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    Non-acicular modified high coercivity iron oxides for high density magnetic recording and the processes of making the same
    61.
    发明授权
    Non-acicular modified high coercivity iron oxides for high density magnetic recording and the processes of making the same 失效
    用于高密度磁记录的非针状改性高矫顽磁铁氧化物及其制备方法

    公开(公告)号：US5487954A

    公开(公告)日：1996-01-30

    申请号：US802354

    申请日：1991-12-04

    申请人： Tsung-Shune Chin ,  Ming-Cheng Deng

    发明人： Tsung-Shune Chin ,  Ming-Cheng Deng

    IPC分类号： C01G49/00 ,  C01G49/06 ,  C01G49/08 ,  C01G51/00 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/11 ,  H01F10/10 ,  G11B5/66 ,  C01G49/02 ,  C04B35/00

    CPC分类号： C01G49/06 ,  G11B5/70668 ,  G11B5/70673 ,  C01P2002/52 ,  C01P2006/42 ,  Y10S428/90

    摘要： The non-acicular modified maghemite and magnetite have high coercivity of, for the maghemite, up to 2200 Oe, saturation and residual magnetization of 63-85 emu/g and 43-52 emu/g, respectively; for the magnetite, the corresponding values are 800-1600 Oe, 82-87 emu/g, and 44-51 emu/g, respectively; while retaining same squareness ratio and same chemistry with conventional iron oxides, fine particle size of around 50 nm, easier dispersion and coating, invaried properties after curing, and low value of temperature coefficient of coercivity (0.24-0.37%/.degree. C. for the maghemite and 0.20-0.33%/.degree. C. for the magnetite), have been invented. They are thus especially suitable for high density recording. The modified maghemite and magnetite are prepared by precipitating from aqueous solution containing Fe, Mn, Co and Zn ions at proper ratio using an organic alkali as precipitant, followed by specific heat treatment sequences.

    摘要翻译： 非针状改性磁赤铁矿和磁铁矿对于磁赤铁矿具有高达2200 Oe，饱和和剩余磁化强度分别为63-85 emu / g和43-52 emu / g的矫顽力; 对于磁铁矿，相应的值分别为800-1600 Oe，82-87 emu / g和44-51 emu / g; 同时保持与常规铁氧化物相同的矩形比和相同的化学性质，约50nm的细粒度，易于分散和涂覆，固化后的韧性，以及矫顽力温度系数的低值（0.24-0.37％/℃ 磁赤铁矿和0.20-0.33％/℃的磁铁矿）已被发明。 因此，它们特别适用于高密度记录。 通过使用有机碱作为沉淀剂，以适当的比例从含有Fe，Mn，Co和Zn离子的水溶液中沉淀出改性的磁赤铁矿和磁铁矿，然后进行比热处理。

    Process for reducing sulfur emissions with calcium-containing sorbents
    64.
    发明授权
    Process for reducing sulfur emissions with calcium-containing sorbents 失效
    含钙吸附剂减少硫排放的方法

    公开(公告)号：US5368617A

    公开(公告)日：1994-11-29

    申请号：US876496

    申请日：1992-04-30

    申请人： James K. Kindig

    发明人： James K. Kindig

    IPC分类号： B03B5/30 ,  B03B5/34 ,  B03B5/44 ,  B03B9/00 ,  B03B13/00 ,  C01G49/06 ,  C01G49/08 ,  C10L9/00 ,  C10L5/00 ,  C10L10/00

    CPC分类号： B03B5/447 ,  B03B13/005 ,  B03B5/30 ,  B03B5/34 ,  B03B5/442 ,  B03B9/005 ,  C01G49/06 ,  C01G49/08 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2006/10 ,  Y02P20/129

    摘要： An improved process for reducing sulfur oxide emissions from the combustion of coal is disclosed wherein a fuel mixture comprising calcium-containing sorbent and coal is fed to the burners and sulfur oxides react with calcium from the sorbent in a high temperature sulfur capture region, followed by additional sulfur capture in a lower temperature, high humidity sulfur capture region prior to separation of particulates from the flue gas. Sulfur capture using calcium-containing sorbents can be combined with aggressive coal beneficiation techniques to further enhance reduction of sulfur oxide emissions. The process of the invention provides a process for reducing sulfur oxides that efficiently uses calcium-containing sorbents to enhance sulfur capture while reducing the need for expensive equipment or process modifications.

