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61. 发明授权

US5302368A Process for preparation of alumina 失效
标题翻译：氧化铝的制备方法
公开(公告)号：US5302368A
公开(公告)日：1994-04-12
申请号：US705620
申请日：1991-05-28
申请人： Takuo Harato , Toshiki Furubayashi , Toshio Ashitani , Toru Ogawa
发明人： Takuo Harato , Toshiki Furubayashi , Toshio Ashitani , Toru Ogawa
IPC分类号： C01F7/02 , C01F7/20 , C01F7/22
CPC分类号： C01F7/023 , C01P2004/03 , C01P2004/52 , C01P2004/61 , C01P2006/10 , C01P2006/12 , C01P2006/22 , C01P2006/80
摘要： An aqueous slurry of about 100-1000 centipoises viscosity suspending about 200-2000 g/l of aluminum hydroxide particles smaller than 5 .mu.m is spray-dried, and the dried powders are calcined to obtain alumina powders. The alumina powders have a sharp particle size distribution, being suitable for electronic, abrasive and refractory applications.
摘要翻译：将约100-1000厘泊粘度悬浮于约200-2000g / l小于5（my）m的氢氧化铝颗粒的水浆料喷雾干燥，并将干燥的粉末煅烧以获得氧化铝粉末。氧化铝粉末具有尖锐的粒度分布，适用于电子，磨料和耐火材料应用。

62. 发明授权

US4548795A Treatment of aluminous materials 失效
标题翻译：铝材料的处理
公开(公告)号：US4548795A
公开(公告)日：1985-10-22
申请号：US608806
申请日：1984-05-10
申请人： William H. Andrews , David J. Milne , Ronald W. Moyle , James P. Peters
发明人： William H. Andrews , David J. Milne , Ronald W. Moyle , James P. Peters
IPC分类号： C01F7/22 , C01F7/30 , C01F7/46 , C01F7/56 , C04B35/101
CPC分类号： C01F7/22 , C01F7/306 , C01F7/56
摘要： A leaching process employing acidic chloride solutions, whereby the iron content of aluminous materials such as lower grade iron-containing bauxite ores is reduced, enabling the obtention of valuable products such as metallurgical grade alumina and refractory grade bauxite, previously obtainable only from higher grade low-iron aluminous materials.
摘要翻译：使用酸性氯化物溶液的浸出方法，由此降低了含铝材料如低含量的含铝铝土矿的铁含量，从而能够获得先前仅从较高等级的低级别获得的有价值的产品如冶金级氧化铝和耐火级铝土矿铁铝材料。

63. 发明授权

US4366129A Process for producing alumina and ferric oxide from aluminium carriers with high iron and silicon content 失效
标题翻译：具有高铁和硅含量的铝载体生产氧化铝和氧化铁的方法
公开(公告)号：US4366129A
公开(公告)日：1982-12-28
申请号：US251997
申请日：1981-04-08
申请人： Bela Czegledi , Mihaly Csovari , Miklos Erdelyi , Lajos Streker , Istvan Toth , Katalin Szabo nee Mogyorosi , Szilard Riederauer , Geza Szentgyorgyi
发明人： Bela Czegledi , Mihaly Csovari , Miklos Erdelyi , Lajos Streker , Istvan Toth , Katalin Szabo nee Mogyorosi , Szilard Riederauer , Geza Szentgyorgyi
IPC分类号： C01F7/22 , C01F7/26 , C01G49/00 , C01G49/06 , C21B15/00
CPC分类号： C01G49/06 , C01F7/26 , C01G49/0009 , C21B15/006 , C22B3/24 , C22B3/42 , Y02P10/234
摘要： The invention concerns a process for the preparation of alumina and ferric oxide from low-grade aluminium and iron carriers. The processes, in addition to conventional technological steps, comprises the steps of dissolving the iron content of a ground, mineral material in an aqueous hydrochloric acid solution containing 200 to 420 g./lit. of hydrochloric acid at 90.degree. to 130.degree. C., eliminating the iron from the slurry of from a solution obtained by filtration of the slurry, with an anion exchange resin or semipermeable membrane or cloth, continuously or discontinuously, eluting the iron from the ion exchange resin and recycling hydrochloric acid and sulfuric acid in a closed system.
摘要翻译：本发明涉及从低级铝和铁载体制备氧化铝和氧化铁的方法。除了常规技术步骤之外，这些方法包括将研磨的矿物材料的铁含量溶解在含有200至420g / L的盐酸水溶液中的步骤。的盐酸在90至130℃下，从阴离子交换树脂或半透膜或布连续或不连续地从通过过滤浆液获得的溶液的浆料中除去铁，从离子中洗脱铁交换树脂，并在封闭系统中回收盐酸和硫酸。

