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1. 发明授权

US09102995B2 Cross-linked ethylsulfonated dihydroxypropyl cellulose 有权
标题翻译：交联的乙基磺化二羟丙基纤维素
公开(公告)号：US09102995B2
公开(公告)日：2015-08-11
申请号：US13798761
申请日：2013-03-13
申请人： Nalco Company
发明人： Heinrich E. Bode , John D. Kildea , Jing Wang
IPC分类号： C01F7/02 , C22B21/00 , C01F7/06 , C01F7/14 , C01F7/47
CPC分类号： C22B21/0015 , C01F7/0653 , C01F7/145 , C01F7/148 , C01F7/473
摘要： The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more cross-linked ethylsulfonated polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides include cross-linked dextran or cross-linked dihydroxypropyl cellulose. The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.
摘要翻译：本发明提供了改善水合氧化铝生产的方法和组合物。本发明涉及在生产过程的流体回路中向液体或浆料中加入一种或多种交联的乙基磺化多糖。一种或多种多糖包括交联的葡聚糖或交联的二羟丙基纤维素。各种多糖可以赋予许多优点，包括以下至少一些：更大的絮凝效果，增加最大有效剂量，更快的沉降速率。生产过程可以是拜耳过程。

2. 发明申请

US20090087360A1 Removal of sodium oxalate from a bayer liquor 审中-公开
标题翻译：从拜耳液中除去草酸钠
公开(公告)号：US20090087360A1
公开(公告)日：2009-04-02
申请号：US10591795
申请日：2005-03-03
申请人： Linda Jane McCausland , Martin Fennell
发明人： Linda Jane McCausland , Martin Fennell
IPC分类号： C01F7/02 , B01J8/00
CPC分类号： C01F7/473 , B01D9/0013 , B01D9/0018 , B01D9/005 , B01D9/0059
摘要： The Bayer process uses hot sodium hydroxide solution to obtain pure alumina from bauxite ore. Alumina dissolves, and is then precipitated, and the remaining caustic Bayer liquor can be recycled for use again. However sodium oxalate tends to build up in the recycled liquor, and causes problems. By removing a stream of the liquor, treating it so as to be supersaturated with sodium oxalate, and then subjecting it to ultrasonic irradiation, crystal nuclei are formed. The resultant crystals can then be separated from the liquor. Surprisingly, other organic compounds in solution do not prevent this crystallisation process from being effective.
摘要翻译：拜耳法利用热氢氧化钠溶液从铝土矿矿石中获得纯氧化铝。氧化铝溶解，然后沉淀，剩余的苛性拜耳液可再循环使用。然而，草酸盐倾向于在回收液中积累，并引起问题。通过除去液体流，将其处理以用草酸钠过饱和，然后对其进行超声波照射，形成晶核。然后可以将所得晶体与液体分离。令人惊讶的是，溶液中的其他有机化合物不能阻止这种结晶过程的有效性。

3. 发明申请

US20070039885A1 Membranes and methods useful for caustic applications 有权
标题翻译：用于腐蚀应用的膜和方法
公开(公告)号：US20070039885A1
公开(公告)日：2007-02-22
申请号：US11495810
申请日：2006-07-28
申请人： Christopher Kurth , Isaac Iverson , Philip Rolchigo , Steven Kloos , Leonard Hodgins
发明人： Christopher Kurth , Isaac Iverson , Philip Rolchigo , Steven Kloos , Leonard Hodgins
IPC分类号： B01D61/00
CPC分类号： C08G69/46 , B01D61/025 , B01D61/027 , B01D67/0093 , B01D71/56 , B01D71/66 , C01F7/473 , C23F1/46
摘要： The invention provides methods for purifying caustic feed streams using membranes that comprise polysulfonamide matrices.
摘要翻译：本发明提供了使用包含聚磺酰胺基质的膜来净化苛性进料流的方法。

