Titanium-based metal-organic framework adsorption material, preparation method therefor and application in separation of palladium
An organic framework and adsorption material technology, applied in the field of titanium-based metal-organic framework adsorption material for selective separation of palladium and the field of preparation thereof, can solve the problems of reduced palladium recovery rate, numerous raw material components, complicated methods and the like, and achieves saving production costs, The effect of shortening material preparation time and simple and easy preparation method
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Embodiment 1
[0025] According to method A, add 140mL of mixed solvent (composed of 100mL of anhydrous DMF and 40mL of anhydrous methanol) into the round bottom flask, then add 11.5g of 2-aminoterephthalic acid and 12.5mL of tetrabutyl titanate in sequence, and heat Stir and reflux at 120°C for 12 hours, cool to room temperature, add 40mL of sodium alginate aqueous solution with a mass concentration of 1% to the mixed solution, mix well, add hydrochloric acid dropwise to adjust the pH value to below 2, and obtain a yellow precipitate by suction filtration, followed by Rinse with washing solution DMF, methanol, water, and acetone, and dry the obtained solid under vacuum at 100°C for 8 hours to prepare a titanium-based metal-organic framework adsorption material, labeled as Ti-MOF1.
Embodiment 2
[0027] The operation steps are the same as in Example 1, the difference is that when preparing the titanium-based metal-organic framework adsorption material, 11 mL of isopropyl titanate is used as the titanium metal source instead of tetrabutyl titanate, and the finally obtained titanium-based metal-organic framework adsorption material is labeled For Ti-MOF2.
Embodiment 3
[0029] According to method B, 5.5g of 2-aminoterephthalic acid and 2.5mL of tetrabutyl titanate were added to a mixed solvent consisting of 20mL of anhydrous DMF and 20mL of anhydrous methanol, ultrasonically dispersed for 10 minutes, and the mixed solution was transferred to In a stainless steel reaction kettle equipped with a polytetrafluoroethylene liner, stand at 150°C for 16 hours, cool to room temperature and then centrifuge. The obtained yellow precipitate is soaked with washing liquid DMF and methanol in turn, and then placed in a vacuum drying oven Vacuum dry at 100°C for 12 hours; ultrasonically disperse the dried solid in 50mL of water, add 10mL of sodium alginate aqueous solution with a mass concentration of 0.5% to the dispersion, add hydrochloric acid dropwise to adjust the pH value to below 2, and continue stirring for 12 hours , the solid obtained after suction filtration was soaked with washing liquid water and acetone in turn, and then vacuum-dried at 100°C fo...
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