Central Water and Power Commission, New Delhi.
*A project of basic research on the Cryoscopic Effect has been approved by the C.B.I, & P., whiqh will be conducted in the laboratories of the Central Water and Power Commission, New Delhi.
Experiments on the Cryoscopic Effect, described here, have led to a useful thumb rule, that the solute concentrates most where the solution freezes last. The Rule opens up possibilities of evolving convenient techniques and apparatus for solvent-solute separation in dilute solutions. The Rule has been pressed into service illustratively, and a zonal freezing process has been evolved, which promises high solute-concentration at a preselected location in the container, and more than 90 per cent solute-recovery from dilute solutions. The Rule and the process of Zonal Freezing seem to offer a technique of solute-concentration in several industries, including purification of brackish and saline waters, which is simpler and more economical than others known and practised currently.
