Process for producing titanium dioxide
    1.
    发明授权
    Process for producing titanium dioxide 有权
    二氧化钛生产工艺

    公开(公告)号:US07476378B2

    公开(公告)日:2009-01-13

    申请号:US11260058

    申请日:2005-10-27

    CPC classification number: C01G23/07 C01G23/075 C01P2004/61 C09C1/3607

    Abstract: This disclosure relates to a process for producing titanium dioxide, comprising: a) providing a quantity of liquid titanium tetrahalide for reacting with an oxygen-containing gas; b) vaporizing a first portion of the liquid titanium tetrahalide and reacting the titanium tetrahalide vapor and the oxygen-containing gas, in a first stage of a reaction zone, the reaction zone temperature ranging from at least about 650° C.—to form a reaction product at least containing titanium dioxide and oxygen-containing gas and passing the reaction product, more typically in the vapor phase, to at least one additional stage of the reaction zone; and c) charging at least one additional portion of the liquid titanium tetrahalide to the at least one additional stage of the reaction zone to cool the titanium dioxide and to react with the oxygen-containing gas to form additional titanium dioxide. This process results in a high conversion to titanium dioxide and formation of titanium dioxide powders having improved particle size and size distribution.

    Abstract translation: 本公开涉及一种生产二氧化钛的方法,包括:a)提供一定数量的四卤化钛用于与含氧气体反应; b)蒸发液态四卤化钛的第一部分并使四卤化钛蒸气和含氧气体在反应区的第一阶段中反应,反应区温度为至少约650℃,以形成 反应产物至少含有二氧化钛和含氧气体,并将反应产物(通常在气相中)通到反应区的至少一个附加阶段; 和c)将至少另外一部分液体四卤化钛装入至该反应区的至少一个附加阶段以冷却二氧化钛并与含氧气体反应以形成另外的二氧化钛。 该方法导致二氧化钛的高转化率和具有改进的粒度和尺寸分布的二氧化钛粉末的形成。

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