    摘要翻译： 公开了一种用于减少来自煤的燃烧的硫氧化物排放的改进方法，其中包含含钙吸附剂和煤的燃料混合物被供给到燃烧器中，并且硫氧化物与来自吸附剂的高温硫捕获区域中的钙反应，随后是 在将微粒与烟道气分离之前，在较低温度，高湿度的硫捕集区域内进一步捕获硫。 使用含钙吸附剂进行硫捕获可与积极的选煤技术相结合，进一步增强硫氧化物排放的减少。 本发明的方法提供了一种减少硫氧化物的方法，其有效地使用含钙吸附剂以增强硫捕获同时减少昂贵的设备或工艺改性的需要。

    Apparatus for obtaining ferric oxide and ammonium salts
    69.
    发明授权
    Apparatus for obtaining ferric oxide and ammonium salts 失效
    用于获得氧化铁和铵盐的设备

    公开(公告)号：US5028401A

    公开(公告)日：1991-07-02

    申请号：US235486

    申请日：1988-08-04

    申请人： Luis Escolar ,  Helio Nupieri

    发明人： Luis Escolar ,  Helio Nupieri

    IPC分类号： C01G49/00 ,  C01C1/16 ,  C01C1/22 ,  C01C1/24 ,  C01G49/06 ,  C09C1/24

    CPC分类号： C01C1/24 ,  C01C1/16 ,  C01C1/164 ,  C01C1/22 ,  C01G49/06 ,  C09C1/24 ,  C01P2006/33

    摘要： A vertical cylinder reactor which comprises a plurality of vertically coupled cylindrical modules. An upper end of the reactor, a first module, employs a spraying device for subdividing a liquid reactant into a plurality of small droplets and a toroidal ring for introducing a gas reactant around the liquid phase droplets. A second module connected downstream to the first is provided with a gas inlet jacket for introducing a heating and/or drying gas into the reactor. Connected to the second module is a third module which has a tangential gas inlet for introducing a gas tangentially into the reactor. Finally the reactor is provided with a conical bottom and an outlet conduit for removing gas containing fine solid particles.

    Method of refining ferrous ion-containing acid solution
    70.
    发明授权
    Method of refining ferrous ion-containing acid solution 失效
    精制含亚铁离子的酸溶液的方法

    公开(公告)号：US4889697A

    公开(公告)日：1989-12-26

    申请号：US280378

    申请日：1988-12-05

    申请人： Tsutomu Fukushima ,  Tsugio Nakao ,  Kasane Yamashita ,  Takao Komuro ,  Katsuhiro Nishi

    发明人： Tsutomu Fukushima ,  Tsugio Nakao ,  Kasane Yamashita ,  Takao Komuro ,  Katsuhiro Nishi

    IPC分类号： C01G49/00 ,  C01G49/06 ,  C23G1/36

    CPC分类号： C23G1/36 ,  C01G49/06 ,  C01P2006/80 ,  Y10S423/01 ,  Y10S423/02

    摘要： According to the subject method of refining a ferrous ion-containing acid solution, a metal selected from a group including Al, Cr, V, B, and Zn or an acid solution of that metal is added to a ferrous ion-containing acid solution, such as an acid solution which remains after steel is washed with an acid. The pH value of the acid solution is controlled to be within the range of 3.5 to 6 by adding an alkali liquid to the acid solution, whereby a hydroxide salt of the added metal is produced in the acid solution and the impurities in the acid solution are captured by the produced hydroxide salt. As a result, the impurities can be eliminated from the acid solution such that the Si component (e.g., SiO.sub.2) content in the acid solution is within the range of 2 to 3 ppm or less. Since the content of the other impurities such as Al, Ti, and Cr can also be reduced, a high-purity iron oxide can be obtained from the resultant acid solution.

    摘要翻译： 根据本发明的含有亚铁离子的酸溶液的方法，将含有Al，Cr，V，B和Zn的金属或该金属的酸溶液中的金属加入到含亚铁离子的酸溶液中， 例如在用酸洗涤钢之后残留的酸溶液。 通过向酸性溶液中加入碱液将酸溶液的pH值控制在3.5〜6的范围内，由此在酸溶液中产生添加金属的氢氧化物盐，酸溶液中的杂质为 由产生的氢氧化物盐捕获。 结果，可以从酸溶液中除去杂质，使酸溶液中的Si成分（如SiO 2）含量在2〜3ppm以下的范围内。 由于还可以减少Al，Ti和Cr等其它杂质的含量，所以可以从得到的酸溶液中获得高纯度的氧化铁。