A kind of regeneration method of precious metal catalyst
A technology for catalysts and dehydrogenation catalysts, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. Small temperature change, easy operation, long life effect
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Embodiment 1
[0029] Weigh commercially available alumina carrier (γ phase, spherical, diameter 0.5mm, pore volume 0.71cm 3 / g, specific surface area 224m 2 / g) 30g, add deionized water dropwise to initial moistening, and the volume of consumed water is 27mL. Based on the weight content of 0.4% of the Sn element in the final catalyst, stannous chloride containing 0.12 g of Sn was weighed and dissolved in ethanol, and the volume was adjusted to 27 mL with ethanol. The prepared Sn-containing ethanol solution was added to 30 g of alumina carrier, mixed evenly, and aged at room temperature for 2 hours. Dry at 80°C for 8h, then bake at 600°C for 4h.
[0030] According to 0.5% of the weight content of Pt element in the final catalyst, take 0.18g of Pt-containing chloroplatinic acid and dissolve it in deionized water, set the volume to 27mL, add it to the Sn-containing alumina carrier, mix well, and age at room temperature for 4h. Dry at 100°C for 6h, and bake at 600°C for 4h. The sample obtai...
Embodiment 2
[0033] Weigh commercially available alumina carrier (γ phase, spherical, diameter 0.5mm, pore volume 0.71cm 3 / g, specific surface area 224m 2 / g) 30g, add deionized water dropwise to initial moistening, and the volume of consumed water is 27mL. Based on the weight content of 0.6% of the Sn element in the final catalyst, stannous chloride containing 0.18 g of Sn was weighed and dissolved in ethanol, and the volume was adjusted to 27 mL. The prepared Sn-containing ethanol solution was added to 30 g of alumina carrier, mixed evenly, and aged at room temperature for 4 hours. Dry at 100°C for 6h, then bake at 500°C for 6h.
[0034] According to the weight content of 0.7% of the Pt element in the final catalyst, take 0.12g of Pt-containing chloroplatinic acid and dissolve it in deionized water, set the volume to 27mL, add it to the Sn-containing alumina carrier, mix well, and age at room temperature for 2h. Dry at 120°C for 4h, and bake at 500°C for 6h. The sample obtained in t...
Embodiment 3
[0037] After the C-1 fresh agent reacted for 72 hours, switch the raw material gas to pure hydrogen gas, purging for 1 hour, then the temperature dropped to 450°C, the pressure rose to 8MPa, and then hydrogen and tetralin were introduced at the same time. The speed is 1.5h -1 , the volume ratio of hydrogen to tetralin is 350, and the treatment time is 3h. After the treatment, switch to nitrogen, drop to normal pressure and room temperature, pass through cyclohexane to clean the deactivated catalyst, and then purging at 100°C for 3h in a nitrogen atmosphere. Under a nitrogen atmosphere, raise the temperature of the deactivated catalyst to 550°C, raise the pressure to 0.5MPa, and then feed a mixed gas of carbon dioxide and nitrous oxide. The volume content of nitrous oxide in the mixed gas is 0.5%, and the volume space velocity is 2000h -1 , the processing time is 3h. Obtain C-1 primary regeneration agent.
[0038] The reaction performance of C-1 primary regeneration agent is...
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