Novel attapulgite supported palladium hydrogenation catalyst and preparation method thereof
A hydrogenation catalyst and attapulgite technology are applied in the field of preparation of attapulgite-supported palladium catalysts, can solve problems such as no reports, and achieve the effects of high selectivity, low cost and small particle size
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[0013] Example 1:
[0014] Weigh a certain mass of attapulgite clay into a beaker, add 4mol / L hydrochloric acid according to a liquid-solid ratio of 8:1, stir magnetically at room temperature for 12h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 2.0 mL of 0.02 mol / L chloropalladium acid aqueous solution into a 150 mL three-necked flask, and then add 50 mL of deionized water, add 528 mg of acidified attapulgite clay under magnetic stirring, and ultrasonically disperse for 2.5 hours , Make the attapulgite evenly dispersed. Then 10 mL of potassium borohydride solution with a concentration of 0.008 mol / L was added dropwise under the action of magnetic stirring, and stirring was continued for 1.5 hours after the addition was completed, so that the chloropalladium acid solution was completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until ...
Example Embodiment
[0019] Example 2:
[0020] Weigh a certain quality of attapulgite clay into a beaker, add 2mol / L nitric acid at a liquid-solid ratio of 10:1, stir magnetically at room temperature for 10h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 1.0 mL of 0.05 mol / L chloropalladium acid aqueous solution into a 150 mL three-necked flask, then add 60 mL of deionized water, add 438 mg of acidified attapulgite clay under magnetic stirring, and ultrasonically disperse for 2 hours. Disperse the attapulgite evenly. Then, 10 mL of potassium borohydride solution with a concentration of 0.01 mol / L is added dropwise under the action of magnetic stirring, and stirring is continued for 1.5 hours after the addition is completed, so that the chloropalladium acid solution is completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until no bubbles are generated. Th...
Example Embodiment
[0024] Example 3:
[0025] Weigh a certain mass of attapulgite clay into a beaker, add 4mol / L hydrochloric acid at a liquid-to-solid ratio of 10:1, stir magnetically at room temperature for 14h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 1.0 mL of 0.1 mol / L potassium chloropalladate aqueous solution into a 150 mL three-necked flask, then add 80 mL of deionized water, add 344 mg of acidified attapulgite clay under magnetic stirring, and disperse ultrasonically for 2 hours , Make the attapulgite evenly dispersed. Then 10 mL of potassium borohydride solution with a concentration of 0.02 mol / L is added dropwise under the action of magnetic stirring, and stirring is continued for 1.5 hours after the addition is completed, so that the potassium chloropalladate in the solution is completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until n...
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