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    • 1. 发明授权
    • Process for the preparation of quasi-crystalline boehmites
    • 制备准晶体勃艮第的方法
    • US06506358B1
    • 2003-01-14
    • US09636694
    • 2000-08-11
    • Dennis StamiresPaul O'ConnorGregory PearsonWilliam Jones
    • Dennis StamiresPaul O'ConnorGregory PearsonWilliam Jones
    • C01F700
    • C01F7/448B01J21/04C01F7/34C01F7/36C01P2002/04C01P2002/72
    • The present invention pertains to an improved process for the preparation of quasi-crystalline boehmite. In this improved process a quasi-crystalline boehmite precursor is aged at a pH below 7, prefereably under hydrothermal conditions. It was found that when conducting the preparation processes for quasi-crystalline aluminas described in the prior art at a pH below 7 and under hydrothermal conditions instead of the high pH and thermal aging used in the prior art, QCBs with higher crystallinity are obtained. In the process according to the invention additives may be added to the quasi-crystalline boehmite precursor. This results in a high quality QCB with additives in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of rare earth metals alkaline earth metals, transition metals, actinides, silicon, gallium, boron, and phosphorus.
    • 本发明涉及制备准晶状勃姆石的改进方法。 在这种改进的方法中,准结晶勃姆石前体在pH低于7的条件下老化,优选在水热条件下。 发现在现有技术中描述的准晶体氧化铝的制备方法在pH低于7且在水热条件下代替现有技术中使用的高pH和热老化,获得具有较高结晶度的QCB。 在根据本发明的方法中,可以将添加剂加入到准结晶勃姆石前体中。 这导致具有均匀分散状态的添加剂的高质量QCB。 合适的添加剂是含有选自稀土金属碱土金属,过渡金属,锕系元素,硅,镓,硼和磷的元素的化合物。