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81. 发明授权

US4046855A Method for removing harmful organic compounds from aluminate liquors of the Bayer process 失效
标题翻译：从拜耳法的铝酸盐液中除去有害有机化合物的方法
公开(公告)号：US4046855A
公开(公告)日：1977-09-06
申请号：US676883
申请日：1976-04-14
申请人： Bernhard Schepers , Gerhard Bayer , Ernst Urmann , Klaus Schanz
发明人： Bernhard Schepers , Gerhard Bayer , Ernst Urmann , Klaus Schanz
IPC分类号： C01F7/14 , C01F7/47 , C01F7/00 , C01F7/46
CPC分类号： C01F7/473
摘要： A method is provided for removing harmful organic compounds from the aluminate liquor obtained in the production of alumina according to the Bayer process. A magnesium obtained is added to the aluminate liquor to form a hydroxide mixture containing magnesium hydroxide and aluminum hydroxide which precipitates from the aluminate liquor. The precipitated mixture is maintained in the aluminate liquor, while being stirred, until at least a part of the organic compounds have been eliminated from the aluminate liquor. The hydroxide mixture containing the organic compounds then is separated from the aluminate liquor.
摘要翻译：提供了一种根据拜耳法从氧化铝生产中获得的铝酸盐溶液中除去有害有机化合物的方法。将获得的镁加入到铝酸盐溶液中以形成氢氧化铝混合物，其中含有从铝酸盐液中析出的氢氧化镁和氢氧化铝。将沉淀的混合物在搅拌下保持在铝酸盐溶液中，直到至少一部分有机化合物已从铝酸盐液体中除去。然后将含有有机化合物的氢氧化物混合物与铝酸盐液体分离。

82. 发明授权

US3899571A Method for the removal of organic substances from sodium aluminate solution 失效
标题翻译：从铝酸钠溶液中去除有机物质的方法
公开(公告)号：US3899571A
公开(公告)日：1975-08-12
申请号：US42163873
申请日：1973-12-04
申请人： SUMITOMO CHEMICAL CO
发明人： YAMADA KOICHI , HASHIMOTO TADANORI , NAKANO KAZUHIKO
IPC分类号： C01F7/47 , C01F7/04 , C01F7/06 , C01F7/34
CPC分类号： C01F7/473
摘要： The present invention relates to a method for the removal of organic substances from a sodium aluminate solution in the production of alumina from bauxite in accordance with the Bayer process, the improvement which involves adding sodium oxalate crystals as seeds to a sodium aluminate solution for a time period which spans from after the aluminum hydroxide step to before the dissolution step, thereby precipitating organic substances mainly composed of sodium oxalate in the said sodium aluminate solution; separating the crystals of organic substances from the sodium aluminate solution, washing the said separated crystals with an aqueous solution to remove most of the organic substances newly deposited on the seeds from the separated crystals and recycling the sodium oxalate crystals as seeds for precipitating organic substances after the removal of substantially all of the newly deposited organic substances.
摘要翻译：本发明涉及根据拜耳方法从铝土矿生产氧化铝中的铝酸钠溶液中除去有机物质的方法，其改进在于将草酸钠晶体作为种子加入铝酸钠溶液中一段时间在氢氧化铝步骤之前到溶解步骤之间的时间段，由此在所述铝酸钠溶液中沉淀主要由草酸钠组成的有机物质; 从铝酸钠溶液中分离出有机物质的晶体，用水溶液洗涤所述分离的晶体，以从分离的晶体中除去新沉积在种子上的大部分有机物质，并将草酸钠晶体作为种子沉淀出来，以沉淀有机物质几乎全部去除了新沉积的有机物质。

