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    Non-silking iron oxide yellow pigments with high color density
    3.
    发明授权
    Non-silking iron oxide yellow pigments with high color density 有权
    无色氧化铁黄色颜料，颜色密度高

    公开(公告)号：US6053972A

    公开(公告)日：2000-04-25

    申请号：US192632

    申请日：1998-11-16

    申请人： Ulrike Pitzer ,  Rolf Naumann ,  Rolf-Michael Braun

    发明人： Ulrike Pitzer ,  Rolf Naumann ,  Rolf-Michael Braun

    IPC分类号： C01G49/02 ,  C08K3/22 ,  C09C1/22 ,  C09C1/24 ,  C09D7/12

    CPC分类号： C09D7/1225 ,  C08K3/22 ,  C09C1/22 ,  C01P2006/60

    摘要： Non-silking iron oxide yellow pigments with high color density.Iron oxide yellow pigments in the .alpha.-FeOOH modification with a silking index of less than 5 were obtained in whicha) .alpha.-FeOOH seeds are produced by precipitation from an Fe(II)-containing solution with an alkaline precipitating agent in the presence of soluble aluminium salts in an amount of 3 to 9 wt. %. calculated as Al.sub.2 O.sub.3, with respect to precipitated .alpha.-FeOOH, and subsequent oxidation to .alpha.-FeOOH andb) pigment growth is performed by precipitating further iron with simultaneous oxidation, wherein the seed/time yield is less than 0.3 h.sup.-1 and the pH value is less than 3.9 over the entire period of pigment growth andc) pigment growth is terminated at a reproduction factor between 3 and 20.

    摘要翻译： 无色氧化铁黄色颜料，颜色密度高。 获得了具有小于5的丝绒指数的α-FeO​​OH改性中的氧化铁黄色颜料，其中a）通过在含碱性沉淀剂的Fe（II）溶液中沉淀，在存在 可溶性铝盐的用量为3〜9wt。 ％。 以Al 2 O 3计算，相对于析出的α-FeO​​OH，随后氧化成α-FeO​​OH，b）通过同时氧化沉淀进一步的铁进行颜料生长，其中种子/时间产率小于0.3h -1，pH 在颜料生长的整个周期中，值小于3.9，c）颜色生长在3和20之间的繁殖因子下终止。

    Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides
    6.
    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。