A process for the production of thorium phosphate from thorium oxalate and recovery of oxalic acid

摘要

#$%^&*AU2016210678A120180222.pdf#####ABSTRACT Ti: A process for the production of thorium phosphate A process for producing insoluble thorium phosphastes from thorium oxalate comprising the steps of (i) rpulping the thorium oxaae pmcipitate in water and reacting the slurry at about 60-7C with an alkali phosphate compound to precipitate as thorium phosphate and sodium oxalate (ii) separating such thorium phosphate precipitate by filtration (iii) crystaIizing the sodium oxalate fiom filtrate (iv) outing the sodium oxalate thus formed with sulphuric acid to convert the oxalate to oxalic acid and sodium sulphate (vi) crystallizing the oxalic acid first by cooling and sodium sulphate in the next sep by evporaion and then lg the Oxalic acid in step (i) as well as the moher liquor o. sodiumsulphate crystalisation poess in step (iv).