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

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:
OSTI Identifier:
131903
Assignee:
Midwest Research Inst., Kansas City, MO (United States) CHO; SCA: 090900; 320305; 320604; PA: EDB-95:154412; SN: 95001485797
Patent Number(s):
US 5,464,602/A/
Application Number:
PAN: 8-370,470
Contract Number:
AC02-83CH10093
Resource Relation:
Other Information: PBD: 7 Nov 1995
Research Org:
Midwest Research Institute; Solar Energy Research Institute; National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE
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

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