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    Recovery of sodium hydroxide and aluminum hydroxide from etching waste
    5.
    发明授权
    Recovery of sodium hydroxide and aluminum hydroxide from etching waste 失效
    从腐蚀废物中回收氢氧化钠和氢氧化铝

    公开(公告)号：US5049233A

    公开(公告)日：1991-09-17

    申请号：US519396

    申请日：1990-07-06

    申请人： Thomas A. Davis

    发明人： Thomas A. Davis

    IPC分类号： C01D1/38 ,  C01F7/14 ,  C23F1/46

    CPC分类号： C01F7/14 ,  C01D1/38 ,  C23F1/46

    摘要： A method for the recovery and recycling of sodium hydroxide from the waste solution of aluminum etching operations. The method utilizes a dialysis membrane column or stack to initially remove sodium hydroxide from the waste solution and return it to the etch tank base solution sufficiently concentrated to carry on the basic etching operation. The method permits the recovery of salable quantities of aluminum hydroxide.

    摘要翻译： 从铝蚀刻操作的废溶液中回收和再循环氢氧化钠的方法。 该方法利用透析膜柱或叠层来首先从废溶液中除去氢氧化钠并将其返回到足够浓缩的蚀刻槽底溶液中以进行基本蚀刻操作。 该方法允许回收可销售量的氢氧化铝。

    PROCESS FOR COMPLEX PROCESSING OF BAUXITE
    7.
    发明申请
    PROCESS FOR COMPLEX PROCESSING OF BAUXITE 有权
    宝石复合加工工艺

    公开(公告)号：US20160186289A1

    公开(公告)日：2016-06-30

    申请号：US14582768

    申请日：2014-12-24

    申请人： PLEASON VENTURES LTD

    发明人： Alexander WELTER

    IPC分类号： C22B3/44 ,  C22B21/04

    CPC分类号： C22B3/44 ,  C01F7/04 ,  C01F7/14 ,  C01F7/46 ,  C01G49/02 ,  C01P2006/80 ,  C22B1/00 ,  C22B3/00 ,  C22B21/0007 ,  C22B21/04

    摘要： Method for processing bauxite, including grinding the bauxite and extracting iron; separating the resulting pulp into a solid phase and a liquid phase; extracting aluminium from the liquid phase at a pH of about 7 to 8 to form a precipitate of sodium hydrogen carboaluminate; separating the precipitate of sodium hydrogen carboaluminate from the neutralized pulp; extracting iron from the neutralized liquid phase at a pH of at least about 12 using to form a precipitate of iron hydroxide; separating the precipitate of iron hydroxide from the basic pulp to form an iron ore concentrate and a mother liquor chelate; concentrating the mother liquor chelate using evaporation; cooling the concentrated solution; carbonizing the cooled solution with gaseous carbon dioxide under pressure to crystallize sodium hydrogen carbonate; and separating the crystallized sodium hydrogen carbonate from the carbonized solution to form a chelate liquid phase and a sodium hydrogen carbonate solid phase.

    摘要翻译： 铝土矿处理方法，包括研磨铝土矿和提取铁; 将所得纸浆分离成固相和液相; 在约7至8的pH下从液相中提取铝以形成碳酸氢钠的沉淀; 从中和的纸浆中分离碳酸氢钠的沉淀物; 在至少约12的pH下从中和液相中提取铁，以形成氢氧化铁沉淀物; 从碱性纸浆中分离出氢氧化铁沉淀物，形成铁精矿和母液螯合物; 用蒸发浓缩母液螯合物; 冷却浓缩液; 在压力下用气态二氧化碳对冷却的溶液进行碳化以使碳酸氢钠结晶; 从碳酸化溶液中分离结晶的碳酸氢钠，形成螯合液相和碳酸氢钠固相。

    ALUMINA PRODUCTION PROCESS
    8.
    发明申请
    ALUMINA PRODUCTION PROCESS 审中-公开
    氧化铝生产工艺

    公开(公告)号：US20120003130A1

    公开(公告)日：2012-01-05

    申请号：US12863916

    申请日：2008-01-22

    申请人： Giorgio Vidili

    发明人： Giorgio Vidili

    IPC分类号： C01F7/02

    CPC分类号： C01F7/0613 ,  C01F7/14 ,  C01P2006/22

    摘要： An improved process for producing alumina from bauxite is disclosed comprising the steps of: a) wet grinding of the bauxite in the presence of an agent capable of reducing the viscosity of the semiliquid paste obtained; b) caustic etching of the bauxite ground in step a) with a concentrated solution of sodium hydroxide until a liquid phase is obtained comprising aluminium hydroxide and a solid phase; c) removal of the solid phase formed in step b) from the liquid phase; d) precipitation of the aluminium hydroxide from the liquid phase of step c); e) filtration of the aluminium hydroxide precipitated in step d); and f) calcination of the aluminium hydroxide of step e).

    摘要翻译： 公开了一种用于从铝土矿生产氧化铝的改进方法，包括以下步骤：a）在能够降低所获得的半液态糊料的粘度的试剂存在下，对铝土矿进行湿法研磨; b）在步骤a）中用浓氢氧化钠溶液苛化蚀刻铝土矿，直至得到包含氢氧化铝和固相的液相; c）从液相中除去步骤b）中形成的固相; d）从步骤c）的液相中沉淀出氢氧化铝; e）过滤步骤d）中沉淀的氢氧化铝; 和f）煅烧步骤e）的氢氧化铝。

    Aluminum hydroxide aggregated particles producing vessel
    9.
    发明授权
    Aluminum hydroxide aggregated particles producing vessel 失效
    氢氧化铝凝集颗粒生产容器

    公开(公告)号：US07704465B2

    公开(公告)日：2010-04-27

    申请号：US10289429

    申请日：2002-11-07

    申请人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

    发明人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

    IPC分类号： B01J19/18

    CPC分类号： B01F7/00208 ,  B01F7/00641 ,  B01F7/1675 ,  B01F7/22 ,  B01F15/00837 ,  B01F2215/0431 ,  B01F2215/044 ,  B01F2215/0472 ,  B01F2215/0477 ,  B01J19/006 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00768 ,  C01F7/02 ,  C01F7/14 ,  C01F7/144 ,  C01F7/147 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/60 ,  C09C1/407 ,  Y10T428/2982

    摘要： Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 μm, an average particle diameter as determined after pressing at 1,000 kg/cm2 of not more than 35 μm, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.

    摘要翻译： 平均粒径为40μm以上的氢氧化铝凝集粒子，1000kg / cm 2以上压制后测定的平均粒径为35μm以下，通过将20ml甘油 和10g不超过69的氢氧化铝凝集颗粒，通过包括以下步骤的方法获得：（a）将过饱和的铝酸钠水溶液进料到容器中，（b）将氢氧化铝种子加入到过饱和水溶液 铝酸钠溶液，（c）在容器中搅拌添加种子的溶液，同时连续向容器中加入过饱和的铝酸钠水溶液以水解过饱和的铝酸钠水溶液，（d）将氢氧化铝凝集颗粒与水溶液 铝酸钠溶液，和（e）将铝酸钠水溶液连续排出容器。