Preparation method of catalyst of oxidation sweetening of oil product
An oxidative desulfurization and catalyst technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of unstable molecular sieve activity, etc., to facilitate adsorption and oxidation, improve polarity, and reduce waste acid. The effect of emissions
Inactive Publication Date: 2009-03-11
TIANJIN UNIV
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Problems solved by technology
However, the activity of activated carbon and molecular sieves prepared by traditional methods is unstable during the reaction process.
Method used
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Embodiment 1
[0020] Measure 10ml of mixed acid solution containing 0.4mol / L formic acid and 0.2mol / L sulfuric acid, and 10ml30% concentration of H 2 o 2 Aqueous solution, after mixing it uniformly in a beaker, weigh 10g of activated carbon and add it, stirring continuously during the adding process to ensure uniform mixing. The mixed solid-liquid system was placed in a 10 kHz ultrasonic generator, treated for 10 minutes, then washed with 100 ml of deionized water to remove the remaining acid, and finally dried to obtain activated carbon catalyst a.
Embodiment 2
[0022] Compared with Example 1, the emission frequency of the ultrasonic wave is adjusted to 100kHz, and the other material consumption and operating conditions are the same as in Example 1, namely activated carbon catalyst b.
Embodiment 3
[0024] Compared with Example 1, the emission frequency of the ultrasonic waves is adjusted to 1000kHz, and the other material consumption and operating conditions are the same as in Example 1 to obtain activated carbon catalyst c.
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The invention relates to a method for preparing a catalyst used for oxidation sweetening of petroleum products. Firstly, an inorganic acid or an inorganic acid salt is mixed with an organic acid according to the molar concentration proportion of 9:1-1:20, so as to obtain mixed acid solution; second, a strong oxidizer is added into the mixed acid solution according to the molar concentration of proportion10:1-1:1 to obtain mixed liquidoid; third, the liquidoid is added with a porous solid substance with high specific surface area and then mixed; fourth, the obtained mixture is dipped, wherein, ultrasonication is adopted during the course of dipping under the conditions that the frequency of ultrasonic is 10-1000kHz and the handling time is 10-100 minutes; at last, the catalyst product is obtained after drying the last mixture. In the invention, the dispersion and oscillation effect of the ultrasonic is used to increase the specific surface area of the catalyst; the oxidizer and the mixed acid solution are used to modify the catalyst so that the oxyhydrogen functional groups can be steadily loaded on the catalyst surface, so as to obtain the polarity of the catalyst surface. The catalyst made by using the method can decrease the usage amount of the organic acid or the structural acid in the course of oxidation sweetening and then greatly decrease the discharge amount of the waste acid.
Description
technical field [0001] The invention relates to a method for preparing a catalyst for oxidative desulfurization of oil products. The catalyst can be applied to catalytic oxidative desulfurization of heavy oil to provide high-quality raw materials for hydrogenation; it can also be used for refining chemical products to obtain ultra-low Sulfur oil. Background technique [0002] Currently, oxidative desulfurization is a very promising method for desulfurization of petroleum products. The basic principle is to increase the polarity of sulfides by oxidizing sulfides such as thiophene in oil to sulfones or sulfoxides, so that it is easier to remove sulfides from petroleum products. Ultrasound, as a clean energy source, has been proven to significantly improve the reaction efficiency of the oxidative desulfurization process. The main reason is that the ultrasonic effect can generate hydroxyl radicals in the reaction system, thereby promoting the oxidative desulfurization process....
Claims
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Login to View More IPC IPC(8): B01J37/02B01J31/02B01J27/00C10G27/00
Inventor 许长春金鑫李鑫钢刘丽艳黄国强夏清
Owner TIANJIN UNIV