64. 发明授权

US4241030A Continuous process for obtaining pure alumina from an acidic liquor originating from the chlorosulphuric attack of an aluminous ore and for the purification of the liquor which has been freed from alumina 失效
标题翻译：用于从酸性矿石的氯硫化物侵蚀的酸性液体中获得纯氧化铝和用于纯化已经从氧化铝中除去的液体的连续方法
公开(公告)号：US4241030A
公开(公告)日：1980-12-23
申请号：US35439
申请日：1979-05-08
申请人： Joseph Cohen , Alain Adjemian , Michel Ferran
发明人： Joseph Cohen , Alain Adjemian , Michel Ferran
IPC分类号： C01F7/20 , C01F7/26 , C01F7/22
CPC分类号： C01F7/20 , C01F7/26
摘要： A process for obtaining pure alumina comprising the combination of chlorosulphuric attack of calcined aluminous ores containing impurities, followed by concentration of the liquor obtained after the attack and separation of the sterile material, sulphuric acid treatment of the concentrated liquor followed by chlorination to precipitate almost all the hexahydrated aluminum chloride, separation of the precipitate of hexahydrated aluminum chloride and of the chlorosulphuric mother liquor charged with impurities, pyrohydrolysis of the precipitate to give the desired pure alumina with recycling of released hydrochloric acid, degassing of the chlorosulphuric liquor of impurities with recycling of the gaseous HCl for chlorination, yielding a sulphuric liquor of impurities, finally the elimination of the impurities present in this latter liquor in the form of a sulphuric precipitation by concentration in the presence of potassium ions.
摘要翻译：一种获得纯氧化铝的方法，其中包含含有杂质的煅烧铝矿石的氯硫化反应的组合，然后浓缩在攻击后获得的液体和无菌材料的分离，硫酸处理浓缩液体，接着氯化沉淀几乎所有六水氯化铝，六水氯化铝沉淀物和带有杂质的氯硫母液的分离，将沉淀物进行热水解，得到所需的纯氧化铝，再循环释放的盐酸，将氯磺酸的杂质脱气回收用于氯化的气态HCl，产生杂质的硫酸液，最后通过在钾离子存在下浓缩，以后者液体中存在的杂质以硫酸沉淀的形式消除。

65. 发明授权

US4239735A Removal of impurites from clay 失效
标题翻译：从粘土中去除杂质
公开(公告)号：US4239735A
公开(公告)日：1980-12-16
申请号：US72957
申请日：1979-09-06
申请人： Judith A. Eisele , Donald J. Bauer , Paul R. Bremner
发明人： Judith A. Eisele , Donald J. Bauer , Paul R. Bremner
IPC分类号： C01F7/22
CPC分类号： C01F7/22
摘要： A method for producing substantially pure alumina from kaolin clay by removing in a soluble form impurities which contaminate the alumina while the aluminum is maintained in an insoluble form. This is accomplished by leaching calcined kaolin clay with at least 36 weight percent hydrochloric acid to dissolve the impurities and convert the aluminum to insoluble aluminum chloride and maintaining the hydrochloric acid concentration in the leach liquor at at least 36 weight percent by the injection of hydrochloric acid gas. The insoluble aluminum chloride is then separated from the dissolved impurities and subjected to a second leaching step to solubilize and separate it from the silica gangue. Substantially pure AlCl.sub.3.sup.. 6H.sub.2 O crystals are recovered from solution and converted to alumina by conventional means. In an alternate embodiment, the process may be practiced on uncalcined clay and includes the addition of a source of fluoride ions, such as H.sub.2 SiF.sub.6, to the at least 36 weight percent hydrochloric acid leach liquor. An optional preleaching step utilizing 2N to 6N mineral acid is also disclosed.
摘要翻译：一种从高岭土生产基本上纯的氧化铝的方法，通过以可溶形式除去在铝保持不溶形式时污染氧化铝的杂质。这是通过用至少36重量％盐酸的煅烧高岭土浸出来溶解杂质并将铝转化成不溶性氯化铝并通过注入盐酸将浸出液中的盐酸浓度保持在至少36重量％来实现的加油站。然后将不溶性氯化铝与溶解的杂质分离，并进行第二浸出步骤以溶解并将其与二氧化硅g石分离。从溶液中回收基本纯的AlCl3.6H2O晶体，并通过常规方法转化为氧化铝。在一个替代实施方案中，该方法可以在未煅烧的粘土上实施，并且包括向至少36重量％的盐酸浸出液中加入氟离子源，例如H 2 SiF 6。还公开了使用2N至6N无机酸的任选的预漂洗步骤。

