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915 条记录 (耗时 0.02 秒)

    Method for producing high brightness low abrasion calcined kaolin pigment
    86.
    发明授权
    Method for producing high brightness low abrasion calcined kaolin pigment 失效
    高亮度低磨耗煅烧高岭土颜料的制造方法

    公开(公告)号：US5522924A

    公开(公告)日：1996-06-04

    申请号：US405610

    申请日：1995-03-17

    申请人： Randolph O. Smith ,  William H. Pope

    发明人： Randolph O. Smith ,  William H. Pope

    IPC分类号： B03B9/00 ,  C09C1/42 ,  C04B33/04

    CPC分类号： C09C1/42 ,  B03B9/00 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/80 ,  C01P2006/82 ,  C01P2006/90

    摘要： A process for preparing a high brightness, low abrasion calcined kaolin. A cretaceous crude is wet beneficiated by subjecting same as an aqueous slurry to degritting, classification, magnetic separation, and scrub grinding. The slurry from the foregoing is diluted to less than 15% solids and subjected while well dispersed to a separation in a centrifuge to yield an underflow and an overflow fine fraction having less than 5% solids and a P.S.D. such that at least 85% by weight are of

    摘要翻译： 制备高亮度低磨耗煅烧高岭土的方法。 通过对含水浆料进行脱灰，分级，磁分离和擦洗研磨，使白垩纪粗品湿化。 将来自上述物质的浆液稀释至小于15％的固体，并在良好分散以在离心机中分离以产生底流和具有小于5％固体含量和P.S.D的上溢精细级分。 使得至少85重量％为<0.5μmE.S.D。 并且至少30重量％为<0.25μmE.S.D. 将分散的高岭土的溢流精细级分浆料经过部分过滤，通过与基本上没有悬浮高岭土颗粒通过的微孔膜交叉流动，将所述浆料的固体含量提高至至少20％ 。 该浆液以干重为基准，以细粒度的三级高岭土的浆料为基准组合，然后漂白，絮凝和过滤，得到滤饼，将其重新分散，干燥并研磨，得到煅烧炉 饲料。 进料在高于高岭土放热的温度下煅烧，得到亮度至少为92并且Einleiner Abrasion小于24的煅烧产品。

    Process to reclaim UO.sub.2 scrap powder
    87.
    发明授权
    Process to reclaim UO.sub.2 scrap powder 失效
    回收UO2废粉的工艺

    公开(公告)号：US5514306A

    公开(公告)日：1996-05-07

    申请号：US11561

    申请日：1993-02-01

    申请人： Richard I. Larson ,  Thomas J. Flaherty, III ,  William R. Becker ,  Michael R. Chilton

    发明人： Richard I. Larson ,  Thomas J. Flaherty, III ,  William R. Becker ,  Michael R. Chilton

    IPC分类号： C01G56/00 ,  C01G43/025 ,  G21C3/62 ,  G21C21/02 ,  G01C21/00

    CPC分类号： C01G43/025 ,  C01P2004/80 ,  C01P2006/10 ,  C01P2006/14 ,  C01P2006/82

    摘要： A process for reclaiming scrap UO.sub.2 materials yields a high-sinter-density pellet. The scrap is oxidized in a high-temperature furnace to produce U.sub.3 O.sub.8. The U.sub.3 O.sub.8 particles from the oxidation furnace are reacted with nitric acid to produce a solution of uranyl nitrate that meets the concentration and free acid requirements of the ADU precipitation process. A controlled two-stage ADU precipitation process is carried out to produce ADU particles with a size and morphology that leads to high-surface-area UO.sub.2 powder with excellent sintered pellet ceramic characteristics. After calcination and hydrogen reduction to UO.sub.2, the high-surface-area UO.sub.2 powder is passivated.