4. 发明申请

US20040170546A1 Process for the removal of oxalate and/or sulphate from Bayer liquors 失效
标题翻译：从拜耳液中除去草酸盐和/或硫酸盐的方法
公开(公告)号：US20040170546A1
公开(公告)日：2004-09-02
申请号：US10798333
申请日：2004-03-12
发明人： Steven P. Rosenberg , Wayne Tichbon , Darrel J. Wilson , Catherine A. Heath
IPC分类号： C01F007/38
CPC分类号： C01F7/47 , C01F7/473
摘要： A process for the removal and causticisation of sodium oxalate and/or sodium sulphate from a Bayer process liquor containing sodium carbonate and one or both of sodium oxalate and sodium sulphate in an alumina refinery is described. The process is based on the observation that to efficiently causticise sodium oxalate solutions, it is first necessary to remove the aluminate ion from solution, optionally with recovery of the aluminate ion in some later step. This is effeeted by removing aluminate ions from the Bayer liquor through the formation of a carbonate bearing hydrocalumite and/or sulpha-bearing hydrocalumite. The liquor may then be treated with sufficient lime to remove and causticise any residual carbonate ions and some or all of the oxalate ions present so that any reacted lime solids thus formed can be separated and safely disposed of. The process may include a pre-causticisation step in which the Bayer liquor is first causticised to reduce the concentration of carbonate ions, prior to the step of removing aluminate ions. The invention provides an effective process for the removal of sodium sulphate and a practical method for the recovery of soda from sodium sulphate. The efficiency of lime utilisation can also be dramatically increased from about 20% to 80% (if sulphate removal is not the objective) wherein alumina losses can be minimised. The oxalate concentration of the process liquor is also substantially lower than can usually be achieved in processes based on sodium oxalate-crystallisation.
摘要翻译：描述了在氧化铝精炼厂中从含有碳酸钠和一种或两种草酸钠和硫酸钠的拜耳法处理液中去除和苛化草酸钠和/或硫酸钠的方法。该方法基于以下观察：为了有效地苛化草酸钠溶液，首先需要从溶液中除去铝酸根离子，任选地在稍后的步骤中回收铝酸根离子。这是通过从形成含碳酸钙的水煤钙矿和/或含水硅钙土的拜耳液中除去铝酸盐离子来实现的。然后可以用足够的石灰处理液体以除去和苛化任何残留的碳酸根离子和存在的一些或全部草酸根离子，使得由此形成的任何反应的石灰固体可被分离并安全地处理。该方法可以包括预苛化步骤，其中在去除铝酸根离子的步骤之前，首先将拜耳液体苛化以降低碳酸根离子的浓度。本发明提供了一种去除硫酸钠的有效方法和从硫酸钠中回收苏打的实用方法。石灰利用的效率也可以从约20％显着增加到80％（如果硫酸盐去除不是目标），其中氧化铝损失可以最小化。处理液的草酸盐浓度也显着低于通常在基于草酸钠结晶的方法中实现的草酸盐浓度。

5. 发明申请

US20040131521A1 Removable of non-water soluble substances from solutions of aqueous metal extracts 审中-公开
标题翻译：从含水金属提取物的溶液中除去非水溶性物质
公开(公告)号：US20040131521A1
公开(公告)日：2004-07-08
申请号：US10475264
申请日：2003-10-20
发明人： Detlef Kuboth
IPC分类号： C01G001/00
CPC分类号： C22B3/0097 , C01F7/0653 , C01F7/47 , C01F7/473 , Y02P10/234 , Y10S210/908
摘要： The invention relates to methods and a device for the removal of non-water soluble substances from solutions of aqueous metal extracts, by addition of at least one water-soluble cationic polyelectrolyte, containing a diallylaminoalkyl(meth)acrylamide, neutralised or quaternised with mineral acid and subsequently polymerised, preferably dimethylaminopropylacrylamide.
摘要翻译：本发明涉及通过加入至少一种水溶性阳离子聚电解质来除去非水溶性物质的方法和装置，所述水溶性阳离子聚电解质含有用无机酸中和或季铵化的（甲基）丙烯酰胺二烯丙基氨基烷基酯随后聚合，优选二甲基氨基丙基丙烯酰胺。

