Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Patent
1991-09-16
1993-09-28
Brunsman, David
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
134 10, 134 26, 423 92, 423 98, 75715, 75743, 429 49, C01G 2100, H01M 1047
Patent
active
052483428
ABSTRACT:
The present invention is directed to improved methods for processing battery wastes, battery casing debris and other lead contaminated materials. The improved processes of the present invention provide less environmentally stressful methods for recovering lead from such materials while at the same time producing scrap or recyclable ebonite and plastics having reduced and environmentally acceptable lead and leachable lead levels. Most of the lead is first removed by trammel scrubbing. In another aspect of the present invention ebonite and other hard surface materials to which are adhered lead contaminants are mixed with water and abraded in a high energy scrubber to remove the adhered contaminants prior to separation of the cleaned ebonite from solution. This simple and environmentally preferred hydromechanical process provides clean scrap or recyclable ebonite. In another aspect of the present invention, plastic and other soft materials contaminated with lead are mixed with a solution having a pH greater than about 7, preferably about 1-5 percent-by-weight alkali hydroxide solution, to dissolve lead contaminants. Separation of particulates produces clean scrap or recyclable plastic while carbonation of the wash water permits recovery of lead carbonate. Finally, the present invention provides methods for controlling dust contamination prior to and during processing by spraying the fine, raw materials with an aqueous solution of a wetting agent, preferably about 2 percent-by-weight alkali carbonate, bicarbonate or sesquicarbonate in water.
REFERENCES:
patent: 3679395 (1972-07-01), Smyers et al.
patent: 3883348 (1975-05-01), Acoveno et al.
patent: 4118219 (1978-10-01), Elmore et al.
patent: 4180251 (1979-12-01), Jaquay
patent: 4238462 (1980-12-01), Hardison
patent: 4310351 (1982-01-01), Lieberman
patent: 4333219 (1982-06-01), Ginatta
patent: 4340421 (1982-07-01), Bergsoe
patent: 4341636 (1982-07-01), Harder et al.
patent: 4460442 (1984-07-01), Ducati
patent: 4652381 (1987-03-01), Inglis
patent: 4769116 (1988-09-01), Olper et al.
patent: 5173277 (1992-12-01), Montogomery et al.
Kube Wolfram H.
Montgomery Alistair H.
Brunsman David
NL Industries Inc.
LandOfFree
Methods for processing battery waste and other lead-contaminated does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods for processing battery waste and other lead-contaminated, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for processing battery waste and other lead-contaminated will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2188495