Preparation method and application of a hydrofluoroolefin hydrogenation catalyst
A technology of hydrogenation catalyst and manufacturing method, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of low selectivity and low activity, and achieve Uniform distribution, high dispersion and small particle size
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Embodiment 1
[0047] (1) Activated carbon pretreatment: The activated carbon is ultrasonically impregnated with 2% hydrochloric acid aqueous solution in an 80°C ultrasonic generator for 4 hours, washed with deionized water after impregnated twice, and added to an aqueous solution containing 2% hydrogen peroxide at a pH of 3 , oxidized for 10 hours under the action of ultrasound, filtered and washed with deionized water until neutral, dried to obtain pretreated activated carbon; (2) impregnation treatment: measure 200ml of pretreated activated carbon and add it to 200g of palladium containing 0.02% Ultrasonic impregnation in dilute palladium dichloride methanol solution, while impregnating, add 200g of concentrated palladium dichloride methanol solution containing 0.2% palladium dropwise, after 2h, continue to impregnate for 1h, filter and wash with methanol, then add to 200g containing 0.02% palladium CeCeCl 3 In the methanol solution, soak for 0.5h under the action of ultrasound, filter an...
Embodiment 2
[0049] (1) Activated carbon pretreatment: the activated carbon is ultrasonically impregnated with 10% aqueous hydrochloric acid in a 50° C. ultrasonic generator for 4 hours, washed with deionized water after impregnated 3 times, and added to an aqueous solution containing 5% hydrogen peroxide at a pH of 1 , oxidized for 5h under the action of ultrasound, filtered and washed to neutral with deionized water, and dried to obtain pretreated activated carbon; (2) impregnation treatment: measure 200ml of pretreated activated carbon and add it to 200g of palladium-containing 0.05% Ultrasonic impregnation in dilute palladium dichloride methanol solution, while impregnating, add 200g of concentrated palladium dichloride methanol solution containing 2% palladium dropwise, after 2h, continue to impregnate for 1h, filter and wash with methanol, then add to 200g containing 0.05% palladium LaCl 3 In the methanol solution, soak for 0.5h under the action of ultrasound, filter and wash with al...
Embodiment 3
[0051] (1) Activated carbon pretreatment: The activated carbon is ultrasonically impregnated with 5% hydrochloric acid aqueous solution in a 60°C ultrasonic generator for 4 hours, washed with deionized water after impregnated 3 times, and added to an aqueous solution containing 3% hydrogen peroxide at a pH of 2 , oxidized under the action of ultrasound for 8h, filtered and washed to neutral with deionized water, and dried to obtain pretreated activated carbon; (2) impregnation treatment: measure 200ml of pretreated activated carbon and add it to 200g of palladium-containing 0.03% Ultrasonic impregnation in dilute palladium dichloride methanol solution, while impregnating, add 200g of concentrated palladium dichloride methanol solution containing 1% palladium dropwise, after 2h, continue to immerse for 2h, filter and wash with methanol, then add to 200g containing 0.03%Pr PrCl 3 In the methanol solution, soak for 1h under the action of ultrasound, filter and wash with alcohol u...
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