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Title: Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid

Abstract

A process is described for pyrolyzing plastic waste feed streams containing polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene to recover polystyrene, HCl and terephthalic acid comprising: heating the plastic waste feed stream to a first temperature; adding an acid or base catalyst on an oxide or carbonate support; heating the plastic waste feed stream to pyrolyze polyethylene terephthalate and polyvinyl chloride; separating terephthalic acid or HCl; heating to a second temperature to pyrolyze polystyrene; separating styrene; heating the waste feed stream to a third temperature to pyrolyze polyethylene; and separating hydrocarbons. 83 figs.

Inventors:
;
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States); Solar Energy Research Institute; National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
131903
Patent Number(s):
5,464,602
Application Number:
PAN: 8-370,470
Assignee:
Midwest Research Inst., Kansas City, MO (United States)
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PLASTICS; PYROLYSIS; POLYSTYRENE; MATERIALS RECOVERY; HYDROCHLORIC ACID; TEREPHTHALIC ACID; CATALYSTS; PVC; POLYETHYLENES; SEPARATION PROCESSES; WASTE PROCESSING

Citation Formats

Evans, R J, and Chum, H L. Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid. United States: N. p., 1995. Web.
Evans, R J, & Chum, H L. Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid. United States.
Evans, R J, and Chum, H L. Tue . "Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid". United States.
@article{osti_131903,
title = {Sequential pyrolysis of plastic to recover polystyrene, HCl and terephthalic acid},
author = {Evans, R J and Chum, H L},
abstractNote = {A process is described for pyrolyzing plastic waste feed streams containing polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene to recover polystyrene, HCl and terephthalic acid comprising: heating the plastic waste feed stream to a first temperature; adding an acid or base catalyst on an oxide or carbonate support; heating the plastic waste feed stream to pyrolyze polyethylene terephthalate and polyvinyl chloride; separating terephthalic acid or HCl; heating to a second temperature to pyrolyze polystyrene; separating styrene; heating the waste feed stream to a third temperature to pyrolyze polyethylene; and separating hydrocarbons. 83 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {11}
}