Surface area generation and droplet size control in solvent extr

Details Surface area generation and droplet size control in solvent extr Surface area generation and droplet size control in solvent extr

1987-07-30

1988-08-30

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

B03C 500

Patent

active

047675152

ABSTRACT:
A method and system for solvent extraction where droplets are shattered by a high intensity electric field. These shattered droplets form a plurality of smaller droplets which have a greater combined surface area than the original droplet. Dispersion, coalescence and phase separation are accomplished in one vessel through the use of the single pulsing high intensity electric field. Electric field conditions are chosen so that simultaneous dispersion and coalescence are taking place in the emulsion formed in the electric field. The electric field creates a large amount of interfacial surface area for solvent extraction when the droplet is disintegrated and is capable of controlling droplet size and thus droplet stability. These operations take place in the presence of a counter current flow of the continuous phase.

REFERENCES:
patent: 4204934 (1980-05-01), Warren
"The Physical Review, Instability of Electrified Liquid Surfaces", John Zeleny, 2nd Series, vol. X, No. 1, 1917, pp. 1-6.
"Proc. Roy. Soc., Some Investigations on the Deformation and Breaking of Water Drops in Strong Electric Fields"--W. A. Macky, A. vol. 133, Jul. 2, 1981, pp. 565-587.
"Liquid Phase Separation in Pulsed D. C. Fields"--P. J. Bailes and S. K. L. Larkai, vol. 60, 1982, pp. 115-121.
"Separation Science and Technologys Electrical Field Contactor for Solvent Extraction"-L. Martin and P. Vignet, vol. 18, 1984, pp. 1455-1471.

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