[0034] Get the beta molecular sieve catalyst of 10g deactivation synthesis ethylbenzene, the C element content in the deactivation catalyst is 10.6%, the N element content is 0.06%, puts into the fixed bed reactor that internal diameter is 25mm, with 500h -1 The volumetric space velocity is passed into nitrogen, and the temperature is raised at a rate of 40°C / h, so that the temperature of the catalyst bed reaches 120°C, and the temperature is kept at 120°C for 1 hour, and then the temperature is raised to 300°C at 50°C / h, and the temperature is kept at 3 hours, and then 55.6 hours -1 The volume space velocity is passed into air so that the volume content of air in the reactor is 10%, and the temperature rise rate of the catalyst bed is controlled to be 20°C / h, so that the bed temperature is 500°C. catalyst.
[0035] Put the catalyst obtained above into a muffle furnace, raise the temperature to 500° C. at a rate of 100° C. / h, and cool down after roasting at 500° C. for 4 hours...
Embodiment 2
[0037] Get the beta molecular sieve catalyst of 10g deactivation synthesis ethylbenzene, the C element content in the deactivation catalyst is 10.6%, the N element content is 0.06%, puts into the fixed-bed reactor that internal diameter is 25mm, with 20h -1 The volumetric space velocity is passed into nitrogen, and the temperature is raised at a rate of 20°C / h, so that the temperature of the catalyst bed reaches 300°C. -1 The volume space velocity is passed into air so that the volume content of air in the reactor is 10%, and the temperature rise rate of the catalyst bed is controlled to be 20°C / h, so that the bed temperature is 500°C, and the temperature is lowered to 20°C after constant temperature for 8 hours. catalyst.
[0038] Put the catalyst obtained above into a muffle furnace, raise the temperature to 540° C. at a rate of 150° C. / h, and cool down after roasting at 540° C. for 8 hours to obtain a regenerated catalyst. The C element content in the regenerated catalyst i...
Embodiment 3
[0040] Get the beta molecular sieve catalyst of 10g deactivation synthesis ethylbenzene, the C element content in the deactivation catalyst is 10.6%, the N element content is 0.06%, puts into the fixed bed reactor that internal diameter is 25mm, with 1000h -1 The volumetric space velocity is passed into nitrogen, and the temperature is raised at a rate of 50°C / h, so that the temperature of the catalyst bed reaches 300°C, and the temperature is kept at 300°C for 4 hours, and then the -1 Air is introduced at a volumetric space velocity of 500°C, and the amount of nitrogen is adjusted so that the volume content of air in the reactor is 10%. °C, unload the catalyst.
[0041] Put the catalyst obtained above into a muffle furnace, heat up to 600°C at a rate of 200°C / h, and cool down after roasting at 600°C for 4 hours to obtain a regenerated catalyst. The content of C element in the regenerated catalyst is 0.10%, and the content of N element is 0.004%. Under the condition that the...
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