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Method for preparing catalyst for catalytic oxidation of ozone from waste catalyst produced during oil refining and catalyst prepared with method and used for catalytic oxidation of ozone
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A technology for ozone catalytic oxidation and oil refining waste catalysts, which is applied in the fields of heterogeneous catalyst chemical elements, chemical instruments and methods, physical/chemical process catalysts, etc. problems, to avoid pollution, reduce production costs, and save consumption.
Inactive Publication Date: 2016-07-27
BEIJING JINDAYU ENVIRONMENT TECH CO LTD
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However, the magnetic separation method has relatively high requirements on raw materials, and has no ability to deal with heav
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Embodiment 1
[0079] (1) roasting: take a certain amount of spent catalyst after oil refining and place it in a muffle furnace at 600°C for roasting for 3 hours;
[0080] (2) Acid dissolution: cooling the spent catalyst roasted in step (1) to room temperature, placing it in a sulfuric acid solution with a mass concentration of 2% at 50° C. for 1 hour;
[0081] (3) Alkali dissolution: after washing the waste catalyst after step (2) acid dissolution to neutrality, the waste catalyst and sodium hydroxide solution are mixed according to the mass volume ratio of 1:1.5, and soaked for 1 hour;
[0082] (4) Washing: the spent catalyst after step (3) is dissolved in alkali is placed in 50 DEG C of water and washed 3 times;
[0083] (5) Activation: immerse the spent catalyst washed in step (4) in ammonium nitrate solution with a mass concentration of 0.5% for 0.5 hour.
[0084] (6) Drying and pulverizing: putting the spent catalyst activated by step (5) into a 100° C. oven at a constant temperature ...
Embodiment 2
[0088] The difference between the present embodiment and the embodiment 1 lies in the step (7) granulation during implementation. The proportioning of each component in this embodiment is as follows: Fe 3 o 4 1%, MnO 21%, regenerated catalyst 80%, carbon black powder 2%, lime 1%, alumina powder 15%. Stir the above components evenly and put them into the granulator, and take them out when they roll to 2-3mm. The other steps are the same to obtain an ozone catalytic oxidation catalyst.
Embodiment 3
[0090] (1) roasting: take a certain amount of spent catalyst after oil refining and place it in a muffle furnace at 800°C for roasting for 4 hours;
[0091] (2) Acid dissolution: cooling the spent catalyst roasted in step (1) to room temperature, and immersing it in a 2% sulfuric acid solution at 60°C for 2 hours;
[0092] (3) Alkali dissolution: after washing the waste catalyst after step (2) acid dissolution to neutrality, mix the waste catalyst and sodium hydroxide solution according to the ratio of 1:1.5 according to the mass volume ratio, and soak for 2 hours;
[0093] (4) washing: the spent catalyst after step (3) alkali dissolution is placed in the hot water of 80 ℃ and rinses 3 times;
[0094] (5) Activation: immerse the spent catalyst washed with water in step (4) in an ammonium nitrate solution with a mass concentration of 1.5% for 1 hour.
[0095] (6) Drying and pulverizing: putting the spent catalyst activated by step (5) into an oven at 105° C. for 5 hours at a c...
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Abstract
The invention provides a method for preparing a catalyst for catalytic oxidation of ozone from a waste catalyst produced during oil refining and the catalyst prepared with the method and used for catalytic oxidation of ozone. The method comprises steps as follows: (1) calcination; (2) acid dissolution; (3) alkali dissolution; (4) water washing; (5) activation; (6) drying and grinding; (7) granulation. The catalyst is prepared from components in percentage by mass as follows: 2%-14% of an active component, 30%-80% of a regenerated and activated waste catalyst, 2%-20% of a pore-enlarging agent, 1%-10% of a gelatinizing agent and 5%-30% of aluminum oxide powder, wherein the total mass percentage of the components is 100%, and the active component is one or more of MnO2, Co3O4, Fe3O4, Fe2O3, CoO, Sb2O3 and SnO2. A conventional preparation method is used for obtaining the ozone catalyst, pollution of a waste agent to the environment is avoided, the quantity of raw materials for preparation of the catalyst is reduced, and the production cost is reduced; when the generated catalyst and ozone work synergistically to treat waste water, the reaction rate is increased, and organic matters in the waste water can be removed more effectively.
Description
technical field [0001] The invention relates to the fields of waste water treatment and catalyst preparation, in particular to a method for preparing an ozone catalytic oxidation catalyst for treating refractory sewage and the prepared ozone catalytic oxidation catalyst. Background technique [0002] Fluid Catalytic Cracking (FCC) is one of the heavy oil lightening processing technologies commonly used in refineries, and it is also the secondary processing technology with the largest amount of catalyst in the refining industry. With the increasingly heavy and inferior crude oil and the increasing demand for high-quality light oil products, the replacement cycle of catalytic cracking catalysts has been significantly shortened, and the amount of spent catalysts due to factors such as heavy metal deposition, carbon deposition, and high temperature has increased year by year. If a large amount of spent catalysts are discharged directly, it will not only pollute the environment, ...
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