Preparation method of catalyst for 2-alkyl anthraqunone and anthraqunone production
A technology of alkyl anthraquinone and catalyst, applied in the field of catalyst preparation, can solve the problems of low selectivity, unsatisfactory yield, low conversion rate of 2-(benzoyl) benzoic acid, etc. Friendly, easy-to-use effects
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[0034] Example one
[0035] Exchange the original beta zeolite molecular sieve powder to acid beta zeolite molecular sieve. Weigh 40 grams of beta zeolite molecular sieve powder into a three-necked flask, then add 200ml 0.4mol / L ammonium nitrate, exchange for two hours at 80℃, exchange twice, dry after exchange, and then put it into the muffle furnace Calcined at 550°C for 4 hours to obtain acid beta zeolite molecular sieve A.
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[0036] Example two
[0037] The acidic beta zeolite molecular sieve A prepared in Example 1 was modified for the second time. Weigh 10 grams of the acidic beta zeolite molecular sieve prepared in Example 1 into a three-necked flask, then add 50ml of 0.5mol / L citric acid, exchange for two hours at 80°C, exchange twice, dry after exchange, and then Put it into a muffle furnace and roast at 550°C for 4 hours to obtain a modified acid beta zeolite molecular sieve B.
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[0038] Example three
[0039] At room temperature, 1.0 g of the catalyst B prepared in Example 2 was added to the reaction vessel. After reaching 256° C., 3.5 g of 2-(4'-ethylbenzoyl)benzoic acid was added to the reactor. After the addition, react for 40 minutes. After cooling slightly, 1,4-dioxane solvent was added to it. The catalyst was separated by centrifugation, and the composition of the obtained reaction liquid was analyzed by liquid chromatography. The conversion rate of 2-(4'-ethylbenzoyl)benzoic acid was 99.5%, and the selectivity of 2-ethylanthraquinone was 99.2%.
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