Coating processes – Particles – flakes – or granules coated or encapsulated – Inorganic base
Patent
1982-09-29
1984-07-31
Sever, Frank
Coating processes
Particles, flakes, or granules coated or encapsulated
Inorganic base
210501, 428403, 428404, B01D 2316, B05D 700
Patent
active
044630310
ABSTRACT:
A process for preparing a silver-plated coral sand useful as a bacteriological inhibitor for drinking water is provided. The process comprises (1) heating desalted coral sand in an inert gas under reduced pressure; (2) thoroughly washing the resulting activated coral sand with water; (3) soaking the so washed coral sand in a silver-ammonia complex solution with heating under reduced pressure, adding a trace amount of glucose as a reducing agent to the complex solution, maintaining the soaked state to thereby effect plating the coral sand with silver; (4) evaporating the silver-plate coral sand to dryness with heating under reduced pressure; (5) thoroughly washing the silver-plated coral sand with water, and (6) then drying the silver-plated coral sand.
The silver-plated coral sand bacteriological inhibitor has a strong sterilizing power against bacteria in water and can maintain or even improve water quality over long periods of time; at the same time, the bacteriological inhibitor can change pH to a weakly alkaline side and mineralize water.
REFERENCES:
patent: 3242073 (1966-03-01), Guebert et al.
patent: 4407865 (1983-10-01), Nice
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