| dc.description.abstract | The Bouyancy Weighing-Bar Method is a method which apparatus has a simple
structure and this method can produce the high accuracy result in particle size
distribution measurement of the settling and floating particle. In this method, the
density change in a suspension due to particle migration is measured by weighing
buoyancy against a weighing-bar hung in the suspension, and the particle size
distribution is calculated using the length of the bar and the time course change in the
mass of the bar. In the present experiment, we focused to develop the buoyancy
weighing–bar method for liquid-liquid systems with the different density. We used
kerosene-water as samples of experiment. The investigation of the separation time of
kerosene-water has been done by the buoyancy weighing-bar method at
concentration ratio between kerosene with water of 99% : 1%; 98% :2%; 97% :3%;
96% : 4% and 95% : 5% which varied with rod diameter of 20 mm, 15 mm, 10 mm
and 5 mm. The result data obtained by the buoyancy weighing-bar method were
compared with the gas chromatography. The purity of kerosene at concentration of
99% kerosene : 1% water at 110 seconds and 1500 seconds is 89,3359% and
98,9741%. Based on the data obtained, the buoyancy weighing–bar method can be
used to determine the optimal time of kerosene-water separation. Beside, the
buoyancy weighing-bar method could be used to measure the droplet size
distribution of water at concentration of 99% kerosene : 1% water and at
concentration of 98% kerosene : 2% water. The precision of the resulting droplet
size distribution is comparable to that of a coulter counter method. This ability is a
novel method in droplet size distribution measurement and very useful in the
chemical industry. | en_US |
