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    Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides
    2.
    发明授权
    Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides 失效
    用于生产用于除去氮氧化物的催化剂的混合氧化物粉末的方法

    公开(公告)号：US5723404A

    公开(公告)日：1998-03-03

    申请号：US649924

    申请日：1996-05-16

    申请人： Kai Butje ,  Jurgen Kischkewitz ,  Rolf Michael Braun ,  Udo Holtmann ,  Peter-Joachim Barenthien

    发明人： Kai Butje ,  Jurgen Kischkewitz ,  Rolf Michael Braun ,  Udo Holtmann ,  Peter-Joachim Barenthien

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J21/06 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30 ,  B01J37/02 ,  B01J101/50

    CPC分类号： B01J21/063 ,  B01D53/8628 ,  B01J37/0236

    摘要： A process for the production of a mixed oxide powder, that contains as chief constituent TiO.sub.2 in the form of anatase and as minor constituents at least one of the catalytically active oxides MoO.sub.3, WO.sub.3 and V.sub.2 O.sub.5, suitable for use as a catalyst for the removal of nitrogen oxides, comprising (a) partially neutralizing a titanium dioxide hydrate suspension containing sulphuric acid with an alkaline liquor to a pH value between about 4.0 and 6.0 at temperatures between about 20.degree. and 100.degree. C., (b) filtering the suspension from (a) to produce a filter cake and intensively washing the filter cake, (c) adding to the filter cake from (b) at least one water-soluble salt of at least one of the metals Mo, W and V in solid or dissolved form, and (d) drying the filter cake from (c) and calcining it at a temperature between about 300.degree. and 750.degree. C.

    摘要翻译： 一种混合氧化物粉末的制造方法，其包含主要成分为锐钛矿形式的TiO 2和作为少量成分的至少一种催化活性氧化物MoO 3，WO 3和V 2 O 5的方法，适合用作除去 氮氧化物，其包含（a）在约20℃至100℃的温度下，将含有碱性液的硫酸的二氧化钛水合物悬浮液部分中和至约4.0至6.0之间的pH值，（b）将（ a）生产滤饼并强烈地洗涤滤饼，（c）从（b）至少一种金属Mo，W和V的至少一种水溶性盐固体或溶解形式的滤饼中加入滤饼 ，（d）将（c）的滤饼干燥，并在约300〜750℃的温度下煅烧。

    Process for the preparation of very pure titanium dioxide
    6.
    发明授权
    Process for the preparation of very pure titanium dioxide 失效
    制备非常纯的二氧化钛的方法

    公开(公告)号：US5468463A

    公开(公告)日：1995-11-21

    申请号：US282387

    申请日：1994-07-29

    申请人： Kai Butje ,  Jurgen Kischkewitz

    发明人： Kai Butje ,  Jurgen Kischkewitz

    IPC分类号： C01G23/053 ,  C01G23/04 ,  C01G23/02

    CPC分类号： C01G23/0532 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/80

    摘要： A process for the preparation of very pure titanium dioxide by reacting titanium tetrahalides with sulphuric acid, hydrolysis the titanyl sulphate solution obtained and calcining the hydrolysate is disclosed wherein the reaction between titanium tetrahalide and aqueous 20-40% by weight strength sulphuric acid is performed in such a way that crystallisation of titanyl sulphate does not take place, the hydrogen halide is separated, the solution is optionally concentrated and filtered and then the ratio by weight of sulphuric acid to titanium dioxide is adjusted to between 1.7 and 2.0 and the titanium dioxide concentration is adjusted to between 250 and 300 g/l, the solution is hydrolyzed and the resulting titanium oxide hydrate is filtered off and calcined to give Futile or anatase.

    摘要翻译： 公开了通过使四卤化钛与硫酸反应制备非常纯的二氧化钛的方法，水解得到的硫酸氧钛溶液并煅烧水解产物，其中四卤化钛与20-40重量％的强度硫酸水溶液之间的反应在 这样一种不会发生硫酸氧钛的结晶的方式，分离卤化氢，任选地将溶液浓缩并过滤，然后将硫酸与二氧化钛的重量比调节至1.7-2.0，二氧化钛浓度 调节至250至300g / l，将溶液水解，并将得到的氧化钛水合物过滤并煅烧，得到无定形或锐钛矿。