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14 条记录 (耗时 0.026 秒)

    Recovery of alumina values from alunite ore
    1.
    发明授权
    Recovery of alumina values from alunite ore 失效
    从铝酸钙矿石回收氧化铝值

    公开(公告)号：US4618480A

    公开(公告)日：1986-10-21

    申请号：US641020

    申请日：1984-08-15

    申请人： Wayne W. Hazen ,  David L. Thompson ,  James E. Reynolds ,  Nicholas J. Lombardo ,  Paul B. Queneau ,  John P. Hager

    发明人： Wayne W. Hazen ,  David L. Thompson ,  James E. Reynolds ,  Nicholas J. Lombardo ,  Paul B. Queneau ,  John P. Hager

    IPC分类号： C01D5/00 ,  C01F7/06 ,  C01F7/47

    CPC分类号： C01F7/0686 ,  C01D5/008 ,  C01F7/47

    摘要： A novel process for the recovery of alumina and potassium sulfate from alunite is provided comprising leaching the alunite with potassium hydroxide to which no sodium materials have been added, said leach solution being saturated with potassium sulfate. Aluminum values are solubilized into the leachate, and potassium and sulfur values are rendered soluble, but remain in the residue. The leachate is desilicated if necessary, preferably with lime, and aluminum trihydroxide is precipitated therefrom, followed by calcining to alumina product. The residue is leached to solubilize potassium sulfate in a secondary leach and the potassium sulfate product crystallized therefrom. Potassium hydroxide is regenerated from a portion of the potassium sulfate secondary leachate by several methods.Novel procedures for regenerating alkali metal hydroxides from the corresponding sulfates are also provided including routes involving formates and carbonates as intermediates and pyrohydrolysis.

    摘要翻译： 提供了一种从铝酸钠中回收氧化铝和硫酸钾的新方法，包括用不含钠物质的氢氧化钾浸出铝酸钠，所​​述浸出溶液用硫酸钾饱和。 铝的值被溶解到浸出液中，钾和硫的值变得可溶，但残留在残留物中。 必要时，优选用石灰将渗滤液脱气，并从其中沉淀出氢氧化铝，然后煅烧成氧化铝产品。 将残余物浸出以在二次浸出中溶解硫酸钾，并从其中结晶出硫酸钾产物。 通过几种方法从一部分硫酸钾二次浸出液中再生氢氧化钾。 还提供了从相应的硫酸盐再生碱金属氢氧化物的新方法，包括涉及甲酸盐和碳酸盐作为中间体和热解水解的途径。

    Method for reducing lead leaching in fixtures
    2.
    发明授权
    Method for reducing lead leaching in fixtures 失效
    减少固定装置铅浸的方法

    公开(公告)号：US5904783A

    公开(公告)日：1999-05-18

    申请号：US936264

    申请日：1997-09-24

    申请人： John P. Hager ,  Jerome P. Downey

    发明人： John P. Hager ,  Jerome P. Downey

    IPC分类号： C23F1/00 ,  C23F1/10 ,  C22B3/06

    CPC分类号： C23F1/10 ,  C23F1/00

    摘要： A method for treating a brass fixture having a fluid-contacting surface with lead dispersoids exposed thereon to reduce lead leaching into a fluid supply by contacting the brass fixture with a liquid metal solution selected from the group consisting of a liquid sodium solution, a liquid potassium solution and a liquid metal alloy solution to dissolve lead dispersoids from the fixture, wherein the metal alloy comprises a metal selected from the group consisting of sodium and potassium.

