Method of dispersing particulate aerosol tracer
US4744919A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Sep 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S252/965
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.