Published December 11, 2001 | Version v1
Patent Open

Process to recycle shredder residue

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Description

A system and process for recycling shredder residue, in which separating any polyurethane foam materials are first separated. Then separate a fines fraction of less than about ¼ inch leaving a plastics-rich fraction. Thereafter, the plastics rich fraction is sequentially contacted with a series of solvents beginning with one or more of hexane or an alcohol to remove automotive fluids; acetone to remove ABS; one or more of EDC, THF or a ketone having a boiling point of not greater than about 125° C. to remove PVC; and one or more of xylene or toluene to remove polypropylene and polyethylene. The solvents are recovered and recycled.

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Additional details

Identifiers

Patent application number
US 97242692 A
Patent number
US 6329436 B1
Other
oai:uchicago.tind.io:8942

Dates

Patent filed
1992-11-05

UChicago Information

Division(s)
Physical Sciences Division, Pritzker School of Molecular Engineering
Department(s)
Chemistry