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41. 发明授权

US4495159A Extraction of arsenic in solution in liquors containing alkali metal carbonate, sulphate and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum 失效
标题翻译：在含有碱金属碳酸盐，硫酸盐和可能的氢氧化物以及至少一种金属钒，铀和钼的液体中溶液中的砷的提取
公开(公告)号：US4495159A
公开(公告)日：1985-01-22
申请号：US398832
申请日：1982-07-16
申请人： Pierre Maurel
发明人： Pierre Maurel
IPC分类号： C01D1/04 , C01F7/47 , C01G28/02 , C01G43/00
CPC分类号： C01F7/47 , C01D1/04 , C01F7/473 , C01G28/023 , C01P2006/80
摘要： A process for extracting arsenic from aqueous solution to be purified, in accordance with claim 1 of U.S. Pat. No. 2,404,601, which also contains alkali metal carbonate, sulphate, hydroxide or hydrogen carbonate, and which may also contain at least one of the metals vanadium, uranium and molybdenum, comprising caustification of said solutions by means of lime to convert the carbonates into alkali metal hydroxides, followed by separation of an alkali metal hydroxide-enriched liquor and a first precipitate essentially containing calcium carbonate which is subjected to a washing operation, concentration by evaporation of the mixture of the washing liquor of the first precipitate to produce a second precipitate which essentially comprises alkali metal sulphate, which is characterized in that, before the aqueous solution is caustified, the aqueous solution is treated by a magnesium compound in an amount at least equal to the stoichiometric amount required to cause precipitation of magnesium arsenate.
摘要翻译：根据权利要求1所述的用于从要净化的水溶液中提取砷的方法。还包含碱金属碳酸盐，硫酸盐，氢氧化物或碳酸氢盐，并且还可以含有钒，铀和钼中的至少一种金属，包括通过石灰将所述溶液沉淀以将碳酸盐转化为碱金属氢氧化物，然后分离富含碱金属氢氧化物的液体和基本上含有碳酸钙的第一沉淀物，其进行洗涤操作，通过蒸发第一沉淀物的洗涤液的混合物浓缩以产生第二沉淀，基本上包括碱金属硫酸盐，其特征在于，在水溶液被除去之前，水溶液用至少等于引起砷酸镁沉淀所需的化学计量的镁化合物处理。

42. 发明授权

US4430310A Purification of impure Bayer process liquors 失效
标题翻译：净化不纯的拜耳加工液
公开(公告)号：US4430310A
公开(公告)日：1984-02-07
申请号：US464817
申请日：1983-02-08
申请人： John T. Malito , Gordon C. Rogers, Jr.
发明人： John T. Malito , Gordon C. Rogers, Jr.
IPC分类号： C01D5/00 , C01D7/00 , C01F7/47 , C01F7/06
CPC分类号： C01F7/47 , C01D5/00 , C01D7/00 , C01F7/473 , Y02P20/129
摘要： Bayer process caustic liquors are purified by treating the liquors with an organic solvent of relatively low boiling point, such as methanol, which causes the precipitation of inorganic carbonate and/or sulfate salt from the treated liquor. The treating solvent can be readily recovered for reuse.
摘要翻译：通过用相对低沸点的有机溶剂（例如甲醇）处理液体来纯化拜耳法苛性液体，这导致来自处理液体的无机碳酸盐和/或硫酸盐的沉淀。处理溶剂可以容易地回收再利用。

43. 发明授权

US4275042A Removal of oxalate from Bayer process liquor 失效
标题翻译：从拜耳法处理液中除去草酸盐
公开(公告)号：US4275042A
公开(公告)日：1981-06-23
申请号：US114281
申请日：1980-01-22
申请人： Gordon Lever
发明人： Gordon Lever
IPC分类号： C01F7/47 , C01F7/06 , C01F7/46
CPC分类号： C01F7/473
摘要： Sodium oxalate in supersaturated solution in Bayer spent liquor stabilized by the presence of humic material is precipitated by the treatment with cationic sequestrants which interact with the humic material to give an insoluble product, thus removing it from solution and destabilizing the solution with respect to precipitation of sodium oxalate. Preferred cationic sequestrants are quaternary nitrogen compounds including medium or long chain alkyl groups. Precipitation of sodium oxalate can be expidited by addition of seed crystals and/or addition of sodium oxalate solution which is supersaturated at a temperature higher than that of the spent liquor.
摘要翻译：通过用与腐殖质材料相互作用的阳离子多价螯合剂的处理沉淀在通过腐殖质材料存在而稳定的拜耳废液中的过饱和溶液中的草酸盐溶液，得到不溶性产物，从而从溶液中除去溶液并使溶液失稳草酸钠。优选的阳离子螯合剂是包括中等或长链烷基的季氮化合物。草酸钠的沉淀可以通过加入晶种和/或添加在高于废液的温度下过饱和的草酸钠溶液来消除。

