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    • 2. 发明授权
    • Process for the recovery of selenium from waste gas
    • 从废气中回收硒的工艺
    • US3966889A
    • 1976-06-29
    • US523747
    • 1974-11-14
    • Hisashi KakutaShigetada MatobaKenichi ShimizuSatoshi Yamashita
    • Hisashi KakutaShigetada MatobaKenichi ShimizuSatoshi Yamashita
    • C01B19/02C01B19/00
    • C01B19/02
    • Selenium is recovered from combustion waste gas, especially the combustion waste gas evolved from glass melting furnaces by a process in which the waste gas is contacted with an absorbing solution containing an alkali metal sulfite or bisulfite, whereby metallic selenium and selenium compounds are absorbed, the temperature of the waste gas is decreased and the humidity of the waste gas is increased. The treated waste gas in then passed through a moist glass fiber filter which collects the remaining amounts of selenium from the waste gas. The absorbing solution is combined with the solution used to wash the glass fiber filter and the combined solutions are treated with an acid which reduces all of the selenium present in the solution to metallic selenium which precipitates from solution.
    • 从燃烧废气中回收硒,特别是通过废气与含有碱金属亚硫酸盐或亚硫酸氢盐的吸收溶液接触的方法从玻璃熔炉逸出的燃烧废气,从而金属硒和硒化合物被吸收, 废气的温度降低,废气的湿度增加。 经处理的废气然后通过潮湿的玻璃纤维过滤器,其从废气中收集剩余量的硒。 将吸收溶液与用于洗涤玻璃纤维过滤器的溶液组合,并且用酸处理组合溶液,其将溶液中存在的所有硒还原为从溶液中沉淀出的金属硒。