Improved titanium-containing catalyst regeneration method
A technology of titanium catalyst and compound, applied in the field of regeneration of titanium-containing catalyst, can solve the problem of high energy consumption, and achieve the effects of improving selectivity, reducing dosage and reducing cost
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Embodiment 1
[0043]5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 90°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 300°C for 6 hours. The evaluation experiment shows that the selectivity of propylene oxide is 97.52%, and the conversion rate of hydrogen peroxide is 39.00%.
Embodiment 2
[0045] 5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 90°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 350°C for 12 hours. The evaluation experiment shows that the selectivity of propylene oxide is 98.02%, and the conversion rate of hydrogen peroxide is 42.00%.
Embodiment 3
[0047] 5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 80°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 300°C for 6 hours. The evaluation experiment shows that the selectivity of propylene oxide is 97.40%, and the conversion rate of hydrogen peroxide is 37.50%.
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