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86 条记录 (耗时 0.02 秒)

    Process for removing aluminum species from alkali metal halide brine solutions
    74.
    发明授权
    Process for removing aluminum species from alkali metal halide brine solutions 有权
    从碱金属卤化物盐水溶液中除去铝物质的方法

    公开(公告)号：US06746592B1

    公开(公告)日：2004-06-08

    申请号：US09361626

    申请日：1999-07-27

    申请人： Felix Mok ,  R. Ganapathy Subramanian

    发明人： Felix Mok ,  R. Ganapathy Subramanian

    IPC分类号： C25B116

    CPC分类号： C01F7/00 ,  C01D3/16 ,  C25B1/34 ,  C25B15/08

    摘要： A method for the reduction of soluble aluminum species in an evaporated salt alkali metal halide brine containing up to 500 ppb aluminum species to provide a brine feedstock suitable for use in a chlor-alkali membrane cell process, said method comprising treating said brine with a magnesium salt in an amount to provide a Mg to Al molar ratio selected from 5-20 to 1 at a Mg concentration selected from 0.5-10 ppm, and sufficient alkali metal hydroxide to provide an excess alkalinity concentration of between 0.1-0.5 g/L alkali metal hydroxide to effect precipitation of a magnesium aluminum hydroxide complex; and removing said complex to provide said brine feedstock.

    摘要翻译： 一种减少含有多达500ppb铝物质的蒸发盐碱金属卤化物卤水中的可溶性铝物质的方法，以提供适用于氯 - 碱膜细胞工艺的盐水原料，所述方法包括用镁处理所述盐水 盐，其量为提供选自5-20:1的Mg至Al摩尔比，选自0.5-10ppm的Mg浓度，以及足够的碱金属氢氧化物，以提供0.1-0.5g / L碱的过量碱度浓度 金属氢氧化物以使氢氧化镁铝复合物沉淀; 并除去所述复合物以提供所述盐水原料。

    Process for producing an anionic clay-containing composition
    77.
    发明授权
    Process for producing an anionic clay-containing composition 有权
    用于制备含阴离子粘土的组合物的方法

    公开(公告)号：US06171991B2

    公开(公告)日：2001-01-09

    申请号：US09246690

    申请日：1999-02-09

    申请人： Dennis Stamires ,  Michael F. Brady ,  William Jones ,  Fathi Kooli

    发明人： Dennis Stamires ,  Michael F. Brady ,  William Jones ,  Fathi Kooli

    IPC分类号： C04B3400

    CPC分类号： B01J21/16 ,  B01J23/007 ,  C01F7/00 ,  C01F7/005 ,  C01F7/162 ,  C01P2002/22 ,  C01P2002/54 ,  C01P2002/72 ,  C01P2004/32

    摘要： This patent describes an economical and environment-friendly continuous process for the synthesis of anionic clay-containing compositions. It involves reacting a slurry comprising aluminium trihydrate and/or its calcined form, with a magnesium source. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. The product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents, and other commodity products.

    摘要翻译： 该专利描述了用于合成含阴离子粘土的组合物的经济和环境友好的连续方法。 它包括将包含三水合铝和/或其煅烧形式的浆料与镁源反应。 没有必要洗涤或过滤产品。 它可以直接喷雾干燥以形成微球体，或者可以挤出形成成型体。 该产品可以与催化剂，吸收剂，药物，化妆品，洗涤剂和其他商品的制造中的其他成分组合。

    Hydroxymethyl diphosphonated polyacrylates for red mud treatment
    78.
    发明授权
    Hydroxymethyl diphosphonated polyacrylates for red mud treatment 失效
    羟基甲基二膦酸聚丙烯酸酯用于红泥处理

    公开(公告)号：US5711923A

    公开(公告)日：1998-01-27

    申请号：US675135

    申请日：1996-07-03

    申请人： Paul J. Harris ,  Robert P. Mahoney ,  Manian Ramesh

    发明人： Paul J. Harris ,  Robert P. Mahoney ,  Manian Ramesh

    IPC分类号： B01D21/00 ,  C01F7/00

    CPC分类号： B01D21/00 ,  C01F7/00

    摘要： The invention comprises a process for improved flocculation of Bayer process red mud-containing slurry. The improvement comprises adding to the red mud-containing liquor a hydroxymethyl diphosphonic acid polymer optionally in addition to the conventional flocculant. The polymer is added to the red mud-containing liquor in an amount sufficient to reduce the concentration of suspended solids in the supernatant phase and/or increase the rate of sedimentation.

