Method of dispersing particulate aerosol tracer

Details Method of dispersing particulate aerosol tracer Method of dispersing particulate aerosol tracer

1986-09-12

1988-05-17

Lovering, Richard D.

Compositions

Inorganic luminescent compositions

Tungsten containing

73188, 239 21, 2524081, 252965, 502 65, 502 66, C09K 330, C01N 3100, C01N 3300, G01W 100

Patent

active

047449195

ABSTRACT:
A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from the group consisting of natural mineral clays such as bentonite, and the dopant is selected from the group consisting of rare earth elements and transition elements. The tracers are dispersed by forming an aqueous salt solution with the dopant present as cations, dispersing the carriers in the solution, and then atomizing the solution under heat sufficient to superheat the solution droplets at a level sufficient to prevent reagglomeration of the carrier particles.

REFERENCES:
patent: 2068987 (1937-01-01), King, Jr.
patent: 2232728 (1941-02-01), Pleasants
patent: 3072563 (1963-01-01), Hickson
patent: 3556988 (1971-01-01), Stover et al.
patent: 3751913 (1973-08-01), Paine et al.

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