    摘要翻译： 回收废旧UO2材料的方法产生高烧结密度的颗粒。 废料在高温炉中氧化生成U3O8。 来自氧化炉的U3O8颗粒与硝酸反应，产生满足ADU沉淀过程浓度和游离酸需求的硝酸铀酰溶液。 进行受控的两级ADU沉淀工艺，生产具有优异烧结颗粒陶瓷特性的高表面积UO2粉末的尺寸和形态的ADU颗粒。 在煅烧和氢还原成UO2之后，高表面积的UO2粉末被钝化。

    Process of producing solid sodium cyanide
    88.
    发明授权
    Process of producing solid sodium cyanide 失效
    生产固体氰化钠的方法

    公开(公告)号：US5383940A

    公开(公告)日：1995-01-24

    申请号：US155781

    申请日：1993-11-23

    申请人： Reinhard Bober ,  Walter Spielmann

    发明人： Reinhard Bober ,  Walter Spielmann

    IPC分类号： C01C3/10 ,  C22B1/14

    CPC分类号： C01C3/10 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/82

    摘要： Invention relates to a process of producing solid sodium cyanide. The process according to the invention is characterized in that an aqueous sodium cyanide solution (1) of 30 to 45% by mass, containing up to 5% by mass solids, is granulated in two process steps in counterflow with heated air, wherein in the first process step a fluidized bed is produced in a fluidized bed granulator (4) by means of hot air (5) from the second process step, in so doing the air being cooled down to a temperature of 60.degree. to 90.degree. C. a sodium cyanide granulate of 2 to 6 mm being set in a classifying discharge duct (16) and the same being dried to a residual moisture of 1.5 to 4% by mass, wherein in the second process step in a further fluidized bed of a drier (14) the granulate produced is dried through an air current (25) with initial temperatures of 150.degree. to 230.degree. C. to a residual moisture settable at liberty of less than 1.5% by mass and is removed by way of a cellular wheel (20 ).

    摘要翻译： 本发明涉及一种生产固体氰化钠的方法。 根据本发明的方法的特征在于，含有至多5质量％固体的含量为30至45质量％的氰化钠水溶液（1）在与加热的空气逆流的两个工艺步骤中造粒，其中在 第一工艺步骤通过来自第二工艺步骤的热空气（5）在流化床造粒机（4）中产生流化床，使空气冷却至60℃至90℃的温度。 将2〜6毫米的氰化钠颗粒置于分级排放管道（16）中，并将其干燥至1.5至4质量％的残余水分，其中在第二工艺步骤中，在干燥器的另一流化床 14）将生产的颗粒通过初始温度为150℃至230℃的气流（25）干燥至残留水分，其自由度小于1.5质量％，并通过蜂窝轮（20 ）。

    Precipitated silica particulates having controlled porosity
    89.
    发明授权
    Precipitated silica particulates having controlled porosity 失效
    具有受控孔隙率的沉淀二氧化硅微粒

    公开(公告)号：US5342598A

    公开(公告)日：1994-08-30

    申请号：US826217

    申请日：1992-01-24

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： C01B33/18 ,  C01B33/187 ,  C01B33/193 ,  C01B33/12

    CPC分类号： C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/19 ,  C01P2006/82 ,  C01P2006/90

    摘要： Precipitated silica particulates having a BET specific surface ranging from 20 to 300 m.sup.2 /g, a CTAB specific surface ranging from 10 to 200 m.sup.2 /g, an oil uptake (DBP) ranging from 80 to 400 cm.sup.3 /100 g, a pore volume ranging from 1 to 10 cm.sup.3 /g and a mean pore diameter ranging from 10 to 50 nm, well adapted for such applications as the coating of paper and catalysis, are prepared by (a) simultaneously introducing a silicate and an acid into a dispersion of colloidal silica, thereby providing a silica suspension, (b) next decreasing the pH of such suspension to a value ranging from 3 to 7, and (c) then separating the silica particulates from the final suspension and drying them.

    摘要翻译： BET比表面积为20〜300m2 / g，CTAB比表面积为10〜200m2 / g，油吸收量（DBP）为80〜400cm 3 / 100g，孔体积范围的沉淀二氧化硅微粒 通过（a）同时将硅酸盐和酸引入胶体分散体中制备，适用于诸如纸和催化涂层的应用，其范围为10至50nm，平均孔径为10至50nm。 二氧化硅，从而提供二氧化硅悬浮液，（b）接着将这种悬浮液的pH降低至3至7的值，和（c）然后将二氧化硅微粒与最终的悬浮液分离并干燥。