Method for preparing hydrogenation refined catalyst from waste catalyst
A waste catalyst and hydrorefining technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the recovery of one or two of them, catalyst Problems such as poor activity stability and incomplete metal recovery can achieve the effects of improving recovery and utilization rate, novel process technology, and reducing investment and operating costs.
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Embodiment 1
[0029] Waste Ni / Al 2 o 3 Hydrofining catalyst (containing 40.9wt% NiO, 1.58wt% C, 5.02wt% S, 0.12wt% Fe, the rest being Al 2 o 3 ) 100g was treated at a constant temperature of 550°C for 4 hours, and crushed until the particles were less than 120 mesh and more than 95%; then added 1000ml of concentrated sulfuric acid (98% by weight), and stirred at a constant temperature at 30°C until the solid was almost completely dissolved, which took about 4h , filter and collect the filtrate, add ammonia water to adjust the pH of the filtrate to 6.0, and add dropwise the weight concentration of 30% Na in the filtrate 2 CO 3 Solution, control the pH value of the precipitation process to be about 9.0, control the temperature of the precipitation process to about 50°C, age at 50°C for 4 hours after complete precipitation, filter, and wash three times with 3000ml deionized water, and dry the filter cake at 110°C for 4 hours, , to obtain 83 grams of solid, add 3 grams of concentrated nitri...
Embodiment 2
[0031] Waste Ni / Al used in embodiment 1 2 o 3 Catalyst 100g, after 3.5 hours of constant temperature treatment at 580°C, pulverized to particles less than 70 mesh and more than 95%; then add 900ml of concentrated sulfuric acid (98% by weight) and concentrated hydrochloric acid (33% by weight) mixed solution, the volume ratio is 1 : 1, stirred at a constant temperature at 40°C until almost all the solids were in solution, about 4.5h was needed, the filtrate was collected by filtration, and ammonia water was added to adjust the pH of the filtrate to keep 5.5, and the Na 2 CO 3 Solution, keep the pH value at 8, temperature at 40°C, age at 40°C for 5 hours after precipitation, filter, and wash with 3000ml deionized water three times, dry the filter cake at 110°C for 4 hours, press into tablets, and then pass through 550°C After calcination for 5 hours, 85 grams of solid was obtained, which was the catalyst of the present invention, and its serial number was C-2. The physicochemi...
Embodiment 3
[0033] With the waste Ni / Al used in embodiment 1 2 o 3100g of hydrorefining catalyst was treated at 550°C for 4 hours at a constant temperature, and crushed to a particle size of less than 250 mesh and more than 95%; then add 900ml of concentrated hydrochloric acid (35% by weight) and concentrated nitric acid (65% by weight) mixed solution, the volume ratio 3:1, stir at a constant temperature at 50°C until the solid is almost completely in solution, it takes about 3.5 hours, collect the filtrate by filtration, add ammonia water to adjust the pH of the filtrate to maintain 6.5, and add Na 2 CO 3 Solution, until the pH value is 10, the temperature is 60 ° C, after precipitation, it is aged at 60 ° C for 5 h, filtered, and washed three times with 3000 ml deionized water, the filter cake is dried at 110 ° C for 4 h and roasted at 550 ° C for 5 h to obtain a solid 88 grams, compressed into tablets, is the catalyst of the present invention, its number is C-3, and the physicochemic...
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