Abstract
(I)Mechanism of Dehydration by Microscope The author exami-ned the mechanism of the dehydration of low temperature tar by microscope.The dehydration of low temperature tar and the removal of free carbon and coal dust from it is difficult through a mere physical treatment.But the adding of light oil produced by fractionating the low temperature tar, facilitates these operations.In this research, the dehydration was attained by the blending of such materials as acidic, neutral or basic components of the light oil, and among them the acidic oil has been recognized as most effective.
(II)Effect of Centrifugal Separation In the dehydration Method described above, the effective ratio of light oil to tar is 2-3: 1, but when the centrifugal separation is combined with it, the ratio can be reduced to about half and heat consumption recovering the light oil become smaller.
