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Title: Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics

Abstract

An improved method is provided for separating acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) plastics from each other. The ABS and HIPS plastics are shredded to provide a selected particle size. The shredded particles of the ABS and HIPS plastics are applied to a solution having a solution density in a predefined range between 1.055 gm/cm.sup.3 and 1.07 gm/cm.sup.3, a predefined surface tension in a range between 22 dynes/cm to 40 dynes/cm and a pH in the range of 1.77 and 2.05. In accordance with a feature of the invention, the novel method is provided for separating ABS and HIPS, two solid thermoplastics which have similar densities by selectively modifying the effective density of the HIPS using a binary solution with the appropriate properties, such as pH, density and surface tension, such as a solution of acetic acid and water or a quaternary solution having the appropriate density, surface tension, and pH.

Inventors:
 [1];  [2];  [3];  [4];  [5]
+ Show Inventor Affiliations
  1. Chicago, IL
  2. Amherst, NY
  3. Downers Grove, IL
  4. (Crest Hill, IL)
  5. Oak Lawn, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
OSTI Identifier:
871083
Patent Number(s):
5653867
Assignee:
University of Chicago (Chicago, IL)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS B03B - SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29B - PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED
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DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; separation; impact; polystyrene; hips; acrylonitrile; butadiene; styrene; plastics; improved; provided; separating; shredded; provide; selected; particle; size; particles; applied; solution; density; predefined; range; 055; gm; cm; 07; surface; tension; 22; dynes; 40; ph; 77; 05; accordance; feature; novel; solid; thermoplastics; similar; densities; selectively; modifying; effective; binary; appropriate; properties; acetic; acid; water; quaternary; acetic acid; improved method; particle size; novel method; surface tension; selected particle; selectively modifying; impact polystyrene; solid thermoplastic; butadiene styrene; acrylonitrile butadiene; binary solution; /209/241/521/

Citation Formats

Jody, Bassam J, Arman, Bayram, Karvelas, Dimitrios E, Pomykala, Jr., Joseph A., and Daniels, Edward J. Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics. United States: N. p., 1997. Web.
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Jody, Bassam J, Arman, Bayram, Karvelas, Dimitrios E, Pomykala, Jr., Joseph A., & Daniels, Edward J. Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics. United States.
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Jody, Bassam J, Arman, Bayram, Karvelas, Dimitrios E, Pomykala, Jr., Joseph A., and Daniels, Edward J. Wed . "Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics". United States. https://www.osti.gov/servlets/purl/871083.
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@article{osti_871083,
title = {Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics},
author = {Jody, Bassam J and Arman, Bayram and Karvelas, Dimitrios E and Pomykala, Jr., Joseph A. and Daniels, Edward J},
abstractNote = {An improved method is provided for separating acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) plastics from each other. The ABS and HIPS plastics are shredded to provide a selected particle size. The shredded particles of the ABS and HIPS plastics are applied to a solution having a solution density in a predefined range between 1.055 gm/cm.sup.3 and 1.07 gm/cm.sup.3, a predefined surface tension in a range between 22 dynes/cm to 40 dynes/cm and a pH in the range of 1.77 and 2.05. In accordance with a feature of the invention, the novel method is provided for separating ABS and HIPS, two solid thermoplastics which have similar densities by selectively modifying the effective density of the HIPS using a binary solution with the appropriate properties, such as pH, density and surface tension, such as a solution of acetic acid and water or a quaternary solution having the appropriate density, surface tension, and pH.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
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Works referenced in this record:

Recovering plastics for recycling by mineral processing techniques
journal, February 1995

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