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    • 4. 发明申请
    • CALCINING CHAMBER AND PROCESS
    • 计算室和过程
    • US20130115157A1
    • 2013-05-09
    • US13810193
    • 2011-07-12
    • Matthew Sakae Forkin
    • Matthew Sakae Forkin
    • C01B33/10
    • C01B33/10C01B33/10705F27B14/08
    • Solid materials capable of producing toxic and/or corrosive gases by thermal decomposition are heated in a stirred in a sealable crucible. The stirring rod is supported on a downward extending shaft using a combination of a lip seal or other mechanical seal and a ferro-fluidic seal or rotary feed through. The lip seal region is evacuated to reduce the chance that the small upward flow of corrosive gas will detrimentally react with components of the ferro-fluid. In a process for calcining sodium fluorosilicate to product silicon tetra-fluoride gas, the lip seal and ferro-fluidic seal regions are purged and/or blanked to prevent the absorption of water during an initial drying phase. A preferred embodiment of the process of synthesis of a high purity corrosive gas generated by decomposition of a precursor solid at high temperature deploys a dry vacuum pump and a compressor in series so that the corrosive gas is pressurized as it fills storage containers. Accordingly, the reaction of water with silicon tetra-fluoride to produce corrosive hydrogen fluoride gas is prevented.
    • 能够通过热分解产生有毒和/或腐蚀性气体的固体材料在可密封的坩埚中被搅拌加热。 搅拌杆使用唇形密封件或其他机械密封件和铁流体密封件或旋转进料通过的组合来支撑在向下延伸的轴上。 唇密封区域被抽真空以减少小的向上流动的腐蚀性气体将有害地与铁液体的组分反应的机会。 在将氟硅酸钠煅烧成四氟化硅气体的过程中,唇形密封件和铁流体密封区域被清洗和/或消隐以防止在初始干燥阶段期间吸收水分。 通过在高温下分解前体固体产生的高纯度腐蚀性气体的合成方法的优选实施方案是串联干燥真空泵和压缩机,使得腐蚀性气体在填充储存容器时被加压。 因此,防止水与四氟化硅反应产生腐蚀性氟化氢气体。