Process and apparatus for the separation of particles into three

Details Process and apparatus for the separation of particles into three Process and apparatus for the separation of particles into three

1979-06-04

1984-07-31

Reeves, Robert B.

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Sorting special items or sorting by methods and apparatus...

209576, B07C 502

Patent

active

044624956

ABSTRACT:
A process is disclosed for the separation of a mixture of particles containing differing concentrations of a selected component into three fractions of similar concentration of the selected component. The process comprises conditioning the mixture of particles with a hydrophobic or hydrophilic surface-active agent to selectively coat each of the particles relative to the concentration of the selected component in each particle. In combination with the surface-active agent there is provided a fluorescent dye which either adheres to the coated or non-coated particles. The mixture of conditioned particles is then irradiated to excite and induce fluorescence of the fluorescent dye to a degree sufficient to distinguish among the intensities of fluorescence of the fluorescent dye on the various particles. The particles are separated into concentrate, middling and tailing fractions based upon distinguishing among the intensities of fluorescence.

REFERENCES:
patent: 3346111 (1967-10-01), Thompson et al.
patent: 3356211 (1967-12-01), Mathews
patent: 3412375 (1969-10-01), Mathews
patent: 3795310 (1974-03-01), Buchot
patent: 3901793 (1975-08-01), Buchot
patent: 3936188 (1976-02-01), Sawyer

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