83. 发明授权

US3560148A Process for purifying industrial solutions of sodium aluminate 失效
标题翻译：纯化铝酸钠工业溶液的方法
公开(公告)号：US3560148A
公开(公告)日：1971-02-02
申请号：US3560148D
申请日：1968-03-15
申请人： PECHINEY PROD CHIMIQUES SA , APP ET EVAPORATEURS KESTNER SO
发明人： TAMISE LOUIS , MILLET JACQUES
IPC分类号： C01F7/47 , C01F7/06
CPC分类号： C01F7/473
摘要： A PROCESS FOR THE REMOVAL OF SODIUM CARBONATE FROM ALUMINATE SOLUTIONS GENERATED DURING THE ATTACK ON BAUXITE WITH CAUSTIC SODA FOR THE RECOVERY OF ALUMINA, WHEREIN, AFTER THE SOLUTION IS HYDROLYZED AND THE PRECIPITATED ALUMINUM TRIHYDRATE SEPARATED, THE SOLUTION IS PROCESSED THROUGH A SERIES OF EVAPORATORS WHEREIN THE CONCENTRATION AND TEMPERATURE ARE INCREASED AND A SERIES OF EXPANSIONS IN WHICH THE SUSPENSION IS CONCENTRATED AND COOLED TO A TEMPERATURE WITHIN THE RANGE OF 50* TO 60*C. AND A CONCENTRATION OF 300-330 GRAMS PER LITER OF TOTAL NA2O WITH THE ACCOMPANYING PRECIPITATION OF SODIUM CARBONATE AS FINE CRYSTALS AND ADDING A CONCENTRATED SOLUTION OF CAUSTIC SODA TO THE SUSPENSION TO RAISE THE TOTAL NA2O CONTENT TO ABOUT 350 GRAMS PER LITER WHEREBY, WITHOUT SUBSEQUENT HEATING, THE SODIUM CARBONATE CRYSTALS ARE INCREASED IN SIZE FOR EASIER SEPARATION.

84. 发明授权

US3457032A Process for purifying solutions containing aluminates 失效
标题翻译：用于净化含铝的溶液的方法
公开(公告)号：US3457032A
公开(公告)日：1969-07-22
申请号：US3457032D
申请日：1965-05-11
申请人： ALUSUISSE
发明人： BRETEQUE PIERRE DE LA
IPC分类号： C01F7/02 , C01F7/47 , C01F7/14 , C01F7/36
CPC分类号： C01F7/47 , C01F7/02 , C01F7/473

85. 发明授权

US3337305A Purifying caustic aluminate solutions with ammonia 失效
标题翻译：用氨净化苛性铝酸钠溶液
公开(公告)号：US3337305A
公开(公告)日：1967-08-22
申请号：US36723364
申请日：1964-05-13
申请人： KAISER ALUMINIUM CHEM CORP
发明人： BYRNS ALVA C
IPC分类号： C01F7/47
CPC分类号： C01F7/47 , C01F7/473

86. 发明授权

US3120996A Control of process carbonation in bayer type alumina plants 失效
标题翻译：拜耳型氧化铝工厂中工艺碳酸化的控制
公开(公告)号：US3120996A
公开(公告)日：1964-02-11
申请号：US2328360
申请日：1960-04-19
申请人： KAISER ALUMINIUM CHEM CORP
发明人： PORTER JOHN L
IPC分类号： C01F7/06 , C01F7/47
CPC分类号： C01F7/473 , C01F7/066

87. 发明授权

US2806766A Process of purifying caustic aluminate liquors 失效
标题翻译：苛性铝酸盐液的净化工艺
公开(公告)号：US2806766A
公开(公告)日：1957-09-17
申请号：US32310852
申请日：1952-11-28
申请人： KAISER ALUMINIUM CHEM CORP
发明人： ANDERSON ARVID A
IPC分类号： C01F7/47
CPC分类号： C01F7/473 , Y10S159/34

88. 发明授权

US1268015A Process of making aluminum chlorid. 失效
标题翻译：制备氯铝酸盐的方法。
公开(公告)号：US1268015A
公开(公告)日：1918-05-28
申请号：US17500617
申请日：1917-06-15
申请人： GULF REFINING CO
发明人： KING GEORGE H , ROBERTS GERALD I
CPC分类号： C01F7/473

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