| 摘要 |
<p>The subject of the present invention is a catalyst for the production of chlorine from hydrogen chloride by thermocatalytic oxidation with oxygen comprising gases, wherein the catalyst is based on copper compounds, characterized in that the catalyst comprises copper II aluminate as catalytically active component, preferably copper aluminate of the spinel type. The thus obtained copper based catalyst exhibits a stable activity in chlorine production applications, hence clearly superior to state-of-the-art copper based catalysts. The superior resistance against activity deterioration is assigned to the presence of copper II aluminate as catalytically active component, preferably copper aluminates of the spinel type, namely CuAl 2 O 4 or mixtures of CuAl 2 O 4 and CuAlO 2 , finely dispersed in diluting Al 2 O 3 . Contrary to the thus embedded CuAl 2 O 4 and CuAlO 2 aluminates, which provide the stable redox activity, the strong deterioration behavior of state-of-the-art copper based catalysts is assigned to uncombined CuO on the catalyst surface, which can not contribute to a stable redox activity due to its prone to rapid volatilization.</p> |
