公开(公告)号：US09988282B2

公开(公告)日：2018-06-05

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： C01F7/02 ,  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.

公开(公告)号：US20140124451A1

公开(公告)日：2014-05-08

申请号：US14151368

申请日：2014-01-09

申请人： NALCO COMPANY

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

IPC分类号： C01F7/06

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。

公开(公告)号：US20050274926A1

公开(公告)日：2005-12-15

申请号：US11197236

申请日：2005-08-04

申请人： Donald Spitzer ,  Alan Rothenberg ,  Howard Heitner ,  Frank Kula

发明人： Donald Spitzer ,  Alan Rothenberg ,  Howard Heitner ,  Frank Kula

IPC分类号： C02F5/02 ,  C02F5/12

CPC分类号： C02F5/12 ,  C01F7/0606 ,  C01F7/0633 ,  C02F5/10 ,  C02F2103/023 ,  C02F2103/16 ,  C02F2103/28 ,  C08G73/0206 ,  C08G73/0213 ,  C23F14/02 ,  Y10S162/04

摘要： Materials and a method are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in an industrial process having an alkaline process stream such as a pulping mill process stream. When materials of the present invention are added to the alkaline process stream, they reduce and even completely prevent formation of aluminosilicate scale on equipment surfaces such as evaporator walls and heating surfaces. The present materials are effective at treatment concentrations that make them economically practical.

摘要翻译： 提供材料和方法，其中具有至少0.5摩尔％的侧基或末端基团含有-Si（OR“）3（其中R”为H，烷基，Na， K或NH 4）用于控制具有碱性工艺流的工业方法中的硅铝酸盐结垢，例如制浆机工艺流。 当将本发明的材料添加到碱性工艺流中时，它们减少甚至完全防止在诸如蒸发器壁和加热表面的设备表面上形成铝硅酸盐垢。 本材料在治疗浓度上有效，使其具有经济实用性。

公开(公告)号：US06555077B1

公开(公告)日：2003-04-29

申请号：US09763140

申请日：2001-02-20

申请人： Steven Philip Rosenberg ,  Wayne Tichbon ,  Steven James Healy

发明人： Steven Philip Rosenberg ,  Wayne Tichbon ,  Steven James Healy

IPC分类号： C01F746

CPC分类号： C01F7/0606 ,  C01F7/476

摘要： A process for the removal of organic impurities in a Bayer process liquor in which wet and dry oxidation processes are linked together in a complementary way, such that the weaknesses of each individual organic removal process become a strength of the combined process. An organics-rich liquor stream is fed to a wet oxidation process to produce a first processed liquor which is depleted in organic compounds, but enriched in sodium carbonate and/or sodium oxalate. A feed slurry is fed to the dry oxidation process, typically including a liquor burner, where sodium compounds react to produce a discharge product. The first processed liquor and discharge product are directed into a leach tank, resulting in the formation of precipitated products including sodium carbonate and/or sodium oxalate. The precipitated products are separated from the leach tank and recycled in a mix tank providing the feed slurry to the liquor burner.

摘要翻译： 一种在拜耳法溶液中去除有机杂质的方法，其中湿法和干法氧化法以互补的方式连接在一起，使得每个单独的有机物去除过程的弱点成为组合过程的强度。 将富有机物的液流进料到湿氧化过程中以产生贫化的有机化合物但富含碳酸钠和/或草酸钠的第一加工液体。 将进料浆料进料到干燥氧化过程中，通常包括液体燃烧器，其中钠化合物反应以产生排放产物。 将第一加工液和排出物导入浸出槽中，导致形成沉淀产物，包括碳酸钠和/或草酸钠。 沉淀的产物与浸出罐分离并在混合槽中再循环，提供进料浆料至液体燃烧器。

公开(公告)号：US5314626A

公开(公告)日：1994-05-24

申请号：US925222

申请日：1992-08-03

申请人： Peter A. Dimas

发明人： Peter A. Dimas

IPC分类号： C01F7/06 ,  C01F7/47 ,  C01F7/02

CPC分类号： C01F7/47 ,  C01F7/0606

摘要： Siliceous materials produced by thermally treating Bayer process liquors are obtained in modified form when produced in the presence of ammonium, aromatic amine, and amine compounds, or compounds bearing ammonium, aromatic amine or amine moieties, such as N-propylamine, pyridine and tetramethylammonium hydroxide. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.

摘要翻译： 在铵，芳香胺和胺化合物或含有铵，芳族胺或胺部分的化合物如N-丙胺，吡啶和四甲基氢氧化铵的存在下制备时，通过热处理拜耳法处理液制备的硅质材料是以改性形式获得的 。 这些改性的硅质材料具有赋予它们在整个过程中减少沉积在表面上的形态。

公开(公告)号：US5118484A

公开(公告)日：1992-06-02

申请号：US568989

申请日：1990-08-17

申请人： Kwat I. The ,  George D. Fulford

发明人： Kwat I. The ,  George D. Fulford

IPC分类号： C01F7/06 ,  C01F7/47

CPC分类号： C01F7/47 ,  C01F7/0606

摘要： A process is described for removing dissolved silica from process solutions or slurries formed in the Bayer process for producing alumina from bauxite. In the novel process, a Bayer process solution or slurry is contacted with porous agglomerates of a material containing Bayer process desilication product and bonded together by a polymer resin which is resistant to chemical degradation by high concentrations of caustic present in Bayer process liquors. The desilication product is essentially complex hydrated sodium aluminum silicates and typical bonding resins are polyvinylchloride or polypropylene.

