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11 条记录 (耗时 0.014 秒)

    Reducing aluminosilicate scale in the Bayer process
    2.
    发明授权
    Reducing aluminosilicate scale in the Bayer process 有权
    在拜耳工艺中减少铝硅酸盐垢

    公开(公告)号：US08545776B2

    公开(公告)日：2013-10-01

    申请号：US12567116

    申请日：2009-09-25

    申请人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H. Slinkman

    发明人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H. Slinkman

    IPC分类号： C01F7/04 ,  C01F1/00 ,  C02F1/52 ,  C02F5/08 ,  B01D21/01

    CPC分类号： C02F5/105 ,  C01F7/47 ,  C22B21/0015

    摘要： The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.

    摘要翻译： 本发明提供了一种抑制拜耳工艺设备液液中DSP垢积累的方法。 该方法包括将一种或多种特定的硅烷基小分子加入到液体流体回路中。 这些阻垢剂可减少DSP垢的形成，从而增加流体的通量，增加拜耳工艺设备可以运行的时间，并减少对拜耳工艺设备昂贵且危险的酸洗液的需求。 结果，本发明大大降低了操作拜耳工艺的总成本。

    Composition and method for improved aluminum hydroxide production
    4.
    发明授权
    Composition and method for improved aluminum hydroxide production 有权
    改善氢氧化铝生产的组成和方法

    公开(公告)号：US07976820B2

    公开(公告)日：2011-07-12

    申请号：US11434490

    申请日：2006-05-15

    申请人： Jianjun Liu ,  James A Counter ,  Dmitri L Kouznetsov ,  David H Slinkman

    发明人： Jianjun Liu ,  James A Counter ,  Dmitri L Kouznetsov ,  David H Slinkman

    IPC分类号： C01F7/34

    CPC分类号： C01F7/145

    摘要： An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 μm which may be readily screened out with minimum trihydrate loss.

    摘要翻译： 用于在拜耳法怀孕液中生产氢氧化铝晶体的改进方法和组合物涉及添加包含C8-C10脂肪酸的乳化结晶改性剂，其前体，盐或其共混物。 脂肪酸结晶改性剂的烷基链没有官能团。 在存在和不存在溶解脂肪酸的烃油的情况下，改性剂产生商业上可行的产物。 此外，以乳化形式或作为脂肪酸整齐地制备的改性剂有助于形成大于200μm的草酸盐聚集体，其可以以最小的三水合物损失容易地筛选出来。

    NOVEL APPROACH IN CONTROLLING DSP SCALE IN BAYER PROCESS
    5.
    发明申请
    NOVEL APPROACH IN CONTROLLING DSP SCALE IN BAYER PROCESS 有权
    在贝叶斯过程中控制DSP规模的新方法

    公开(公告)号：US20100254866A1

    公开(公告)日：2010-10-07

    申请号：US12418988

    申请日：2009-04-06

    申请人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H. Slinkman ,  Kim Richard Coleman

    发明人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H. Slinkman ,  Kim Richard Coleman

    IPC分类号： C01F7/20

    CPC分类号： C01F7/0606 ,  C01F7/47

    摘要： The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.

    摘要翻译： 本发明提供了一种在拜耳法的液体回路中控制二氧化硅的方法。 该方法包括添加助催化剂材料以增强DSP的沉淀，并且包括向需要沉淀DSP并从溶液中除去二氧化硅的电路部分添加一种或多种二氧化硅分散体材料或干燥二氧化硅形式; 例如拜耳加工厂的脱硅阶段。 从溶液中除去DSP会降低液体中的二氧化硅浓度，从而可以更好地控制工艺问题，例如氧化铝产品中的二氧化硅污染和在过程中的后期阶段的DSP形成，其中沉淀作用在容器壁和设备上的沉淀是有问题的。 结果，本发明大大降低了操作拜耳工艺的总成本。

    Method for improved aluminum hydroxide production
    7.
    发明授权
    Method for improved aluminum hydroxide production 有权
    改进氢氧化铝生产方法

    公开(公告)号：US07771681B2

    公开(公告)日：2010-08-10

    申请号：US11618451

    申请日：2006-12-29

    申请人： Dmitri L. Kouznetsov ,  Jianjun Liu ,  David H. Slinkman

    发明人： Dmitri L. Kouznetsov ,  Jianjun Liu ,  David H. Slinkman

    IPC分类号： C02F1/00

    CPC分类号： C01F7/145 ,  C01P2004/61

    摘要： The present invention relates ways to increase the output of a high quality product from the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated aluminum hydroxide while not reducing the total production amounts. The invention relates to the use of a crystal growth modifier compositions added to the precipitation liquor to increase the particle size distribution of the precipitated alumina trihydrate.

    摘要翻译： 本发明涉及从氢氧化铝回收方法如拜耳法提高高质量产品的输出的方法。 本发明是增加沉淀氢氧化铝的尺寸而不降低总产量的方法。 本发明涉及添加到沉淀液中的晶体生长改性剂组合物用于增加沉淀的三水合氧化铝的粒度分布的用途。

    Approach in controlling DSP scale in bayer process
    8.
    发明授权
    Approach in controlling DSP scale in bayer process 有权
    拜耳过程控制DSP规模的方法

    公开(公告)号：US08029752B2

    公开(公告)日：2011-10-04

    申请号：US12418988

    申请日：2009-04-06

    申请人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H Slinkman ,  Kim Richard Coleman

    发明人： Timothy La ,  Ji Cui ,  John D. Kildea ,  David H Slinkman ,  Kim Richard Coleman

    IPC分类号： C01B33/26

    CPC分类号： C01F7/0606 ,  C01F7/47

    摘要： The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.

    摘要翻译： 本发明提供了一种在拜耳法的液体回路中控制二氧化硅的方法。 该方法包括添加助催化剂材料以增强DSP的沉淀，并且包括向需要沉淀DSP并从溶液中除去二氧化硅的电路部分添加一种或多种二氧化硅分散体材料或干燥二氧化硅形式; 例如拜耳加工厂的脱硅阶段。 从溶液中除去DSP会降低液体中的二氧化硅浓度，从而可以更好地控制工艺问题，例如氧化铝产品中的二氧化硅污染和在过程中的后期阶段的DSP形成，其中沉淀作用在容器壁和设备上的沉淀是有问题的。 结果，本发明大大降低了操作拜耳工艺的总成本。