Abstract
Fundamental researches were conducted in order to anticipate the behavior of oily pollutants in seawater distillation process.
There were essentially no mineral oils in seawater, but coastal seawater was occasionally polluted by oily substances which were disposed or effiuented from factories, tankers, oil wells, etc. when they moved to the fresh water from the polluted feed in desalination process, they gave unpleasant smell and taste.
The simple distillation of some mineral oils mixed iri water or seawater were carried out under an atmospheric pressure. Those oils were almost immiscible, forming heterogeneous systems with water. They transfer into distilled water by steam-distillation. The volume of each oily component in the distillate agreed well with the calculated value. Even if there was a very small amount of heavy oily materials in the feed seawater, they polluted fresh water and gave foul smells.
Those oily pollutants in fresh water should be treated and removed by means of activated carbon adsorption process and so forth.
