| abstract |
Removal of sodium values from sodium contaminated solids, such as red mud, is achieved by contact of a slurry of such solids with a particulate cation exchanger and occurs at an enhanced rate compared with water washing or washing with an acidic solution. Regeneration of sodium loaded resin occurs more efficiently with a mixed solution of sodium sulphate and an acid, such as sulphuric acid, than with a sulphuric acid solution. |