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    Production of aluminum compound
    3.
    发明授权
    Production of aluminum compound 失效
    生产铝化合物

    公开(公告)号：US5445807A

    公开(公告)日：1995-08-29

    申请号：US462409

    申请日：1990-01-09

    申请人： Alan Pearson

    发明人： Alan Pearson

    IPC分类号： C01F7/44 ,  C04B35/111 ,  C01F7/20

    CPC分类号： C01F7/448 ,  B82Y30/00 ,  C04B35/1115 ,  C01P2002/01 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12

    摘要： A method of manufacture including bringing seed and aluminum hydroxide together in an aqueous medium and hydrothermally digesting for producing boehmite at the expense of the aluminum hydroxide is described. Also disclosed is a process for forming a ceramic body from colloidal boehmite and alpha alumina. Alpha alumina is added to ultimately produce a seeded gel containing microcrystalline boehmite, the seeded gel capable of being sintered at a low temperature to produce a ceramic product. The colloidal boehmite may be purified by ion exchange to remove alkali metal ions.

    摘要翻译： 描述了一种制造方法，其包括将种子和氢氧化铝一起放在水性介质中，并以氢氧化铝为代价水热消化生产勃姆石。 还公开了一种由胶体勃姆石和α氧化铝形成陶瓷体的方法。 加入α氧化铝以最终产生含有微晶勃姆石的接种凝胶，所述接种的凝胶能够在低温下烧结以制备陶瓷产品。 可以通过离子交换纯化胶体勃姆石以除去碱金属离子。

    Method of obtaining pure alumina by acid attack on aluminous minerals containing other elements
    4.
    发明授权
    Method of obtaining pure alumina by acid attack on aluminous minerals containing other elements 失效
    通过酸侵蚀获得含有其他元素的含铝矿物的纯氧化铝的方法

    公开(公告)号：US4177242A

    公开(公告)日：1979-12-04

    申请号：US876205

    申请日：1978-02-09

    申请人： Joseph Cohen ,  Alain Adjemian

    发明人： Joseph Cohen ,  Alain Adjemian

    IPC分类号： C01F7/26 ,  C01F7/74 ,  C01F7/20 ,  C01G15/00 ,  C22B21/00

    CPC分类号： C01F7/26 ,  C01F7/74

    摘要： A method of obtaining alumina of high purity from aluminous mineral containing impurities by attacking the mineral with a sulphuric acid liquor and separating the resulting liquor from a residue which remains after the attack, the steps of(a) mixing the resulting liquor with a liquor containing HCl and H.sub.2 SO.sub.4,(b) introducing HCl gas into the mixture,(c) cooling the mixture from step (b) to precipitate hydrated aluminum chlorosulphate crystals having the formula AlSO.sub.4 Cl.6-7H.sub.2 O,(d) separating the hydrated crystals of hydrated aluminum chlorosulphate from the mother liquor,(e) heating the separated crystals to a temperature that does not exceed 600.degree. C. to yield a mixture of aluminum sulphates and hydrochloric gases,(f) thermally decomposing the aluminum sulphates to yield alumina of high purity and sulphuric gases,(g) degassing the mother liquor of step (c) to yield HCl gas,(h) concentrating the mother liquor from step (f),(i) freeing the concentrate from impurities, and(j) recycling the mother liquor from step (h) to the attack on the aluminous mineral.

    摘要翻译： 一种通过用硫酸液攻击矿物质从含有杂质的含铝矿物中获得高纯度的氧化铝的方法，并将得到的液体与攻击后残留的残余物分离，（a）将所得液体与含有 HCl和H 2 SO 4，（b）将HCl气体引入到混合物中，（c）冷却步骤（b）的混合物以沉淀出具有式AlSO 4 Cl 6·7H 2 O的水合的氯化硫酸铝晶体，（d）分离水合铝的水合晶体 （e）将分离的晶体加热到不超过600℃的温度以产生硫酸铝和盐酸气体的混合物，（f）热分解硫酸铝以产生高纯度的氧化铝，以及 硫酸气体，（g）脱气步骤（c）的母液以产生HCl气体，（h）浓缩步骤（f）的母液，（i）将浓缩物从杂质中释放，和（j） 将母液从步骤（h）循环到对铝矿的攻击。

    Method of obtaining pure alumina by acid attack on aluminous minerals containing other elements
    5.
    发明授权
    Method of obtaining pure alumina by acid attack on aluminous minerals containing other elements 失效
    通过酸侵蚀获得含有其他元素的含铝矿物的纯氧化铝的方法

    公开(公告)号：US4124680A

    公开(公告)日：1978-11-07

    申请号：US876206

    申请日：1978-02-09

    申请人： Joseph Cohen ,  Alain Adjemian

    发明人： Joseph Cohen ,  Alain Adjemian

    IPC分类号： C01F7/20 ,  C01F7/26 ,  C01F7/56 ,  C01F7/22

    CPC分类号： C01F7/26 ,  C01F7/20

    摘要： A method of obtaining alumina of high purity from aluminous mineral containing impurities in which the mineral is attacked with a sulphuric acid liquor followed by separation of a liquid phase from the resulting solid residue comprising(1) mixing the liquid phase with a liquor containing HCl and H.sub.2 SO.sub.4 at elevated temperature,(2) cooling the mixture with the precipitation of hydrated aluminum chlorosulphate having the formula AlSO.sub.4 Cl.6- 7H.sub. 2 O,(3) separating the precipitate from the remaining liquor which contains the major part of the impurities in solution,(4) suspending the separated precipitate in a hydrochloric acid liquor,(5) chlorinating the suspension by introduction of gaseous HCl with precipitation of AlCl.sub.3.6H.sub. 2 O,(6) separating the precipitated AlCl.sub.3.6H.sub. 2 O, and(7) pyrolizing the separated precipitate to produce alumina of high purity and gaseous HCl.

    摘要翻译： 从含有杂质的含铝矿物中获得高纯度的氧化铝的方法，其中矿物质用硫酸液体侵蚀，然后从所得固体残渣中分离出液相，包括（1）将含有HCl的液体与液相混合， H2SO4在升高的温度下，（2）用具有配方AlSO 4 Cl 6 -7H 2 O的水合氯化铝的沉淀物冷却混合物，（3）将沉淀物与含有溶液中主要部分杂质的剩余液体分离， 4）在氢氯酸液中悬浮分离的沉淀物，（5）用AlCl 3·6H 2 O沉淀引入气相色谱法沉淀悬浮液，（6）分离沉淀的AlCl3·6H2O，（7）将分离的沉淀物 生产高纯度和盐酸的氧化铝。