    摘要翻译： 一种用于处理具有暴露于其上的铅分散体的流体接触表面的黄铜固定装置的方法，以通过使黄铜固定装置与液态金属溶液接触来减少铅浸出到液体供应源中，所述液态金属溶液选自液体钠溶液，液体钾 溶液和液态金属合金溶液以溶解来自夹具的铅分散体，其中该金属合金包含选自钠和钾的金属。

    Treatment of indium dusts
    3.
    发明授权
    Treatment of indium dusts 失效
    铟灰处理

    公开(公告)号：US5108497A

    公开(公告)日：1992-04-28

    申请号：US578013

    申请日：1990-09-05

    申请人： Nicholas B. Gomez ,  John P. Hager ,  Charles E. T. White ,  Laurence G. Stevens

    发明人： Nicholas B. Gomez ,  John P. Hager ,  Charles E. T. White ,  Laurence G. Stevens

    IPC分类号： C22B7/02 ,  C22B58/00

    CPC分类号： C22B58/00 ,  C22B7/02 ,  Y02P10/212 ,  Y10S75/961

    摘要： Indium-containing feedstocks, such as flue dusts from a refining or smelting process, are treated to increase the concentration of indium and at the same time to reduce the concentrations of lead, copper, and arsenic. The flue dusts are treated in a sodium-doped lead bath at temperatures of 675.degree. to 800.degree. C. Soda ash in the amount of 15 to 35 weight percent is blended with the feed stock and added to the sodium-doped lead bullion. The sodium reacts with the dusts to form a liquid dross, which is removed, cooled, and crushed. The powdered dross is water leached to remove the sodium salts. The indium remains in the filler cake and can be processed by conventional methods for the recovery of indium. About 95% of the indium reports to the filter cake, while lead retention in the filter cake is only about 5-15% of the initial lead content in the dust. A majority of the zinc also reports to the filter cake. A majority of the lead, copper, and silver report to the bullion, and a majority of the arsenic reports to the filtrate. Sodium consumption is about one pound of sodium for each five to ten pounds of feedstock.

    摘要翻译： 处理含铟原料，例如来自精炼或熔炼过程的烟道灰，以增加铟的浓度，同时降低铅，铜和砷的浓度。 烟道灰尘在钠掺杂铅浴中在675℃至800℃的温度下处理。以15-35重量％的量将纯碱与原料混合并加入到钠掺杂的铅块中。 钠与粉尘反应形成液体渣，将其除去，冷却并粉碎。 粉状浮渣是水淋洗以除去钠盐。 铟保留在填料块中，并且可以通过用于回收铟的常规方法进行处理。 铟的约95％报告在滤饼中，而滤饼中的铅保留量仅为灰尘初始含铅量的约5-15％。 大多数锌还报告过滤饼。 大多数铅，铜和银向金块报告，大多数砷报告给滤液。 每5至10磅原料，钠消耗量约为1磅。

    Process for the production of iron carbide from iron oxide using external sources of carbon monoxide
    10.
    发明授权
    Process for the production of iron carbide from iron oxide using external sources of carbon monoxide 失效
    使用外来的一氧化碳从氧化铁生产碳化铁的方法

    公开(公告)号：US06428763B1

    公开(公告)日：2002-08-06

    申请号：US09532583

    申请日：2000-03-22

    申请人： Frank M. Stephens, Jr. ,  Frank A. Stephens ,  Robert F. Hogsett ,  John P. Hager

    发明人： Frank M. Stephens, Jr. ,  Frank A. Stephens ,  Robert F. Hogsett ,  John P. Hager

    IPC分类号： C01B3130

    CPC分类号： C01B32/914

    摘要： The present invention is a process for the rapid conversion of iron oxide-containing material into iron carbide. The process includes a first step in which the iron oxide-containing material is contacted with a reducing gas that contains a high concentration of hydrogen gas to form a metallic iron-containing intermediate product and a second step in which the metallic iron-containing product is contacted with a carburizing gas having high concentrations of hydrogen and carbon monoxide gas to produce iron carbide. The unused carbon monoxide in the off-gas from the second step is not recycled to the second step but is used as a fuel source.

    摘要翻译： 本发明是将含氧化铁的材料快速转化成碳化铁的方法。 该方法包括第一步骤，其中使含氧化铁的材料与含有高浓度氢气的还原气体接触以形成含金属铁的中间产物，第二步是将金属含铁产物 与具有高浓度氢气和一氧化碳气体的渗碳气体接触以产生碳化铁。 来自第二步骤的废气中的未使用的一氧化碳不被再循环到第二步，而是用作燃料源。