公开(公告)号：US08465723B2

公开(公告)日：2013-06-18

申请号：US12531132

申请日：2008-03-13

申请人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

发明人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

IPC分类号： C01G49/00 ,  C01G49/06

CPC分类号： C01G49/0018 ,  C01G28/02 ,  C01G49/02 ,  C01G49/06 ,  C01P2004/61 ,  C01P2006/12 ,  C22B3/20 ,  C22B3/44 ,  C22B7/006 ,  C22B30/04 ,  Y02P10/234

摘要： Provided is an arsenic-containing solid comprising 100 parts by mass of a scorodite-type iron-arsenic compound and at least 1 part by mass of an iron oxide compound added thereto, in which the scorodite-type iron-arsenic compound is produced by adding an oxidizing agent to an aqueous acidic solution that contains a 5-valent arsenic (V) ion and a 2-valent iron (II) ion, then promoting the precipitation of an iron-arsenic compound with stirring the liquid, and finishing the precipitation thereof within a range where the pH of the liquid is at most 1.2. The iron oxide compound includes goethite, hematite and their mixture, preferably having a BET specific surface area of at least 3 m2/g, more preferably at least 20 m2/g.

摘要翻译： 本发明提供一种含有砷的固体，其含有100质量份的臭葱石型铁砷化合物和至少1质量份的添加了氧化铁的化合物，其中通过添加臭葱石型铁砷化合物 一种含有5价砷（V）离子和2价铁（II）离子的酸性水溶液的氧化剂，然后搅拌该液体促进铁砷化合物的沉淀，并完成其沉淀 在液体的pH为1.2以下的范围内。 氧化铁化合物包括针铁矿，赤铁矿及其混合物，其BET比表面积优选至少为3m 2 / g，更优选至少为20m 2 / g。

公开(公告)号：US07695698B2

公开(公告)日：2010-04-13

申请号：US11605269

申请日：2006-11-29

申请人： Tetsuo Fujita ,  Ryoichi Taguchi

发明人： Tetsuo Fujita ,  Ryoichi Taguchi

IPC分类号： C01G28/00 ,  C01G49/00

CPC分类号： C01G28/00 ,  C01G49/0018 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C22B3/44 ,  C22B7/006 ,  C22B30/04 ,  Y02P10/234

摘要： A method of producing an iron-arsenic compound by adding an oxidizing agent to an aqueous solution containing arsenic ions and bivalent iron ions and allowing an iron-arsenic compound precipitation reaction to proceed under stirring of the solution, wherein the precipitation reaction is terminated at a solution pH in the range of 0 to 1. When the arsenic concentration of the pre-reaction solution is 25 g/L or greater, the reaction can be terminated at a solution pH in the range of −0.45 to 1.2. The pH of the pre-reaction solution is preferably greater than 0 and not greater than 2.0. A ferrous sulfate is can be used as the source of the bivalent iron ions. Even when some amount of impurity elements is present in the arsenic-containing solution, the method is nevertheless capable of forming a scorodite compound excellent in crystallinity in the form of a compact compound barely swollen by moisture and the like, i.e., a niron-arsenic compound excellent in filterability.

摘要翻译： 通过在含有砷离子和二价铁离子的水溶液中添加氧化剂并在溶液搅拌下进行铁砷化合物沉淀反应来制造铁砷化合物的方法，其中沉淀反应终止于 溶液pH范围为0〜1。当预反应溶液的砷浓度为25g / L以上时，可以在-0.45〜1.2的溶液pH范围内终止反应。 预反应溶液的pH优选大于0且不大于2.0。 硫酸亚铁可用作二价铁离子的来源。 即使在含砷溶液中存在一定量的杂质元素，仍然能够形成结晶度优异的微细化合物，其形式为几乎不被水分等溶胀的致密化合物，即硝酸铁 复合优异的过滤性。

公开(公告)号：US20090291307A1

公开(公告)日：2009-11-26

申请号：US12375075

申请日：2007-07-17

申请人： Tetsuo Fujita ,  Ryoichi Taguchi

发明人： Tetsuo Fujita ,  Ryoichi Taguchi

IPC分类号： B32B1/00

CPC分类号： C01G49/0018 ,  C01G28/02 ,  C01G49/00 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/80 ,  Y10T428/2982

摘要： There is provided an iron arsenate powder which is produced from an arsenic containing solution and wherein the concentration of arsenic eluted or released from the powder is very low. The iron arsenate powder is a powder of dihydrate of iron arsenate, which has a mean particle diameter of not smaller than 8 micrometers, preferably not smaller than 10 micrometers, and a BET specific surface area of not greater than 2 m2/g, preferably not greater than 0.5 m2/g, and wherein the percentage of particles having particle diameters of not greater than 5 micrometers of the powder is not greater than 10%, preferably not greater than 5%. The amount of each of calcium and magnesium contained as impurities in the iron arsenate powder is preferably not greater than 2% by weight.