6. 发明授权

US06743403B1 Process for the removal of oxalate and/or sulphate from Bayer liquors 失效
标题翻译：从拜耳液中除去草酸盐和/或硫酸盐的方法
公开(公告)号：US06743403B1
公开(公告)日：2004-06-01
申请号：US09936781
申请日：2001-09-18
申请人： Steven P. Rosenberg , Wayne Tichbon , Darrel J. Wilson , Catherine A. Heath
发明人： Steven P. Rosenberg , Wayne Tichbon , Darrel J. Wilson , Catherine A. Heath
IPC分类号： C01F702
CPC分类号： C01F7/47 , C01F7/473
摘要： A process for the removal and causticisation of sodium oxalate and/or sodium sulphate from a Bayer process liquor containing sodium carbonate and one or both of sodium oxalate and sodium sulphate in an alumina refinery is described. The process is based on the observation that to efficiently causticise sodium oxalate solutions, it is first necessary to remove the aluminate ion from solution, optionally with recovery of the aluminate ion in some later step. This is effected by removing aluminate ions from the Bayer liquor through the formation of a carbonate-bearing hydrocalumite and/or sulphate-hearing hydrocalumite. The liquor may then be treated with sufficient lime to remove and causticise any residual carbonate ions and some or all of the oxalate ions present so that any reacted lime solids thus formed can be separated and safely disposed of. The process may include a pre-causticisation step in which the Bayer liquor is first causticised to reduce the concentration of carbonate ions, prior to the step of removing aluminate ions. The invention provides an effective process for the removal of sodium sulphate and a practical method for the recovery of soda from sodium sulphate. The efficiency of lime utilisation can also be dramatically increased from about 20% to 50% (if sulphate removal is not the objective) wherein alumina losses can be minimised. The oxalate concentration of the process liquor is also substantially lower than can usually be achieved in processes based on sodium oxalate-crystallisation.
摘要翻译：描述了在氧化铝精炼厂中从含有碳酸钠和一种或两种草酸钠和硫酸钠的拜耳法处理液中去除和苛化草酸钠和/或硫酸钠的方法。该方法基于以下观察：为了有效地苛化草酸钠溶液，首先需要从溶液中除去铝酸根离子，任选地在稍后的步骤中回收铝酸根离子。这是通过形成含碳酸酯的水煤钙矿和/或硫酸盐 - 听力水泥钙矿来从拜耳液中除去铝酸盐离子来实现的。然后可以用足够的石灰处理液体以除去和苛化任何残留的碳酸根离子和存在的一些或全部草酸根离子，使得由此形成的任何反应的石灰固体可被分离并安全地处理。该方法可以包括预苛化步骤，其中在去除铝酸根离子的步骤之前，首先将拜耳液体苛化以降低碳酸根离子的浓度。本发明提供了一种去除硫酸钠的有效方法和从硫酸钠中回收苏打的实用方法。石灰利用的效率也可以从约20％显着增加到50％（如果硫酸盐去除不是目标），其中可以最小化氧化铝损失。处理液的草酸盐浓度也显着低于通常在基于草酸钠结晶的方法中实现的草酸盐浓度。

7. 发明授权

US5427750A Polymers for removing humates from bayer process liquors 失效
标题翻译：用于从拜耳处理液中去除腐殖酸的聚合物
公开(公告)号：US5427750A
公开(公告)日：1995-06-27
申请号：US146283
申请日：1993-10-29
申请人： Anthony G. Sommese , Robert P. Mahoney
发明人： Anthony G. Sommese , Robert P. Mahoney
IPC分类号： B01D21/01 , C01F7/47 , C01F7/00
CPC分类号： B01D21/01 , C01F7/473
摘要： Organic impurities are removed from Bayer process liquors using a polymer which contains vinylamine and/or vinylformamide.
摘要翻译：使用含有乙烯胺和/或乙烯基甲酰胺的聚合物从拜耳法溶液中除去有机杂质。