摘要翻译： 描述了从用于从铝土矿生产氧化铝的拜耳法中形成的工艺溶液或浆料中除去溶解的二氧化硅的方法。 在新型方法中，拜耳法溶液或浆料与含有拜耳法脱除产物的材料的多孔附聚物接触，并通过聚合物树脂粘合在一起，该聚合物树脂通过高浓度的拜耳法处理液中存在的高浓度苛性碱而耐化学降解。 脱硅产物基本上是复合水合硅酸铝钠，典型的粘结树脂是聚氯乙烯或聚丙烯。

公开(公告)号：US2522605A

公开(公告)日：1950-09-19

申请号：US9306749

申请日：1949-05-13

申请人： KAISER ALUMINIUM CHEM CORP

发明人： CUNDIFF WINSTON H

IPC分类号： C01F7/06

CPC分类号： C01F7/0606

公开(公告)号：US20080179564A1

公开(公告)日：2008-07-31

申请号：US12061755

申请日：2008-04-03

申请人： Donald P. Spitzer ,  Alan S. Rothenberg ,  Howard I. Heitner ,  Frank Kula

发明人： Donald P. Spitzer ,  Alan S. Rothenberg ,  Howard I. Heitner ,  Frank Kula

IPC分类号： C02F5/10

CPC分类号： C02F5/12 ,  C01F7/0606 ,  C01F7/0633 ,  C02F5/10 ,  C02F2103/023 ,  C02F2103/16 ,  C02F2103/28 ,  C08G73/0206 ,  C08G73/0213 ,  C23F14/02 ,  Y10S162/04

摘要： Materials and a method are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in an industrial process having an alkaline process stream such as a pulping mill process stream. When materials of the present invention are added to the alkaline process stream, they reduce and even completely prevent formation of aluminosilicate scale on equipment surfaces such as evaporator walls and heating surfaces. The present materials are effective at treatment concentrations that make them economically practical.

摘要翻译： 提供材料和方法，其中使用具有至少0.5摩尔％的侧基或含-Si（OR“）3（其中R”为H，烷基，Na，K或NH 4）的端基的聚合物 在具有碱性工艺流的工业过程中控制硅铝酸盐结垢，例如制浆机工艺流。 当将本发明的材料添加到碱性工艺流中时，它们减少甚至完全防止在诸如蒸发器壁和加热表面的设备表面上形成铝硅酸盐垢。 本材料在治疗浓度上有效，使其具有经济实用性。

公开(公告)号：US20040146440A1

公开(公告)日：2004-07-29

申请号：US10351145

申请日：2003-01-27

发明人： Boleslaw (Les) Ignasiak

IPC分类号： C22B035/00

CPC分类号： C22B7/008 ,  B03B9/061 ,  C01D3/02 ,  C01F7/0606 ,  C22B21/0023 ,  Y02P10/234 ,  Y02W30/521

摘要： A method is provided for efficient processing of spent potliner, separating and recycling/utilizing the liquid and solid products generated during processing. The method includes the steps of crushing and screening the potliner freed from metal debris, pulverizing the potliner suspended in a hot aqueous slurry by autogenous grinding in a tumbler in the presence of air, subjecting the potliner to a series of leaching, thickening and filtering steps followed by separation of the potliner into Bayer Liquor, solid sodium fluoride, quality carbon product and mineral matter characterized by low cyanide and fluoride leachability. About 85% of the water required for potliner processing is recovered and recycled into the process.

公开(公告)号：US20030064019A1

公开(公告)日：2003-04-03

申请号：US10264455

申请日：2002-10-04

申请人： Curtain University of Technology

发明人： Dermot Michael O'Hare ,  Andrew Michael Fogg ,  Gordon Michael Parkinson

IPC分类号： C01F007/02

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

摘要： A process for producing alumina from bauxite is described in which bauxite is treated with an alkali to form a mixture comprising a solution of aluminum-containing ions and alumina trihydrate is precipitated from the solution. The process comprises treatment of the solution before or after the precipitation step with a layered double hydroxide in order to remove impurities from the solution by intercalation into the layers in the double hydroxide. The double hydroxide may contain layers of the formula: nullLiAl2(OH)6nullnull.

摘要翻译： 描述了从铝土矿生产氧化铝的方法，其中铝土矿用碱处理以形成包含含铝离子溶液和三水合氧化铝的混合物从溶液中沉淀出来。 该方法包括用层状双氢氧化物处理沉淀步骤之前或之后的溶液，以便通过嵌入双氢氧化物中的层中从溶液中除去杂质。 双氢氧化物可以含有下式的层：[LiAl 2（OH）6] +。