Coating processes – Particles – flakes – or granules coated or encapsulated – Inorganic base
Patent
1993-11-16
1995-08-29
Beck, Shrive
Coating processes
Particles, flakes, or granules coated or encapsulated
Inorganic base
4273722, 588254, B05D 700
Patent
active
054458498
ABSTRACT:
Disclosed is a process for manufacturing of pellets of chrysotile asbestos fibers, wherein asbestos fibers containing from 5 to 20% by weight of water are pelletized to form wet pellets that are subsequently dried until their residual water content reaches 0 to 1% by weight. Then, an aqueous solution or suspension of a substance compatible with the intended use of the pellets is sprayed onto the same to form a selective protective coating that eliminates release of asbestos dust and airborne particles. The obtained pellets have excellent mechanical properties that make them easy to handle, thereby allowing safe and easy transportation of chrysotile asbestos in bulk.
REFERENCES:
patent: 3623858 (1971-11-01), Smith et al.
patent: 3928060 (1975-12-01), Smith et al.
patent: 5028266 (1991-07-01), Rettenmaier
patent: 5118544 (1992-06-01), Delvaux et al.
"Guidelines for the Use of Encapsulants on Asbestos-Containing Materials", Office of Toxic Substances, United States Environmental Protection Agency, Jun. 1981.
Beerli Eric
Delvaux Pierre
Legast Pierre
Lesmerises Normand
Beck Shrive
Ceram SNA Inc.
Maiorana David M.
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