Ionic liquid-promoted palladium-based catalyst and application thereof to catalytic hydrogenation and halogenation of unsaturated hydrocarbons
A technology of ionic liquid and palladium catalyst, which is applied in the direction of catalyst activation/preparation, catalytic reaction, physical/chemical process catalyst, etc., can solve the problems of active component loss, high cost, low conversion rate of acetylene, etc., and achieve simple preparation and operation Convenient, highly reactive effect
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Embodiment 1
[0063] Select columnar activated carbon as the carrier, its particle size is 40 mesh, the ash content is 5.0wt%, and the specific surface area is 950m 2 / g, pore volume 0.8mL / g, and treated with 300ml of 10wt% hydrochloric acid at 20°C for 0.5h. Dry at 110°C for 20 hours and set aside. 50ml of H 2 PdCl 4 The solution (wherein the Pd content is 0.001g / ml) is mixed with 2.5g of 1-butyl-3-methylimidazolium chloride salt, and the mixed solution is added dropwise on the 100g activated carbon carrier under the action of ultrasonic waves at 20°C. The immersion time was 6 hours. Then at 30°C, add 10ml of Na to the above system dropwise under the action of ultrasound. 2 S solution (wherein the S content is 0.01g / ml), and 20ml of deionized water, and soaked for 1 hour under the action of ultrasonic waves. The impregnated catalyst was vacuum-dried at 120° C. for 3 hours to obtain catalyst A, wherein the loading of Pd (relative to the mass of the carrier) was 0.05 wt%, the loading of ...
Embodiment 2
[0066] Select columnar carbon nanotubes as the carrier, the particle size is 60 mesh, the ash content is 3.0wt%, and the specific surface area is 450m 2 / g, the pore volume is 0.62mL / g, and it is treated with 300ml of 10wt% hydrochloric acid at 40°C for 20h. Dry at 200°C for 0.5h for later use. 20ml of Na 2 PdCl 4 The solution (wherein the Pd content is 0.05g / ml) is mixed with 25g of N-hexylpyridinium bromide, and the mixture is added dropwise to 100g of carbon nanotube carrier under the action of ultrasonic waves at 60°C, and the immersion time is 6 hours under the action of ultrasonic waves . Then, at 40° C., 10 ml of KHS solution (in which the S content is 0.5 g / ml) and 32 ml of deionized water were added dropwise to the above system under the action of ultrasonic waves, and immersed for 20 hours under the action of ultrasonic waves. The impregnated catalyst was vacuum-dried at 60° C. for 30 hours to obtain the B catalyst, wherein the Pd load (relative to the mass of th...
Embodiment 3
[0069] Select columnar graphene as the carrier, its particle size is 80 mesh, the ash content is 2.1wt%, and the specific surface area is 650m 2 / g, pore volume 0.4mL / g. 10ml of (NH 4 ) 2 PdCl 4 The solution (wherein the Pd content is 0.005g / ml) is mixed with the tetrafluoroborate of 20g of N-butyl-N-methylpyrrolidine, and the mixed solution is added dropwise to the 100g graphene carrier under the action of ultrasonic waves at 20°C On, the immersion time is 4 hours under the action of ultrasonic waves. Then at 20°C, add 10ml of (NH 4 ) 2 S 2 o 3 solution (wherein the S content is 0.01g / ml), and 20ml of deionized water, and soaked for 8 hours under the action of ultrasonic waves. The impregnated catalyst was vacuum-dried at 90° C. for 9 hours to obtain catalyst C, in which the Pd load (relative to the mass of the support) was 0.05 wt%, the load of the S element (relative to the mass of the support) was 0.1 wt%, and the load of the ionic liquid (relative carrier mass) i...
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