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Aqueous colloidal dispersion of a compound of cerium and at least one other element chosen from among the rare earths, transition metals, aluminum, gallium and zirconium preparation process and use
Aqueous colloidal dispersion of a compound of cerium and at least one other element chosen from among the rare earths, transition metals, aluminum, gallium and zirconium preparation process and use
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机译:铈与选自稀土,过渡金属,铝,镓和锆的至少一种其他元素的化合物的胶体水分散体的制备方法和用途
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摘要
The invention relates to an aqueous colloidal dispersion of a compound of cerium and at least one other element M chosen from among the rare earths other than cerium; titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminium, gallium and zirconium.;This dispersion is characterized in that it displays a conductivity of at most 5 mS/cm. It is obtained by a process in which there is reacted with a base a mixture of at least one salt of cerium with at least one salt of an element M mentioned above and in the presence of an acid in a quantity such that the atomic ratio H+/(Ce+M) is greater than 0.1, then the precipitate from the preceding reaction is re-dispersed in water.;The dispersions of this type cane be used in catalysis, in lubrication, in ceramics, in the manufacture of luminophorous compounds, in cosmetics and as anticorrosion agents.
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机译:本发明涉及一种铈与至少一种选自铈以外的稀土元素M的化合物的胶态水分散体。钛,钒,铬,锰,铁,钴,镍,铜,锌,铝,镓和锆。该分散体的特征在于其电导率最高为5 mS / cm。它是通过将至少一种铈盐与上述一种元素M的至少一种盐的混合物与碱反应,并在酸的存在下使原子比为H的量与碱反应而获得的。 + Sup> /(Ce + M)大于0.1,然后先前反应的沉淀物重新分散在水中。这种类型的甘蔗分散体可用于催化,润滑,陶瓷中,用于制造发光化合物,化妆品以及用作防腐剂。
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