ONLINE SEPARATION OF IODINE SPECIES IN-REACTOR WATER USING MIXER-SETTLERS

A method for separation of iodine species from water has been develope d. It is based on liquid-liquid extraction and separation is achieved in four extraction steps. A system based on this method for continuous separation of iodine species using mixer-settlers has been developed. It consists of four mixer-sealer batteries with 4,4,6 and 6 mixer-set tler stages each. As organic phase an aliphatic kerosene is used and t he separation is improved if the organic solvent has been pretreated w ith iodine carrier, stripped and washed. With an aqueous feed flowrate of 10 ml/min and mixer-settler battery phase flowratios of approximat ely 0.1 except for the elementary iodine strip battery with a phase fl owratio of 1, the system separation performance is 92% for methyl iodi de, 97% for iodate and elementary iodine and 99% for iodide.