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    High solids aqueous silica slurry
    1.
    发明授权
    High solids aqueous silica slurry 失效
    高固体含水二氧化硅浆液

    公开(公告)号：US5030286A

    公开(公告)日：1991-07-09

    申请号：US396402

    申请日：1989-08-14

    申请人： Roger A. Crawford ,  Thomas G. Krivak ,  Patrick G. Malloy ,  Da-Hung Yang

    发明人： Roger A. Crawford ,  Thomas G. Krivak ,  Patrick G. Malloy ,  Da-Hung Yang

    IPC分类号： C01B33/14 ,  C01B33/141 ,  C01B33/187 ,  C08K3/36 ,  C08L33/04 ,  C08L33/06 ,  D21H19/40

    CPC分类号： C01B33/1417 ,  D21H19/40 ,  Y10S423/15

    摘要： Described are high solids aqueous slurries of amorphous precipitated hydrated silica, which slurries are of relatively low viscosity. The slurry typically contains from about 40 to about 60 weight percent of hydrated precipitated high structure silica. The viscosity of the high solids slurry is less than about 1000 centipoises. Processes for producing the aqueous high solids silica slurry are disclosed. In one embodiment, a wet cake of amorphous precipitated hydrated silica is liquified and the liquified wet cake charged to a high intensity mill wherein the silica is wet milled until the median agglomerate particle size of the silica is between about 0.3 and about 3 microns. In a further embodiment, finely-divided dry amorphous precipitated silica is slurried in a dispersion mill to the desired solids level and this slurry charged to a high-intensity mill and wet milled therein until the aforesaid agglomerate particle size range is attained. The resulting high solids slurry can be shipped in bulk with only mild agitation to prevent setting. A dispersant may also be added to the slurry prior to milling to retard settling of the silica.

    摘要翻译： 描述了无定形沉淀的水合二氧化硅的高固体含水浆料，其中浆料的粘度相对较低。 浆料通常含有约40至约60重量％的水合沉淀高结构二氧化硅。 高固体浆料的粘度小于约1000厘泊。 公开了用于生产含水高固体二氧化硅浆料的方法。 在一个实施方案中，将无定形沉淀的水合二氧化硅的湿滤饼液化并将液化的湿滤饼装入高强度研磨机中，其中二氧化硅被湿磨，直到二氧化硅的中值附聚物粒度在约0.3至约3微米之间。 在另一个实施方案中，将细碎的干无定形沉淀二氧化硅在分散研磨机中浆化至所需的固体含量，并将该浆料装入高强度研磨机中并在其中湿磨，直到达到上述附聚物粒度范围。 所得到的高固体浆料可以散装运输，只需轻微的搅拌即可防止固化。 在研磨之前还可以将分散剂加入到浆料中以阻止二氧化硅沉降。

    Precipitated silica having high sodium sulfate content
    3.
    发明授权
    Precipitated silica having high sodium sulfate content 失效
    具有高硫酸钠含量的沉淀二氧化硅

    公开(公告)号：US5605569A

    公开(公告)日：1997-02-25

    申请号：US555552

    申请日：1995-11-08

    申请人： James L. Boyer ,  Thomas G. Krivak ,  Harold E. Swift ,  Robert C. Wang

    发明人： James L. Boyer ,  Thomas G. Krivak ,  Harold E. Swift ,  Robert C. Wang

    IPC分类号： H01M2/16 ,  H01M10/10 ,  C04B14/04 ,  C01B33/12

    CPC分类号： H01M2/1653 ,  H01M10/10 ,  Y02P70/54

    摘要： Particles comprising particulate amorphous precipitated silica in association with from 5 to 10 percent by weight sodium sulfate and less than 10 percent by weight water, wherein the percentages are based on the weight of the silica, the sodium sulfate, and the water, which particles have a BET surface area of from 100 to 300 m.sup.2 /g, a total intruded volume from 1.8 to 3.6 cm.sup.3 /g, and a DBP oil absorption of from 180 to 320 cm.sup.3 /100 g, may be employed in microporous battery separators to introduce all or a portion of the desired sodium sulfate to the battery electrolyte. Moreover the enhanced amount of sodium sulfate enhances silica characteristics and battery separator production.

    摘要翻译： 包含颗粒状无定形沉淀二氧化硅与5至10重量％硫酸钠和小于10重量％水的颗粒，其中百分比基于二氧化硅，硫酸钠和水的重量，该颗粒具有 100至300m2 / g的BET表面积，1.8至3.6cm3 / g的总入侵体积和180至320cm 3 / 100g的DBP吸油量可用于微孔电池隔板中以引入全部 或一部分所需的硫酸钠至电池电解质。 此外，硫酸钠的增加量增加了二氧化硅特性和电池隔膜的生产。