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    • 21. 发明申请
    • METHOD OF MAKING MESOPOROUS ZIRCONIUM-BASED MIXED OXIDES
    • 制备介孔氧化锆基混合氧化物的方法
    • WO2017173018A1
    • 2017-10-05
    • PCT/US2017/024895
    • 2017-03-30
    • PACIFIC INDUSTRIAL DEVELOPMENT CORPORATION
    • BORTUN, AnatolySHEPARD, DavidLI, YunkuiWU, WeiLACHAPELLE, Jeffery
    • C01G25/00
    • Mesoporous, zirconium-based mixed oxides and a method of making the same comprises: injecting a polyvalent metal-containing solution into an electrolyte solution to form a mother liquor; forming a precipitate; aging the precipitate in the mother liquor to form the mixed oxides; washing the mixed oxides with an aqueous medium; drying and collecting the mixed oxides. The pH of the electrolyte solution exceeds the isoelectric point for zirconium-based mixed oxides. The mixed oxides exhibit a single particle size distribution, improved Ce02 reducibility in the presence of Rhodium, a decrease in surface area after calcination (800-1 100°C) that is not more than 55%, and a tetragonal/cubic structure after calcination. After calcination at 1 100°C for 10 hours in air, the mixed oxides exhibit a surface area > 25 m2/g, a pore volume > 0.20 cm3/g, an average pore size > 30 nm, and an average crystallite size between 8 -15 nm.
    • 中孔锆基混合氧化物及其制备方法包括:将含多价金属的溶液注入电解质溶液中以形成母液; 形成沉淀物; 老化母液中的沉淀物以形成混合氧化物; 用水介质洗涤混合氧化物; 干燥并收集混合氧化物。 电解质溶液的pH超过锆基混合氧化物的等电点。 混合氧化物表现出单一粒度分布,在铑存在下提高的CeO 2还原性,煅烧后表面积(800-1100℃)不超过55%的降低,以及煅烧后的四方/立方结构 。 在空气中在1100℃下煅烧10小时后,混合氧化物表现出> 25平方米/克,孔体积> 0.20厘米3 /克,平均孔径> 30纳米,平均晶粒尺寸在8-15纳米之间。