Selective resin flotation from coal by controlled oxidation

Details Selective resin flotation from coal by controlled oxidation Selective resin flotation from coal by controlled oxidation

1986-10-17

1988-02-09

Bashore, S. Leon

Classifying, separating, and assorting solids

Fluid suspension

Liquid

B03D 102

Patent

active

047240717

ABSTRACT:
Disclosed is a process for separating resin from reduced size resin-bearing coal particles by treating the particles with ozone. Particles of reduced size resin-bearing coal are preferably mixed with water to form a slurry. The slurry is then treated with ozone for a short length of time. The slurry is then subjected to froth flotation. The ozone selectively oxidizes the coal, decreasing its hydrophobicity causing the relatively more hydrophobic resin to attach to the bubbles formed during the flotation process. A much improved separation efficiency for resin flotation from coal is observed.

REFERENCES:
patent: 1773997 (1930-08-01), Green
patent: 1869532 (1932-08-01), Weinig
patent: 2506301 (1950-05-01), Klepetko
patent: 2591830 (1952-04-01), Klepetko
patent: 3655038 (1972-04-01), Mercade
patent: 4377473 (1983-03-01), Laros
patent: 4537599 (1985-08-01), Greenwald, Sr.
patent: 4543104 (1985-09-01), Brown, Jr. et al.
"Recovery of Resin from Utah Coal", by E. Klepetko, AIMME Tech. Publication, 2166 .COPYRGT.1947.
Hackh's Chemical Dictionary, 4th Edition, McGraw-Hill, pp. 484 and 502.

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