Method for removing chlorate ions from solutions
AssigneeSolvay Deutschland GmbH
InventorsRutger Van Santen, Armin Klesing, Gerhard Neuenfeldt, Alfred Ottmann
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Abstract
The invention relates to a method for removing chlorate ions from solutions by means of catalytic treatment in the presence of hydrogen. According to the invention a rhodium and/or platinum catalyst is used. The choice of catalyst carrier depends on the amount of coadsorbents contained in the solution. The carrier material, which may be oxidic or non-oxidic, should also be easily wettable.
Claims16
A method for removing chlorate ions from a chlorate-containing solution also containing at least one anionic co-adsorbate, said method comprising subjecting the chlorate-containing solution to catalytic hydrogenation with a supported noble metal catalyst comprising at least one noble metal selected from rhodium and platinum in the presence of hydrogen, wherein the catalyst support is selected depending on the concentration of co-adsorbate contained in said chlorate-containing solution such that the support has an electronegativity of less than 2.2 when the co-adsorbate concentration is less than 5 g/liter, and the support has an electronegativity greater than 2.2 when the co-adsorbate concentration is greater than 5 g/liter, and the value of the difference of the electronegativities of the atoms, contained in the support material, being less than 1.
Dependencies are inferred from the claim text.