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发明授权
CN105555713B 二氧化钛颗粒及其制造方法 有权

二氧化钛颗粒及其制造方法
摘要：
本发明提供制造具有所需形貌的二氧化钛颗粒的方法。所述方法包括：提供二氧化钛溶胶并随后干燥该溶胶以提供干燥的二氧化钛颗粒。该方法的特征在于通过施加一个或多个以下条件来控制干燥的二氧化钛颗粒的形貌：(a)由使用硫酸盐法中的沉淀步骤获得的含TiO2浆料制造该二氧化钛溶胶，其中控制沉淀过程中形成的胶束的尺寸；(b)由含TiO2浆料制造该二氧化钛溶胶并控制该浆料的pH以影响该二氧化钛溶胶絮凝的程度；(c)由含TiO2浆料制造该二氧化钛溶胶并调节该二氧化钛的等电点以影响该二氧化钛溶胶絮凝的程度；(d)通过施加热来干燥该二氧化钛溶胶，并控制干燥步骤过程中采用的温度。
摘要（英）：

The present invention provides titania particles which are formed by providing a titania sol and spray drying the titania sol. A morphology of the dried titania particles is controlled by producing the titania sol from a TiO2 containing slurry and controlling the pH of the slurry to be 3 pH units or more from the iso-electric point of the titania by adding a peptizing agent to reduce an extent to which the titania sol is flocculated, or by producing the titania sol from a TiO2 containing slurry and adjusting the iso-electric point to be 3 pH units or more from the pH of the slurry by adding a dispersant to reduce an extent to which the titania sol is flocculated. The titania particles have a continuous exterior convex surface, a diameter of 30 μm or less, a BET specific surface area of 50 m2/g or more, and are porous.

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