66. 发明授权

US4237102A Process for obtaining pure alumina by the hydrochloric attack of aluminous ores and extraction of the impurities by means of a sulphuric treatment 失效
标题翻译：通过铝矿石的盐酸攻击获得纯氧化铝的方法，并通过硫酸处理萃取杂质
公开(公告)号：US4237102A
公开(公告)日：1980-12-02
申请号：US35440
申请日：1979-05-08
申请人： Joseph Cohen , Alain Adjemian
发明人： Joseph Cohen , Alain Adjemian
IPC分类号： C01F7/22 , C01F7/30 , C01F7/56 , C01F7/26
CPC分类号： C01F7/306 , C01F7/22 , C01P2006/80
摘要： A cyclic process for obtaining very pure alumina by the hydrochloric acid attack of a silico-aluminous material, the said process comprising, in a first stage, the precipitation of at most 75% of the alumina present in the liquor originating from the attack in the form of hexahydrated aluminum chloride which is subsequently decomposed by heating, then, in a second stage, the treatment of the liquor leaving the first stage with HCl gas in order to precipitate dissolved Al.sub.2 O.sub.3 in the form of hexahydrated aluminum chloride which is recycled into the liquor leaving the attack, while the hydrochloric liquor leaving the second stage and impoverished in Al.sub.2 O.sub.3 but rich in impurities, is treated with a recycled sulphuric liquor in order to precipitate impurities as their corresponding sulphates.
摘要翻译：用于通过硅铝酸盐材料的盐酸侵蚀获得非常纯的氧化铝的循环方法，所述方法包括在第一阶段中沉淀出至少75％的来自于在六水氯化铝的形式，其随后通过加热分解，然后在第二阶段中，用HCl气体处理离开第一阶段的液体，以便将六水氯化铝的溶解的Al 2 O 3沉淀，将其再循环到液体中留下攻击，而离开第二阶段并在Al2O3中贫瘠，但富含杂质的盐酸溶液用再循环的硫酸溶液处理，以便将杂质沉淀为相应的硫酸盐。

67. 发明授权

US4224287A Process for the preparation of pure aluminum oxide 失效
标题翻译：纯氧化铝的制备方法
公开(公告)号：US4224287A
公开(公告)日：1980-09-23
申请号：US32904
申请日：1979-04-24
申请人： Siegfried Ziegenbalg , Gerhard Fischer , Gerhard Haake , Rudolf Siebert
发明人： Siegfried Ziegenbalg , Gerhard Fischer , Gerhard Haake , Rudolf Siebert
IPC分类号： C01F7/20 , C01F7/22 , C01F7/30 , C22B3/28 , C22B3/38
CPC分类号： C01F7/306 , C01F7/22 , C22B3/0012 , C22B3/0068 , C01P2006/11 , C01P2006/12 , Y02P10/234
摘要： In the process for the preparation of pure aluminum oxide by the steps of hydrochloric acid decomposition of mechanically or thermally activated clay or alumina containing minerals, separating the insoluble residue, removing the iron from the solution, crystallizing the aluminum chloride in the iron-free solution, thermally decomposing the crystallizate to aluminum oxide and recovering the hydrochloric acid from the decomposition gases, the improvement comprising effecting the process by the steps of mechanically pretreating the clay, drying the pretreated clay, thermally or mechanically activating the clay, subjecting the activated clay to circulating leaching, separating the leached material into an SiO.sub.2 containing residue and an AlCl.sub.3 solution, extracting the AlCl.sub.3 solution to an evaporating crystallization and thermally decomposing the crystals to produce .alpha.-Al.sub.2 O.sub.3. All of the stages are interrelated one to the other for maximum recovery of byproducts, heat, acid and the like. The .alpha.-Al.sub.2 O.sub.3 is directly produced in a form of high purity suitable for most applications.
摘要翻译：在通过盐酸分解机械或热活化的粘土或含氧化铝的矿物质的步骤制备纯氧化铝的过程中，分离不溶残余物，从溶液中除去铁，使无铁溶液中的氯化铝结晶将结晶物热分解成氧化铝并从分解气中回收盐酸，其改进包括通过机械预处理粘土，干燥预处理的粘土，热或机械活化粘土，将活化的粘土循环浸出，将浸出的材料分离成含SiO 2的残渣和AlCl 3溶液，将AlCl 3溶液萃取至蒸发结晶并热分解晶体以产生α-Al2O3。所有的阶段都是相互关联的，用于副产物，热，酸等的最大回收。直接以大多数应用的高纯度形式生产α-Al2O3。

