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    • 13. 发明授权
    • Method for producing sodium dithionite
    • 生产连二亚硫酸钠的方法
    • US4605545A
    • 1986-08-12
    • US736167
    • 1985-05-20
    • William B. DarlingtonCharles H. Hoelscher
    • William B. DarlingtonCharles H. Hoelscher
    • C01B17/66
    • C01B17/66
    • Disclosed is a process of producing anhydrous sodium dithionite by contacting sulfur dioxide-containing formamide and sodium amalgam, separating a sodium dithionite-containing formamide solution from the sodium amalgam and precipitating anhydrous sodium dithionite from the product formamide solution by mixing the sodium dithionite-containing formamide solution with isopropanol, n-propanol, gamma-butyrolactone, tetrahydrofuran or N-methyl-2-pyrrolidone. The sulfur dioxide may be contacted countercurrently with the sodium amalgam in a continuous process. A neutralizing agent can optionally be added to the sodium dithionite-containing formamide solution separated from the amalgam to reduce acidic decomposition of the sodium dithionite.
    • 公开了一种通过使含二氧化硫的甲酰胺和钠汞齐接触的方法,通过将含有连二亚硫酸钠的甲胺钠溶液与钠汞齐分离,并从产物甲酰胺溶液中沉淀出无水连二亚硫酸钠,通过混合含连二亚硫酸钠的甲酰胺 与异丙醇,正丙醇,γ-丁内酯,四氢呋喃或N-甲基-2-吡咯烷酮的溶液。 二氧化硫可以连续过程与钠汞齐逆流接触。 可以任选地将中和剂加入到从汞齐分离的含连二亚硫酸钠的甲酰胺溶液中以减少连二亚硫酸钠的酸分解。
    • 16. 发明授权
    • Electrolytic cell membrane sealing means
    • 电解细胞膜密封方式
    • US4175024A
    • 1979-11-20
    • US963248
    • 1978-11-22
    • William B. Darlington
    • William B. Darlington
    • C25B9/06C25B9/00C25B11/03C25B13/04
    • C25B9/066
    • Disclosed is an electrolytic cell having electrode units of opposite polarity where each of the electrode units have fingered electrodes extending outwardly therefrom toward the electrode unit of opposite polarity. In this way, the electrodes are interleaved between electrodes of opposite polarity. At least one of the electrode units has a base plate with fingered electrodes mechanically and electrically connected thereto. The fingered electrodes bear a synthetic separator such as a microporous diaphragm or a permionic membrane thereon with lap at the base. The electrolytic cell is characterized by a fingered, interleaved electrode of the electrode unit of opposite polarity compressively bearing upon the lap, whereby to provide an electrolyte-tight seal.
    • 公开了一种具有相反极性的电极单元的电解槽,其中每个电极单元具有从其向外延伸到相反极性的电极单元的指状电极。 以这种方式,电极在相反极性的电极之间交错。 电极单元中的至少一个具有基板,其具有机械和电连接的手指电极。 指状电极在其上具有合成分离器,例如微孔隔膜或其上的恒定膜,其底部具有搭接。 电解池的特征在于具有相反极性的电极单元的指形交错电极,其压缩地承载于搭接部,由此提供电解质密封。