Recycling method of inactivated hydrogenation catalyst
A hydrogenation catalyst and catalyst technology, which are applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as adverse effects, poor economy, and aggregation of active metals, and improve hydrogenation activity. , The effect of improving denitrification performance and dispersion degree
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Embodiment 1
[0029] Get deactivated hydrotreating catalyst A, its carbon deposition content is 2.2wt%, active metal component is composed as follows: MoO 3 content of 24.8wt% and NiO content of 4.2wt%, the deactivated catalyst was added to the methyl phosphoric acid ester solution, the weight ratio of methyl phosphoric acid ester to the catalyst was 2:100, the catalyst was put into an atmosphere furnace for heat treatment, and the Under nitrogen, heat up to 400°C, treat at a constant temperature for 2 hours, continue to heat up to 500°C at a heating rate of 15°C / min, treat at a constant temperature for 0.5 hours, cool down to room temperature, and use nickel citrate (citric acid and nickel nitrate according to mole Ratio 1.2:1 configuration) solution impregnation, so that metallic nickel accounts for 3.5% of the weight of the finished catalyst (calculated as nickel oxide). Then put it into an atmosphere furnace for heat treatment, raise the temperature to 200° C. under a nitrogen atmospher...
Embodiment 2
[0031] Take the deactivated hydrotreating catalyst A, add the deactivated catalyst to the dimethyl phosphate solution, the weight ratio of dimethyl phosphate to the catalyst is 3:100, put the catalyst into an atmosphere furnace for heat treatment, and heat up under nitrogen to 400°C, treated at constant temperature for 2 hours, continued to heat up to 530°C at a heating rate of 18°C / min, treated at constant temperature for 0.2 hours, cooled to room temperature, and then immersed in ammonium acetate solution (concentration: 15wt%), the ammonium acetate solution The amount is 10 wt% of the catalyst weight. The catalyst was heat-treated in an air-blast drying oven at 80°C for 3 hours, and the intermediate product was impregnated with a solution of nickel citrate (citric acid and nickel nitrate were configured at a molar ratio of 1:1), so that the metal nickel accounted for 2.0% of the weight of the finished catalyst (according to Nickel oxide calculation). Then put it into an at...
Embodiment 3
[0033] Get the deactivated hydrogenation treatment catalyst A, add the glycerin solution of dioctyl phosphate to the deactivated catalyst, the weight ratio of dioctyl phosphate and the catalyst is 3:100, the catalyst is put into the atmosphere furnace and carry out heat treatment, under nitrogen The temperature was raised to 380°C at low temperature, treated at constant temperature for 3 hours, continued to heat up to 550°C at a heating rate of 15°C / min, treated at constant temperature for 0.3 hours, cooled to room temperature, and the intermediate product was impregnated with EDTA nickel solution (EDTA and nickel nitrate according to the molar ratio 1.2:1 configuration) solution impregnation, so that metallic nickel accounts for 4.0% of the weight of the finished catalyst (calculated as nickel oxide). Then put it into a vacuum oven for heat treatment with a vacuum degree of -0.08MPa, raise the temperature to 150°C, and treat at a constant temperature for 3 hours to obtain cata...
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