Treatment of automobile shredder residue by vacuum pyrolysis

Details Treatment of automobile shredder residue by vacuum pyrolysis Treatment of automobile shredder residue by vacuum pyrolysis

1993-09-14

1995-09-19

Hastings, Karen M.

Distillation: processes, thermolytic

Feed other than coal, oil shale or wood

201 21, 201 30, 201 35, 585241, C10B 5300, C22B 100

Patent

active

054512972

ABSTRACT:
Metals are recovered from automobile shredder residue by subjecting the shredder residue to vacuum pyrolysis to produce non-condensable gases, condensable hydrocarbon vapors and water vapor, and a solid residue containing non-oxidized metals and a carbonaceous material. The vacuum pyrolysis is carried out at a temperature in the range of about 450.degree. to about 650.degree. C., under a subatmospheric pressure in the range of about 50 to about 200 mm Hg so as to thermally decompose and substantially completely vaporize organic matter adhered to the metals. At least one metal is separated from the solid residue, the metal being recovered in nonoxidized and substantially carbon-free form suitable for direct recycling.

REFERENCES:
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patent: 4052265 (1977-10-01), Kemp
patent: 4084521 (1978-04-01), Herbold et al.
patent: 4235676 (1980-11-01), Chambers
patent: 4474524 (1984-10-01), Kawakami et al.
patent: 4740270 (1988-04-01), Roy
patent: 4839151 (1989-06-01), Apffel

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