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    • 37. 发明授权
    • Method for the preparation of fine hollow glass spheres coated with
titanium oxide
    • 制备涂有氧化钛的细中空玻璃球的方法
    • US6110528A
    • 2000-08-29
    • US252937
    • 1999-02-19
    • Kunio KimuraDae-Yong Shin
    • Kunio KimuraDae-Yong Shin
    • C03C11/00C03C17/25B05D7/00
    • C03C11/002C03C17/256C03C2217/212C03C2218/111
    • Disclosed is a method for the preparation of fine hollow glass spheres coated with titanium dioxide from particles of a volcanic vitreous deposit sand occurring in nature. The method comprises the steps of: (a) dispersing the starting particles in an aqueous medium containing hydrogen chloride (or sulfuric acid) and titanium chloride (or titanium sulfate); (b) admixing the aqueous dispersion of the particles with an aqueous alkaline solution such as a solution of ammonium hydrogencarbonate to effect hydrolysis of the titanium chloride (or sulfate) into hydrous titanium oxide forming a coating layer on the particles; and (c) subjecting the particles coated with hydrous titanium oxide to a heat treatment for expansion of the vitreous particles into hollow glass spheres with simultaneous conversion of the hydrous titanium oxide into titanium dioxide forming a coating layer on the hollow glass spheres.
    • 本发明公开了一种由自然界发生的火山玻璃沉积物砂粒子制备二氧化钛的细中空玻璃球的方法。 该方法包括以下步骤:(a)将起始粒子分散在含有氯化氢(或硫酸)和氯化钛(或硫酸钛)的水性介质中; (b)将颗粒的水分散液与碱性碳酸氢钠水溶液等水溶液混合,使氯化钛(或硫酸盐)水解成水合二氧化钛,形成颗粒上的涂层; 和(c)使用水合二氧化钛涂覆的颗粒进行热处理,以将玻璃质颗粒膨胀到中空玻璃球体中,同时将水合氧化钛转化成二氧化钛,形成中空玻璃球上的涂层。