    摘要翻译： 本发明包括一种改进拜耳法红泥浆的絮凝的方法。 该改进包括向含红泥的液体中加入任选地除了常规絮凝剂之外的羟甲基二膦酸聚合物。 将聚合物以足以降低上清液相中悬浮固体浓度和/或提高沉降速率的量加入含红泥的液体中。

    Zirconium-doped pseudobehmite, process for its production and use thereof
    80.
    发明授权
    Zirconium-doped pseudobehmite, process for its production and use thereof 失效
    锆掺杂的假木质石，其生产和使用的方法

    公开(公告)号：US5032378A

    公开(公告)日：1991-07-16

    申请号：US296965

    申请日：1989-01-13

    申请人： Anh T. Liu ,  Rudolf Schwarz ,  Peter Kleinschmit

    发明人： Anh T. Liu ,  Rudolf Schwarz ,  Peter Kleinschmit

    IPC分类号： B01J21/06 ,  B01J35/10 ,  B01J37/00 ,  C01F7/00 ,  C01F7/34 ,  C01G25/00

    CPC分类号： B01J21/066 ,  B01J37/0045 ,  C01F7/00 ,  C01F7/34 ,  C01G25/00 ,  B01J35/1019 ,  B01J35/1038 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2006/12

    摘要： Zirconium-doped pseudoboehmite with the following properties: zirconium content of 0.5 to 10 mol % relative to Al water content of 20 to 35 weight percent total of the anionic impurities less than 0.5 weight percent. It is synthesized by a process wherein zirconium salt is added in calculated quantity to an aqueous aluminum sulfate solution, the resulting mixture is fed simultaneously with a sodium aluminate liquor into a water pool having a temperature of 50.degree. to 100.degree. C., thereby precipitating zirconium-doped alumina gel while a pH of 3.5 to 8 is maintained, the pH of the suspension is adjusted after addition of the aluminum sulfate solution to 8.5 to 10.5 by further addition of sodium aluminate liquor, the suspension is digested if necessary at the pH of 8.5 to 10.5 and the temperature of 50.degree. to 100.degree. C. for a period of up to 24 hours, the formed pseudoboehmite crystals are filtered off, the filter cake is redispersed with water and the suspension is sprayed-dried. By calcining at 700.degree. to 1100.degree. C., preferably at 850.degree. to 950.degree. C., the pseudoboehmite is further processed to zirconium-doped gamma-alumina suitable for automobile exhaust catalysts.

    摘要翻译： 锆掺杂的假勃姆石具有以下性质：锆含量相对于Al含水量为0.5〜10摩尔％，含水量为20〜35重量％，阴离子杂质总量小于0.5重量％。 通过其中锆盐以计算量加入到硫酸铝水溶液中的方法合成，将所得混合物与铝酸钠液体同时加入到温度为50-100℃的水池中，由此沉淀 锆掺杂的氧化铝凝胶，同时保持3.5至8的pH，通过进一步加入铝酸钠溶液将硫酸铝溶液加入到8.5至10.5之后调节悬浮液的pH，如果需要，将悬浮液在pH 为8.5〜10.5，温度为50〜100℃，长达24小时，滤出形成的假勃姆石晶体，将滤饼再用水分散，将悬浮液喷雾干燥。 通过在700〜1100℃，优选在850〜950℃下煅烧，将其进一步处理适合于汽车尾气催化剂的锆掺杂γ-氧化铝的假勃姆石。