发明名称 Process for selectively removing sulfur dioxide
摘要 Gas feed streams containing sulfur dioxide such as flue gas streams are first contacted with an aqueous solution of inorganic sulfites and bisulfites having a pH range from about 2 to about 6.5 to remove a minor amount of sulfur dioxide. The same gas stream is then contact with a second aqueous solution of sulfites and bisulfites having a pH range from about 7.0 to about 12.5. Alkali metal hydroxide or ammonium hydroxide solution is added to the liquid inlet of the second contactor and the solution of the second contactor is pumped to the liquid inlet of the first contactor.
申请公布号 US4834959(A) 申请公布日期 1989.05.30
申请号 US19860905426 申请日期 1986.09.10
申请人 THE DOW CHEMICAL COMPANY 发明人 KENT, VAN ALBERT;KIRBY, LARRY H.;BEHR, WILLIAM R.
分类号 B01D53/50;C01B17/60;C01B17/62;C01C1/22;C01D5/14 主分类号 B01D53/50
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