C4 selective hydrogenation catalyst and preparation method thereof
A technology for selective hydrogenation and catalyst, applied in catalyst activation/preparation, hydrocarbons, chemical instruments and methods, etc., can solve the problem of difficult to accurately control the palladium content of the catalyst, insufficient adhesion of the catalytic active coating, and metal particles in the reaction medium. pollution and other problems, to achieve the effect of shortening the preparation cycle, suitable for large-scale production, and reducing the emission of gas pollutants
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Embodiment 1
[0055] Preparation of vector
[0056] Using lanthanum-modified alumina as the carrier, wherein the content of lanthanum in the carrier is 2%, the alumina is calcined at 1190°C, and the specific surface area of the carrier is determined to be 39m 2 / g.
Embodiment 2
[0058] Preparation of Catalyst A
[0059] Preparation 70ml pH is the palladium chloride solution (using sodium carbonate solution to adjust its pH value) of 4.0, takes by weighing the aluminum oxide carrier 100g among the embodiment 1, to the palladium chloride solution that the aluminum oxide carrier sprays configuration, leave standstill 20 Minutes later, take a mixed solution prepared by 20ml of deionized water and 20ml of isopropanol, pour it into the carrier loaded with Pd, disperse evenly, and pour out the excess solution. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 h to obtain catalyst A with a Pd content of 0.30 wt%.
Embodiment 3
[0061] Preparation of Catalyst B
[0062] Preparation 70ml pH is the palladium chloride solution (using sodium carbonate solution to adjust its pH value) of 4.0, takes by weighing the alumina carrier 100g among the embodiment 1, sprays the configured palladium chloride solution to the alumina carrier, after drying Place in an oven at 120°C to dry for 24 hours, then configure 70ml of silver nitrate solution (silver content is 0.50%), spray the configured palladium chloride solution to the alumina carrier containing palladium, let it stand for 20 minutes, and take 20ml The mixed solution prepared by water and 20ml of isopropanol was poured into the carrier loaded with Pd and Ag, and the excess solution was poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst B with a Pd content of 0.3% and an Ag content of 0.1%. ...
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