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49 条记录 (耗时 0.023 秒)

    Adsorbent combinations for enhanced removal of sodium oxalate from bayer process spent liquor
    31.
    发明授权
    Adsorbent combinations for enhanced removal of sodium oxalate from bayer process spent liquor 失效
    吸附剂组合，用于从拜耳法废液中去除草酸钠

    公开(公告)号：US5728180A

    公开(公告)日：1998-03-17

    申请号：US670360

    申请日：1996-06-25

    申请人： Fred S. Williams ,  Anthony J. Perrotta

    发明人： Fred S. Williams ,  Anthony J. Perrotta

    IPC分类号： C01F7/06 ,  C01F7/47 ,  C01F7/36 ,  C01F7/08

    CPC分类号： C01F7/0606 ,  C01F7/473

    摘要： Sodium oxalate is precipitated from spent Bayer process liquor by mixture with a low total alkalinity (TA) sodium oxalate seed solution that has been treated with two or more adsorbents to remove organic poisons from the sodium oxalate. The adsorbents are preferably two different adsorbents selected from activated carbon, ESP dust, calcium oxide and magnesium oxide. Surprisingly, combination treatments with activated carbon and ESP dust are most effective even though ESP dust alone has little effect on oxalate removal.

    摘要翻译： 通过与已经用两种或更多种吸附剂处理的低总碱度（TA）草酸钠种子溶液的混合物从废拜耳处理液中沉淀草酸钠，以从草酸钠中除去有毒的毒物。 吸附剂优选为选自活性炭，ESP粉尘，氧化钙和氧化镁的两种不同的吸附剂。 令人惊讶的是，尽管ESP粉尘对草酸盐的去除几乎没有影响，但活性炭和ESP粉尘的组合处理最为有效。

    Recovery of aluminum from spent liquor
    32.
    发明授权
    Recovery of aluminum from spent liquor 失效
    从废液中回收铝

    公开(公告)号：US4581207A

    公开(公告)日：1986-04-08

    申请号：US637743

    申请日：1984-08-06

    申请人： J. Finley Bush ,  Paul J. The

    发明人： J. Finley Bush ,  Paul J. The

    IPC分类号： C01F7/06 ,  C01F7/14 ,  C01F7/47 ,  C01D1/34

    CPC分类号： C01F7/47 ,  C01F7/0606 ,  C01F7/144 ,  C01F7/473

    摘要： A process for the purification of spent liquor from an alumina precipitation stage is disclosed wherein the spent liquor is first contacted with 50 volume % or less ethanol to form a sodium oxalate precipitate and the, after removal of the sodium oxalate precipitate is contacted with over 50 volume % of ethanol extraction fluid to separate the mixture into a first layer comprising the ethanol and at least a portion of the caustic from the spent liquor and a second layer which comprises the remainder of the spent liquor. The spent liquor may then be subjected to a further precipitation to recover further alumina. The spent liquor remaining may be further treated in subsequent extraction steps to concentrate and dispose of undesirable impurities remaining.

    摘要翻译： 公开了一种用于从氧化铝沉淀阶段纯化废液的方法，其中废液首先与50体积％或更少的乙醇接触以形成草酸钠沉淀物，并且在除去草酸钠沉淀物后，与超过50 体积％的乙醇提取流体，以将混合物分离成包含乙醇的第一层和来自废液的至少一部分苛性碱，以及包含剩余的废液的第二层。 然后可以将废液进一步沉淀以再回收氧化铝。 剩余的废液可以在随后的萃取步骤中进一步处理以浓缩和处理剩余的不需要的杂质。

    Surfactant Based Small Molecules for Reducing Aluminosilicate Scale in the Bayer Process
    34.
    发明申请
    Surfactant Based Small Molecules for Reducing Aluminosilicate Scale in the Bayer Process 有权
    用于在拜耳法中还原铝硅酸盐垢的基于表面活性剂的小分子

    公开(公告)号：US20170066656A1

    公开(公告)日：2017-03-09

    申请号：US15237841

    申请日：2016-08-16

    申请人： Nalco Company

    发明人： Carl Nicholas Urbani ,  Timothy La ,  John David Kildea

    IPC分类号： C01F7/06 ,  C23F14/02

    CPC分类号： C01F7/0633 ,  C01F7/0606 ,  C23F14/02

    摘要： The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more GPS-surfactant 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： 本发明提供了用于抑制拜耳工艺设备的液液中DSP垢积累的方法和组合物。 该方法包括将一种或多种基于GPS-表面活性剂的小分子添加到液体流体回路中。 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。

    REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS
    35.
    发明申请
    REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS 有权
    减少贝氏过程中的铝酸盐垢

    公开(公告)号：US20120148462A1

    公开(公告)日：2012-06-14

    申请号：US13403282

    申请日：2012-02-23

    申请人： Everett C. Phillips ,  Timothy La ,  Kailas B. Sawant

    发明人： Everett C. Phillips ,  Timothy La ,  Kailas B. Sawant

    IPC分类号： C01F7/02

    CPC分类号： C01F7/0633 ,  C01F7/0606 ,  C01F7/46 ,  C01F7/47 ,  C02F5/12 ,  C02F2103/16 ,  C07F7/025

    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。

    NOVEL APPROACH IN CONTROLLING DSP SCALE IN BAYER PROCESS
    38.
    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。

    Alumina recovery using aluminum containing layered double hydroxide
    39.
    发明授权
    Alumina recovery using aluminum containing layered double hydroxide 失效
    使用含铝层状双氢氧化铝的氧化铝回收

    公开(公告)号：US07666373B2

    公开(公告)日：2010-02-23

    申请号：US11835750

    申请日：2007-08-08

    申请人： Steven Philip Rosenberg

    发明人： Steven Philip Rosenberg

    IPC分类号： C01F7/00

    CPC分类号： C01F7/0646 ,  C01F7/004 ,  C01F7/005 ,  C01F7/0606 ,  C01P2002/22

    摘要： A process for recovering alumina values from a first liquor having an initial concentration of aluminate ions and hydroxyl ions in solution is described. The first liquor is treated with a hydroxide of a metal other than aluminium to form an aluminium-bearing layered double hydroxide and produce a treated stream of first liquor, the treated stream of first liquor having a final concentration of aluminate ions less than the initial concentration of aluminate ions. The aluminium-bearing layered double hydroxide is separated from the treated stream of first liquor. Thereafter the clarified treated stream of first liquor is returned to a first location within an alumina refinery. The separated aluminium-bearing layered double hydroxide is contacted with a solution containing carbonate ions to form a slurry comprising an insoluble salt of the metal other than aluminium and a second liquor comprising aluminate ions released from the aluminium-bearing layered double hydroxide.

    摘要翻译： 描述了从溶液中具有初始浓度的铝酸盐离子和羟基离子的第一液体中回收氧化铝值的方法。 第一液体用除了铝之外的金属的氢氧化物处理以形成含铝的层状双氢氧化物并产生经处理的第一液体流，所处理的第一液体流的铝酸盐离子的终浓度小于初始浓度 的铝酸盐离子。 将含铝层状双氢氧化物与经处理的第一液流分离。 此后，澄清处理的第一液体物流返回到氧化铝精炼厂内的第一位置。 将分离的含铝层状双氢氧化物与含有碳酸根离子的溶液接触以形成包含除铝以外的金属的不溶性盐的浆料和包含从含铝层状双氢氧化物释放的铝酸根离子的第二液体。