摘要翻译： 提供了由含砷溶液制备的砷酸铁粉末，其中从粉末中洗脱或释放的砷的浓度非常低。 砷酸铁粉末是砷酸铁的二水合物的粉末，其平均粒径不小于8微米，优选不小于10微米，BET比表面积不大于2m 2 / g，优选不为 大于0.5m 2 / g，并且其中粉末粒径不大于5微米的颗粒的百分比不大于10％，优选不大于5％。 砷酸铁粉末中作为杂质而含有的钙和镁的量优选为2重量％以下。

公开(公告)号：US20080075644A1

公开(公告)日：2008-03-27

申请号：US11605269

申请日：2006-11-29

申请人： Tetsuo Fujita ,  Ryoichi Taguchi

发明人： Tetsuo Fujita ,  Ryoichi Taguchi

IPC分类号： C01G28/00

CPC分类号： C01G28/00 ,  C01G49/0018 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C22B3/44 ,  C22B7/006 ,  C22B30/04 ,  Y02P10/234

摘要： A method of producing an iron-arsenic compound by adding an oxidizing agent to an aqueous solution containing arsenic ions and bivalent iron ions and allowing an iron-arsenic compound precipitation reaction to proceed under stirring of the solution, wherein the precipitation reaction is terminated at a solution pH in the range of 0 to 1. When the arsenic concentration of the pre-reaction solution is 25 g/L or greater, the reaction can be terminated at a solution pH in the range of −0.45 to 1.2. The pH of the pre-reaction solution is preferably greater than 0 and not greater than 2.0. A ferrous sulfate is can be used as the source of the bivalent iron ions. Even when some amount of impurity elements is present in the arsenic-containing solution, the method is nevertheless capable of forming a scorodite compound excellent in crystallinity in the form of a compact compound barely swollen by moisture and the like, i.e., a niron-arsenic compound excellent in filterability.

摘要翻译： 通过在含有砷离子和二价铁离子的水溶液中添加氧化剂并在溶液搅拌下进行铁砷化合物沉淀反应来制造铁砷化合物的方法，其中沉淀反应终止于 溶液pH范围为0〜1。当预反应溶液的砷浓度为25g / L以上时，可以在-0.45〜1.2的溶液pH范围内终止反应。 预反应溶液的pH优选大于0且不大于2.0。 硫酸亚铁可用作二价铁离子的来源。 即使在含砷溶液中存在一定量的杂质元素的情况下，仍然能够形成结晶度优异的微细化合物，其形式为几乎不被水分等溶胀的致密化合物形式，即硝酸铁 复合优异的过滤性。

公开(公告)号：US20070253877A1

公开(公告)日：2007-11-01

申请号：US11605866

申请日：2006-11-28

申请人： Tetsuo Fujita ,  Ryoichi Taguchi

发明人： Tetsuo Fujita ,  Ryoichi Taguchi

IPC分类号： C01G28/00

CPC分类号： C01G28/00 ,  C01G49/00 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C22B3/12 ,  C22B3/44 ,  C22B7/008 ,  C22B30/04 ,  Y02P10/234

摘要： There is provided a method for recovering a powder of a compound of iron and arsenic, which has a very low concentration of arsenic eluted from the powder, by treating an arsenic containing solution, e.g., a high purity and high concentration arsenic containing solution obtained by treating an arsenic containing substance which contains various elements other than arsenic, such as an intermediate product in a non-ferrous metal smelting or refining process. Ferrous ions are added to an arsenic containing solution, which contains 10 g/L or more of arsenic, so as to cause the ratio (Fe/As) of iron to arsenic in the solution to be not less than 1, and an oxidizing agent is added to the solution to allow a reaction at a temperature of not lower than 70° C. while stirring the solution. Then, a solid-liquid separation is carried out, and a solid part separated by the solid-liquid separation is dried.

