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    • 2. 发明授权
    • Catalyst for elemental sulfur recovery process
    • 元素硫回收工艺催化剂
    • US5384301A
    • 1995-01-24
    • US097367
    • 1993-07-23
    • Maria Flytzani-StephanopoulosWei Liu
    • Maria Flytzani-StephanopoulosWei Liu
    • B01D53/86B01J23/10C01B17/04
    • B01D53/8609B01J23/10C01B17/0473C01B17/0486
    • A catalytic reduction process for the direct recovery of elemental sulfur from various SO.sub.2 -containing industrial gas streams. The catalytic process provides high activity and selectivity, as well as stability in the reaction atmosphere, for the reduction of SO.sub.2 to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over a metal oxide composite catalyst having one of the following empirical formulas:[(OF.sub.2).sub.1-n (RO.sub.1)n].sub.1-k M.sub.k,[(FO.sub.2).sub.1-n (RO.sub.1.5).sub.n ].sub.1-k M.sub.k, or[Ln.sub.x Zr.sub.1-x O.sub.2-0.5x ].sub.1-k M.sub.kwherein FO.sub.2 is a fluorite-type oxide; RO represents an alkaline earth oxide; RO.sub.1.5 is a Group IIIB or rare earth oxide; Ln is a rare earth element having an atomic number from 57 to 65 or mixtures thereof; M is a transition metal or a mixture of transition metals; n is a number having a value from 0.0 to 0.35; k is a number having a value from 0.0 to about 0.5; and x is a number having a value from about 0.45 to about 0.55.
    • 用于从各种含SO2的工业气体流直接回收元素硫的催化还原方法。 催化方法提供高活性和选择性,以及在反应气氛中的稳定性,用一氧化碳或其它还原气体还原SO2至元素硫产物。 二氧化硫和还原气体的反应发生在具有以下经验式之一的金属氧化物复合催化剂上:[(OF2)1-n(RO1)n] 1-kMk,[(FO2)1-n(RO1。 5)n] 1-kMk或[LnxZr1-xO2-0.5x] 1-kMk其中FO2是萤石型氧化物; RO代表碱土金属氧化物; RO1.5是IIIB族或稀土氧化物; Ln是原子序数为57〜65的稀土元素或其混合物; M是过渡金属或过渡金属的混合物; n是0.0至0.35的数值; k是0.0至约0.5的数值; x为约0.45至约0.55的数值。