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Title: Recovery and separation of high-value plastics from discarded household appliances

Argonne National Laboratory is conducting research to develop a cost- effective and environmentally acceptable process for the separation of high-value plastics from discarded household appliances. The process under development has separated individual high purity (greater than 99.5%) acrylonitrile-butadiene-styrene (ABS) and high- impact polystyrene (HIPS) from commingled plastics generated by appliance-shredding and metal-recovery operations. The process consists of size-reduction steps for the commingled plastics, followed by a series of gravity-separation techniques to separate plastic materials of different densities. Individual plastics of similar densities, such as ABS and HIPS, are further separated by using a chemical solution. By controlling the surface tension, the density, and the temperature of the chemical solution we are able to selectively float/separate plastics that have different surface energies. This separation technique has proven to be highly effective in recovering high-purity plastics materials from discarded household appliances. A conceptual design of a continuous process to recover high-value plastics from discarded appliances is also discussed. In addition to plastics separation research, Argonne National Laboratory is conducting research to develop cost-effective techniques for improving the mechanical properties of plastics recovered from appliances.
Authors:
; ; ;  [1] ;  [2]
  1. Argonne National Lab., IL (United States). Energy Systems Div.
  2. Argonne National Lab., IL (United States). Energy Systems Div.|[Praxair, Inc., Tarrytown, NY (United States)
Publication Date:
OSTI Identifier:
205922
Report Number(s):
ANL/ES/CP--87943; CONF-960202--6
ON: DE96006900
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996; Other Information: PBD: [1996]
Research Org:
Argonne National Lab., IL (United States). Energy Systems Div.
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 09 BIOMASS FUELS; APPLIANCES; RECYCLING; PLASTICS; SORTING; POLYSTYRENE; POLYPROPYLENE; PVC; NYLON; COLOR; DENSITY; SURFACE TENSION