摘要翻译： 提供了一种通过处理含砷溶液，例如通过以下方法获得的高纯度和高浓度含砷溶液来回收由粉末溶出的砷的浓度非常低的铁和砷的化合物的粉末的方法： 处理含有砷以外的各种元素的含砷物质，例如在有色金属冶炼或精炼过程中的中间产物。 将含亚铁离子加入到含有10g / L以上的砷的含砷溶液中，使得溶液中铁与砷的比例（Fe / As）为1以上，氧化剂 加入到溶液中以允许在不低于70℃的温度下进行反应，同时搅拌溶液。 然后，进行固液分离，将通过固液分离分离的固体部分干燥。

公开(公告)号：US20100044631A1

公开(公告)日：2010-02-25

申请号：US12531132

申请日：2008-03-13

申请人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

发明人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

IPC分类号： C09K3/00

CPC分类号： C01G49/0018 ,  C01G28/02 ,  C01G49/02 ,  C01G49/06 ,  C01P2004/61 ,  C01P2006/12 ,  C22B3/20 ,  C22B3/44 ,  C22B7/006 ,  C22B30/04 ,  Y02P10/234

摘要： Provided is an arsenic-containing solid comprising 100 parts by mass of a scorodite-type iron-arsenic compound and at least 1 part by mass of an iron oxide compound added thereto, in which the scorodite-type iron-arsenic compound is produced by adding an oxidizing agent to an aqueous acidic solution that contains a 5-valent arsenic (V) ion and a 2-valent iron (II) ion, then promoting the precipitation of an iron-arsenic compound with stirring the liquid, and finishing the precipitation thereof within a range where the pH of the liquid is at most 1.2. The iron oxide compound includes goethite, hematite and their mixture, preferably having a BET specific surface area of at least 3 m2/g, more preferably at least 20 m2/g.

摘要翻译： 本发明提供一种含有砷的固体，其含有100质量份的臭葱石型铁砷化合物和至少1质量份的添加了氧化铁的化合物，其中通过添加臭葱石型铁砷化合物 一种含有5价砷（V）离子和2价铁（II）离子的酸性水溶液的氧化剂，然后搅拌该液体促进铁砷化合物的沉淀，并完成其沉淀 在液体的pH为1.2以下的范围内。 氧化铁化合物包括针铁矿，赤铁矿及其混合物，其BET比表面积优选至少为3m 2 / g，更优选至少为20m 2 / g。

公开(公告)号：US20100140179A1

公开(公告)日：2010-06-10

申请号：US12450579

申请日：2008-03-26

申请人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

发明人： Tetsuo Fujita ,  Ryoichi Taguchi ,  Hisashi Kubo

IPC分类号： C02F1/42 ,  C01G49/02 ,  C02F101/20 ,  C02F101/14

CPC分类号： C01G49/02 ,  B01J20/0229 ,  B01J20/06 ,  B01J20/28004 ,  B01J20/28059 ,  B01J20/2808 ,  B01J20/28083 ,  C01P2004/04 ,  C01P2006/12 ,  C01P2006/16 ,  C02F1/281 ,  C02F2101/103 ,  C02F2101/106 ,  C02F2101/14 ,  C02F2101/20 ,  C02F2303/16 ,  Y10T428/2982

摘要： To provide a recovery agent for recovering arsenic, fluorine, lead, and selenium from a solution containing environmentally hazardous substances including arsenic and fluorine. A porous iron oxide having a particle size of 10 to 100 μm and a specific surface area of 50 m2/g or larger determined by three-point BET method is introduced into a solution containing the environmentally hazardous substances. Alternatively, a solution containing the environmentally hazardous substances is passed through a column filled with the porous iron oxide. Thus, the environmentally hazardous substances are recovered from the solution.

摘要翻译： 提供从含有砷和氟的有害环境物质的溶液中回收砷，氟，铅和硒的回收剂。 将通过三点BET法测定的粒径为10〜100μm，比表面积为50m 2 / g以上的多孔氧化铁引入含有环境有害物质的溶液中。 或者，将含有环境有害物质的溶液通过填充有多孔氧化铁的柱。 因此，从溶液中回收有害环境的物质。