44. 发明授权

US4263261A Method for the removal of impurities from sodium aluminate solution 失效
标题翻译：从铝酸钠溶液中除去杂质的方法
公开(公告)号：US4263261A
公开(公告)日：1981-04-21
申请号：US103349
申请日：1979-12-13
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
IPC分类号： C01F7/47 , C01F7/06
CPC分类号： C01F7/473 , C01F7/47
摘要： Impurities such as organic substances, i.e. sodium oxalate and inorganic impurities, i.e. sodium salts of vanadium and phosphorus or double salts containing the latter sodium salts are removed from a sodium aluminate solution in the production of alumina from bauxite according to the Bayer process by adding sodium oxalate crystals or both sodium oxalate crystals and at least one of sodium salts of vanadium and phosphorus, or double salts containing the latter sodium salts as seed to the sodium aluminate solution in the course of after the precipitation step of aluminum hydroxide to before the digestion step, thereby precipitating crystals of said impurities, separating the crystals of said impurities from the sodium aluminate solution, dissolving about 10 to 50% by weight of the amount of the newly precipitated organic substances from the separated crystals of said impurities in an aqueous unsaturated sodium oxalate solution, and recyclically using the crystals resulting from the dissolution together with the resulting solution as seed for the precipitation of the impurities in the sodium aluminate solution. The impurities can be simply and effectively removed.
摘要翻译：根据拜耳方法，从铝矾土生产氧化铝中的铝酸钠溶液中除去有机物质，如草酸钠和无机杂质，即含有钒和磷的钠盐，或含有后钠盐的双盐等杂质，草酸盐晶体或草酸二钠晶体和钒和磷的钠盐中的至少一种，或在氢氧化铝在消化步骤之前的沉淀步骤之后，将含有后者钠盐作为种子的双重盐加入到铝酸钠溶液中从而使所述杂质的晶体析出，从铝酸钠溶液中分离出所述杂质的晶体，将来自所述杂质的分离晶体的新沉淀的有机物的量溶解在不饱和草酸钠水溶液中约10〜50重量％溶液，并循环使用由此产生的晶体与所得溶液一起作为用于沉淀铝酸钠溶液中的杂质的种子。可以简单有效地除去杂质。

45. 发明授权

US4101629A Purification of solutions circulating in the bayer cycle 失效
标题翻译：纯化在拜耳循环中循环的溶液
公开(公告)号：US4101629A
公开(公告)日：1978-07-18
申请号：US734188
申请日：1976-10-20
申请人： Henri Mercier , Robert Magrone , Jean Deabriges
发明人： Henri Mercier , Robert Magrone , Jean Deabriges
IPC分类号： C01F7/06 , C01F7/47
CPC分类号： C01F7/473 , C01F7/06
摘要： Process for treating solutions from the Bayer process, enabling amounts of sodium carbonate and sodium oxalate or sodium salts of organic acids corresponding to the amounts of these compounds dissolved during the attack on a bauxite to be removed by means of a barium compound, and without consumption of the latter.
摘要翻译：用于处理来自拜耳法的溶液的方法，使得能够使用量相应于在攻击期间溶解的这些化合物的量的碳酸钠和草酸钠或钠盐通过钡化合物除去铝土矿并且不消耗的后者。

46. 发明授权

US3512926A Process for purification of sodium aluminate liquors 失效
标题翻译：纯化铝酸钠液体的方法
公开(公告)号：US3512926A
公开(公告)日：1970-05-19
申请号：US3512926D
申请日：1967-05-19
申请人： PECHINEY PROD CHIMIQUES SA
发明人： MERCIER HENRI ANTOINE , COHEN JOSEPH
IPC分类号： C01F7/47 , C01F7/02
CPC分类号： C01F7/473 , C01F7/47

47. 发明授权

US1099096A Manufacture of aluminum chlorid. 失效
标题翻译：氯化铝的制造。
公开(公告)号：US1099096A
公开(公告)日：1914-06-02
申请号：US1914818285
申请日：1914-02-12
申请人： MCAFEE ALMER MCDUFFIE
发明人： MCAFEE ALMER MCDUFFIE
CPC分类号： C01F7/473

48. 发明授权

US12006225B2 Bayer process 有权
公开(公告)号：US12006225B2
公开(公告)日：2024-06-11
申请号：US16971379
申请日：2019-02-22
申请人： Rio Tinto Alcan International Limited
发明人： Neil Hofstee , Alistair Gillespie , Tomas Mach , Warren Staker
IPC分类号： C01F7/473 , B01J20/18 , C01F7/145 , C01F7/147
CPC分类号： C01F7/473 , B01J20/18 , C01F7/145 , C01F7/147 , B01J2220/4887
摘要： A Bayer process increases oxalate removal in the red side of the Bayer process and at least substantially minimises, for example by at least substantially suppressing, precipitation of oxalates in the white side of the Bayer process.

49. 发明申请

US20130195739A1 CROSS-LINKED ETHYLSULFONATED DIHYDROXYPROPYL CELLULOSE 有权
标题翻译：交联乙二醇二羟丙基纤维素
公开(公告)号：US20130195739A1
公开(公告)日：2013-08-01
申请号：US13798761
申请日：2013-03-13
申请人： Nalco Company
发明人： Heinrich E. Bode , John D. Kildea
IPC分类号： C22B21/00
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。

50. 发明申请

US20110200503A1 COMPOSITION AND METHOD FOR IMPROVED ALUMINUM HYDROXIDE PRODUCTION 审中-公开
标题翻译：改进的氢氧化铝生产的组合物和方法
公开(公告)号：US20110200503A1
公开(公告)日：2011-08-18
申请号：US13096018
申请日：2011-04-28
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： C01F7/02 , C09K3/00
CPC分类号： C01F7/02 , C01F7/14 , C01F7/145 , C01F7/473
摘要： An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.
摘要翻译：用于从沉淀液制备氢氧化铝晶体的改进方法和组合物包括加入包含C 8 -C 10脂肪酸的乳化晶体生长调节剂，其前体，盐或其共混物。乳化晶体生长改性剂也有助于氢氧化铝的粒度分布的向上偏移和草酸盐球尺寸的向上移动。

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