Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1992-03-17
1994-09-06
Sever, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210639, 210652, 210681, 210724, 2101952, 2102572, 210241, B01D 6102, B01D 6104, B01D 6108, B01D 6112
Patent
active
053445660
ABSTRACT:
This invention provides a fast and efficient method and process to remove lead from washwater streams that are part of the deleading process. By employing a two step process using epsom salts as a precipitating chemical to convert dilute lead concentrations into a very slightly soluble solid and then processing the small residue with a reverse osmosis unit the lead is totally removed from part of the water and the lead containing reject stream from the reverse osmosis unit is recucled through the process to again treat the lead. A reduction in total waste volume of over 90% is achieved.
REFERENCES:
patent: 4261833 (1981-04-01), Pohl et al.
patent: 5045214 (1991-09-01), Walker
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