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    • 9. 发明申请
    • COMPOSITE MATERIAL FOR AUTOMOTIVE CATALYST APPLICATIONS AND METHOD OF MANUFACTURING
    • 汽车催化剂应用的复合材料及其制造方法
    • WO2006070201A2
    • 2006-07-06
    • PCT/GB2005/005108
    • 2005-12-30
    • MAGNESIUM ELEKTRON LIMITEDDARAB, John, G.
    • DARAB, John, G.
    • C01G25/00B01J23/00B01J23/10
    • C01G25/00B01J23/002B01J23/10B01J2523/00C01G25/006C01P2006/12C01P2006/13B01J2523/31B01J2523/48B01J2523/3712B01J2523/3718B01J2523/3706B01J2523/12B01J2523/62
    • An improved method for the formation of composite hydroxides or oxides comprising, on an oxide basis, A1 2 0 3 and Zr0 2 , and optionally Ce0 2 , La 2 0 3 , Nd 2 0 3 , Pr 6 0 11 , Sm 2 0 3 , Y 2 0 3 , and other rare earth oxides, comprising the steps of preparing an aqueous metal salt solution and forming a hydroxide precipitate slurry by combining the aqueous metal salt solution with an aqueous solution of a caustic alkali at a pH greater than 8.5 to precipitate out all the metal species. The variation in pH during the precipitation reaction is +/- 1. The invention also relates to composites formed by this method comprising 20-70wt% A1 2 0 3 , 10-77wt% Zr0 2 , 0-34wt% Ce0 2 and 0-22wt% REOs other than Ce0 2 , and to composites per se comprising, on an oxide basis, 42-70wt% A1 2 0 3 , 10-48wt% Zr0 2 , 2-34wt% Ce0 2 and 0-9wt% REOs other than Ce0 2 and having the following properties after heating to 850 °C over four hours and holding at 850 °C for four hours then allowing to cool to ambient temperature: - a surface area after aging at 950 °C for 2 hours equal to or greater than 60 m 2 /g, and - a surface area after aging at 1100 °C for 2 hours equal to or greater than 30 m 2 /g.
    • 一种用于形成复合氢氧化物或氧化物的改进方法,其包含基于氧化物的Al 2 O 3 N 3和ZrO 2 N,以及任选的CeO 2 2 2 3 3, > 6 2 3 3 3 < 包括以下步骤:通过将金属盐水溶液与苛性碱水溶液在大于8.5的pH下混合而制备金属盐水溶液并形成氢氧化物沉淀物浆料,以沉淀出 所有金属物种。 沉淀反应期间pH的变化为+/- 1。本发明还涉及通过该方法形成的复合材料,其包含20-70wt%的Al 2 O 3 3,10- 77重量%的ZrO 2,0-34重量%的CeO 2和0-22重量%的除CeO 2以外的REO,以及复合材料本身包括, 基于氧化物,42-70重量%的Al 2 O 3 3,10-48重量%的Zr 2/2,2-34重量%的CeO 2, 2%和0-9wt%的除CeO 2 2以外的REO,并且在四小时内加热至850℃并在850℃保持4小时后具有以下特性,然后冷却至 环境温度: - 在950℃下老化2小时以上等于或大于60m 2 / g的表面积, - 1100℃下老化2小时后的表面积等于 或大于30m 2 / g。