68. 发明授权

US4172879A Ferric iron removal from aluminum fluoride solutions 失效
标题翻译：从氟化铝溶液中除铁
公开(公告)号：US4172879A
公开(公告)日：1979-10-30
申请号：US895085
申请日：1978-04-10
申请人： David J. Miller , Tadeusz K. Wiewiorowski
发明人： David J. Miller , Tadeusz K. Wiewiorowski
IPC分类号： C01B7/19 , C01F7/20 , C01F7/22 , C01F7/50 , C01G49/00 , C22B3/38 , C22B3/40 , C01G49/10
CPC分类号： C22B3/0095 , C01B7/191 , C01F7/20 , C01F7/22 , C01F7/50 , C01G49/0009 , C22B3/0093 , Y02P10/234
摘要： A process for the selective separation of ferric iron from an aluminum fluoride aqueous solution containing ferric iron is effected by contacting said solution with an organic extractant phase consisting essentially of a mixture of a mono (higher alkyl-substituted phenyl) phosphoric acid and a di(higher alkyl-substituted phenyl) phosphoric acid dissolved in an inert diluent to thereby transfer the ferric iron to said organic extractant phase. The efficiency of the process is further improved by adjusting the aluminum fluoride aqueous feed solution to a temperature in the range of about 140.degree. F. to about 175.degree. F. prior to contacting it with the organic extractant phase, maintaining the temperature within this range throughout the ferric iron extraction stage or stages, then heating the resulting iron-depleted aqueous raffinate to a temperature higher than 195.degree. F., and then crystallizing aluminum fluoride trihydrate out of the raffinate at this higher temperature.
摘要翻译：通过使所述溶液与基本上由单（高级烷基取代的苯基）磷酸和二（高级烷基取代的苯基）磷酸酯的混合物组成的有机萃取剂相接触来实现从含有三价铁的氟化铝水溶液中选择性分离三价铁的方法高级烷基取代的苯基）磷酸溶解在惰性稀释剂中，从而将三价铁转移到所述有机萃取剂相。在将氟化铝水性进料溶液与有机萃取剂相接触之前将氟化铝水性进料溶液调节至约140°F至约175°F的温度，进一步提高了该方法的效率，将温度保持在该范围内在整个三铁提取阶段或阶段，然后将得到的贫铁水提余液加热到高于195°F的温度，然后在更高的温度下从提余液中结晶出氟化铝三水合物。

69. 发明授权

US4158042A Recovery of alumina from siliceous minerals 失效
标题翻译：从硅质矿物中回收氧化铝
公开(公告)号：US4158042A
公开(公告)日：1979-06-12
申请号：US946345
申请日：1978-09-27
申请人： John E. Deutschman
发明人： John E. Deutschman
IPC分类号： C01F7/22 , C01F7/20
CPC分类号： C01F7/22
摘要： A process for the production of alumina from siliceous minerals containing substantial quantities of combined aluminium and calcium comprises the steps of treating the finely divided mineral with a hot acid liquor containing chloride, fluoride and calcium ions to extract alumina values from the mineral; recovering aluminium chloride from the liquid extract; recycling one fraction of the spent extract to the mineral extraction stage; and treating another fraction of the spent extract to regenerate hydrogen chloride gas for re-use in the process.
摘要翻译：含有大量组合铝和钙的含硅矿物的氧化铝生产方法包括以下步骤：用含有氯化物，氟化物和钙离子的热酸液处理细碎矿物，从矿物中提取氧化铝值; 从液体提取物中回收氯化铝; 将一部分废弃的提取物回收到矿物提取阶段; 并处理另一部分的废提取物以再生氯化氢气体以便在该过程中重复使用。

70. 发明授权

US4110399A Process for the extraction of alumina from aluminum-containing silicates 失效
标题翻译：从含铝硅酸盐中提取氧化铝的方法
公开(公告)号：US4110399A
公开(公告)日：1978-08-29
申请号：US782826
申请日：1977-03-30
申请人： Bjorn Gaudernack , Norvald Gjelsvik , Leif Farbu
发明人： Bjorn Gaudernack , Norvald Gjelsvik , Leif Farbu
IPC分类号： C01F7/20 , C01F7/26 , C01G49/06 , C01F7/22
CPC分类号： C01F7/26 , C01F7/20 , C01G49/06
摘要： A process for the extraction of alumina from aluminum-containing silicates is disclosed. The process comprises acid leaching of the raw material, iron extraction, precipitation of the aluminum fraction as the aluminum chloride hexahydrate, removal of sodium chloride and calcination to alumina. The process can be made continuous with substantial regeneration and recycling of process components.
摘要翻译：公开了一种从含铝硅酸盐中提取氧化铝的方法。该方法包括原料酸浸，铁提取，铝馏分沉淀为氯化铝六水合物，去除氯化钠并煅烧成氧化铝。该方法可以连续地进行，同时进行大量再生和回收过程组件。

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