Patent ID: 6270682
Filing Date: 2001-08-07
Classification: C02F,Y10S

Abstract:
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.