8. 发明授权

US4443416A Purification of bayer process liquors 失效
标题翻译：拜耳加工液的净化
公开(公告)号：US4443416A
公开(公告)日：1984-04-17
申请号：US485807
申请日：1983-04-18
申请人： Donald J. Donaldson , Allan C. Kelly , Joseph W. Mulloy , Donald R. Zwakenberg
发明人： Donald J. Donaldson , Allan C. Kelly , Joseph W. Mulloy , Donald R. Zwakenberg
IPC分类号： C01F7/47 , C01F7/06
CPC分类号： C01F7/473
摘要： Sodium oxalate impurity is removed from oxalate-enriched Bayer process caustic liquor by gradual increase of the caustic concentration of the liquor, thus providing a staged precipitation of the sodium oxalate in a well-crystallized and readily filterable form.
摘要翻译：通过逐渐增加液体的苛性碱浓度，从富含草酸盐的拜耳加工苛性液中除去草酸钠杂质，从而提供草酸盐分层析出，结晶良好且易于过滤。

9. 发明授权

US4335082A Method of decreasing the organic substance content of alum earth production cycle performed according to the Bayer technology 失效
标题翻译：根据拜耳技术降低铝土矿生产周期有机物含量的方法
公开(公告)号：US4335082A
公开(公告)日：1982-06-15
申请号：US201722
申请日：1980-10-29
申请人： Jozsef Matyasi , Ferenc Toth , Laszlo Revesz , Benjaminne Toth , Miklos Schlegel , Jozsef Zoldi , Janosne Losonczi , Lajos Szoke , Maria Orban nee Kelemen
发明人： Jozsef Matyasi , Ferenc Toth , Laszlo Revesz , Benjaminne Toth , Miklos Schlegel , Jozsef Zoldi , Janosne Losonczi , Lajos Szoke , Maria Orban nee Kelemen
IPC分类号： C01F7/47 , C01F7/06 , C01F7/46
CPC分类号： C01F7/473
摘要： The invention relates to a new method of reducing the organic substance content of alum earth production cycle performed according to the Bayer technology. By the method of the invention the majority of the organic substances present in the circulating lye can be removed easily and with only slight losses in sodium content.According to the invention one proceeds so that soda present in the hydrate wash and/or in the soda salt solution is caustified with lime, the solution is evaporated to reach a total sodium oxide concentration of 200 to 400 g/l, the precipitated solid is separated and removed from the system, and the liquid is recycled.
摘要翻译：本发明涉及一种降低根据拜耳技术进行的矾土生产循环有机物含量的新方法。通过本发明的方法，存在于循环碱液中的大部分有机物质可以容易地除去，并且仅钠含量的轻微损失。根据本发明，进行水合物洗涤和/或苏打盐溶液中存在的苏打碱用石灰去除，蒸发溶液达到200-400g / l的总氧化钠浓度，沉淀的固体为从系统中分离并除去，液体被回收。

10. 发明授权

US4280987A Method for treatment of Bayer liquor 失效
标题翻译：拜耳液处理方法
公开(公告)号：US4280987A
公开(公告)日：1981-07-28
申请号：US53521
申请日：1979-06-29
申请人： Yasunori Yamada , Yuji Shibue
发明人： Yasunori Yamada , Yuji Shibue
IPC分类号： C01F7/14 , C01F7/47 , C01F7/06
CPC分类号： C01F7/144 , C01F7/473
摘要： Bayer liquor containing carbon compounds is freed from the carbon compounds by a method which comprises adjusting the molar ratio of the aluminum component to the sodium component in the liquid to a value in the range of from 1 to 5 calculated as Al.sub.2 O.sub.3 /Na.sub.2 O and heating the resultant Bayer liquor.
摘要翻译：含有碳化合物的拜耳液体通过包括将铝组分与液体中的钠组分的摩尔比调节为以Al 2 O 3 / Na 2计算的1至5的范围的值，并将结果拜耳酒。

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