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    Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes
    90.
    发明授权
    Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes 有权
    沉淀二氧化硅，具有和不含沉淀碳的硅胶与苛性生物质灰分溶液和工艺

    公开(公告)号：US06375735B1

    公开(公告)日：2002-04-23

    申请号：US09540568

    申请日：2000-03-31

    Applicant: Douglas K. Stephens ,  Clyde W. Wellen ,  Jeffrey B. Smith ,  Kenneth F. Kubiak

    Inventor： Douglas K. Stephens ,  Clyde W. Wellen ,  Jeffrey B. Smith ,  Kenneth F. Kubiak

    IPC: C01B3312

    CPC classification number: C01B33/193 ,  C01B33/143 ,  C01B33/154 ,  C01P2002/02 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/19 ,  C01P2006/80 ,  C01P2006/90 ,  C04B18/101 ,  C09C1/3054 ,  C09K3/1409 ,  Y02W30/92 ,  Y10T428/2991 ,  C04B20/023

    Abstract: Disclosed are amorphous precipitated silicas, silica gels, and amorphous carbons derived from biomass and methods of producing them with and without adhered or deposited amorphous carbons produced by acidifying a caustic silicate solution produced by caustic digestion of biomass ash containing silica with and without activated carbon, the ash being obtained from thermal pyrolysis of the biomass, the acidifying effective to produce a slurry of the precipitated silica and silica gels with and without adhered or deposited amorphous carbon, and separated from the slurry the precipitated silicas and silica gels with and without the adhered or deposited amorphous carbons. The properties of the precipitated silica with adhered or deposited carbon being within the range as utilized in rubber compositions thereby avoiding the blending of silica and carbon components for such use. The precipitated silicas and silica gels without adhered or deposited carbon having metal contaminants present in low concentrations which when used in formulation of chemical-mechanical-planerization slurries used in polishing silicon wafers in the manufacture of computer chips and other electronic devices do not contaminate the wafer and final chip product and the other electronic devices.

    Abstract translation: 公开了无定形沉淀二氧化硅，二氧化硅凝胶和来自生物质的无定形碳，以及通过酸化含有和不含活性炭的二氧化硅的生物质灰分的苛性碱消解产生的苛性硅酸盐溶液产生的无和非粘附碳沉积或沉积的无定形碳的方法， 灰分从生物质的热解中获得，酸化有效地产生沉淀的二氧化硅和硅胶的浆料，其具有和不具有粘附或沉积的无定形碳，并且从浆料中分离出沉淀的二氧化硅和硅胶，具有和不具有粘附 或沉积的无定形碳。 具有粘附或沉积碳的沉淀二氧化硅的性质在橡胶组合物中所用的范围内，从而避免了二氧​​化硅和碳组分的混合用于这种用途。 沉积的二氧化硅和硅胶，没有粘附或沉积的碳，其具有以低浓度存在的金属污染物，当用于制造计算机芯片和其他电子器件时用于抛光硅晶片的化学机械抛光浆料的配方中，不会污染晶片 和最终的芯片产品和其他电子设备。

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