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1. 发明授权

US5215580A Process for the production of a fine particle titanium dioxide 失效
标题翻译：生产细颗粒二氧化钛的方法
公开(公告)号：US5215580A
公开(公告)日：1993-06-01
申请号：US835749
申请日：1992-02-06
申请人： Lothar Elfenthal , Edgar Klein , Franz Rosendahl
发明人： Lothar Elfenthal , Edgar Klein , Franz Rosendahl
IPC分类号： C01G23/053 , C09C1/36
CPC分类号： B82Y30/00 , C01G23/0536 , C09C1/3607 , C09C1/3653 , C01P2002/84 , C01P2004/10 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2006/12 , C01P2006/60
摘要： A process produces fine particle titanium dioxide essentially transparent to visible light and essentially UV radiation absorbing. During preparation of the titanium dioxide product, tin dioxide with a particle size of 1 to 10 nm, and preferably 1 to 4 nm, is added, in an amount of 0.5 to 10 weight percent with respect to TiO.sub.2. The particle size of the titanium dioxide is specifically adjusted by the tin dioxide addition. Acicular particles are rounded by heat-treatment between 300.degree. and 800.degree. C., and preferably between 400.degree. and 600.degree. C. The particles can be post-treated to produce a coating of inorganic and/or organic substances. The fine particle titanium dioxide can be prepared by the decomposition of sodium titanate with hydrochloric acid or by suitable hydrolysis of a tetravalent titanium compound which leads to rutile formation. A currently preferred way of adding the tin dioxide is as a colloidal sol which is prepared by the reaction of tin tetrachloride with water at a maximum of 22.degree. C.
摘要翻译：一种方法产生对可见光基本上透明的基本上UV吸收的细颗粒二氧化钛。在二氧化钛制品的制备过程中，相对于TiO 2，添加粒径为1〜10nm，优选为1〜4nm的二氧化锡，其含量为0.5〜10重量％。二氧化钛的粒径通过添加二氧化锡进行了特别的调整。针状颗粒通过在300至800℃之间的热处理，优选在400至600℃之间进行热处理而被倒圆。可以对颗粒进行后处理以产生无机和/或有机物质的涂层。细粒二氧化钛可以通过用盐酸分解钛酸钠或通过适当水解导致金红石形成的四价钛化合物来制备。目前优选的添加二氧化锡的方法是通过四氯化锡与水在最高22℃反应制备的胶体溶胶。

2. 发明授权

US5196181A Process for the production of titanium dioxide 失效
标题翻译：二氧化钛生产工艺
公开(公告)号：US5196181A
公开(公告)日：1993-03-23
申请号：US610126
申请日：1990-11-07
申请人： Achim Hartmann
发明人： Achim Hartmann
IPC分类号： B01J12/02 , C01G23/07
CPC分类号： B01J12/02 , C01G23/07
摘要： A process for the production of titanium dioxide through the reaction of vaporous TiCl.sub.4 with oxygen under a pressure of between 2.4 and 3.4 bar, and a corresponding apparatus are used to achieve long permanent operation times. The oxygen required is indirectly preheated to between 850.degree. and 1000.degree. C. In a reaction chamber closed at one end, configured inside for advantageous flow and lined at least partly with refractories, the indirectly preheated oxygen is further heated by direct contact with very hot combustion gases of an auxiliary flame to temperatures, as is required, for the spontaneous reaction with the TiCl.sub.4 introduced downstream into the reaction chamber. Through an annular passage in the inner peripheral wall of the reaction chamber directly at its front wall, the indirectly preheated oxygen enters the chamber uniformly distributed over its circumference, and the oxygen flow is controlled to obtain a Reynolds' number of between 15,000 and 20,000 in the annular passage and to obtain a ratio of Reynolds' number to inner diameter, in millimeters, of the reaction chamber of between 25 and 50 to 1.
摘要翻译：通过气相TiCl4与氧在2.4和3.4巴之间的压力下反应制备二氧化钛的方法，使用相应的装置实现长的永久运行时间。所需的氧气间接预热至850℃至1000℃。在一端封闭的反应室中，内部配置有利流动并至少部分用耐火材料衬里，间接预热的氧气通过与非常热的直接接触进一步加热根据需要，辅助火焰的燃烧气体与引入到反应室下游的TiCl 4的自发反应的温度。通过直接在其前壁处的反应室的内周壁中的环形通道，间接预热的氧气进入均匀分布在其周围的室，并且控制氧气流以获得15000和20,000之间的雷诺数并且获得雷诺数与反应室的内径之比（以毫米计）在25和50比1之间。

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