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Title: Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers

Abstract

A process of using fast pyrolysis to convert a plastic waste feed stream containing polycarbonate and ABS to high value monomeric constituents prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of a given polymer to its high value monomeric constituents prior to a temperature range that causes pyrolysis of other plastic components; selecting an acid or base catalysts and an oxide or carbonate support for treating the feed stream to affect acid or base catalyzed reaction pathways to maximize yield or enhance separation of the high value monomeric constituents of polycarbonate and ABS in the first temperature program range; differentially heating the feed stream at a heat rate within the first temperature program range to provide differential pyrolysis for selective recovery of optimum quantities of the high value monomeric constituents prior to pyrolysis or other plastic components; separating the high value monomeric constituents from the polycarbonate to cause pyrolysis to a different high value monomeric constituent of the plastic waste and differentially heating the feed stream at the second higher temperature program range to cause pyrolysis of different high value monomeric constituents; and separating the different high value monomeric constituents.

Inventors:
 [1];  [2]
  1. (Lakewood, CO)
  2. (Arvada, CO)
Issue Date:
Research Org.:
MIDWEST RESEARCH INSTITUTE
OSTI Identifier:
869356
Patent Number(s):
5321174
Assignee:
Midwest Research Institute (Kansas City, MO) NREL
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
controlled; catalystic; thermal; sequential; pyrolysis; hydrolysis; polycarbonate; plastic; waste; recover; monomers; process; fast; convert; feed; stream; containing; value; monomeric; constituents; prior; components; therein; comprising; selecting; temperature; range; polymer; causes; acid; base; catalysts; oxide; carbonate; support; treating; affect; catalyzed; reaction; pathways; maximize; yield; enhance; separation; differentially; heating; heat; rate; provide; differential; selective; recovery; optimum; quantities; separating; constituent; recover monomers; optimum quantities; sequential pyrolysis; thermal sequential; base catalyzed; heat rate; differentially heating; waste feed; monomeric constituents; components therein; temperature range; monomeric constituent; feed stream; value monomeric; stream containing; plastic components; plastic waste; provide differential; enhance separation; maximize yield; differential pyrolysis; catalyzed reaction; causes pyrolysis; therein comprising; reaction pathways; selective recovery; fast pyrolysis; containing poly; value monomer; reaction pathway; carbonate support; /585/

Citation Formats

Evans, Robert J., and Chum, Helena L. Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers. United States: N. p., 1994. Web.
Evans, Robert J., & Chum, Helena L. Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers. United States.
Evans, Robert J., and Chum, Helena L. Sat . "Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers". United States. https://www.osti.gov/servlets/purl/869356.
@article{osti_869356,
title = {Controlled catalystic and thermal sequential pyrolysis and hydrolysis of polycarbonate and plastic waste to recover monomers},
author = {Evans, Robert J. and Chum, Helena L.},
abstractNote = {A process of using fast pyrolysis to convert a plastic waste feed stream containing polycarbonate and ABS to high value monomeric constituents prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of a given polymer to its high value monomeric constituents prior to a temperature range that causes pyrolysis of other plastic components; selecting an acid or base catalysts and an oxide or carbonate support for treating the feed stream to affect acid or base catalyzed reaction pathways to maximize yield or enhance separation of the high value monomeric constituents of polycarbonate and ABS in the first temperature program range; differentially heating the feed stream at a heat rate within the first temperature program range to provide differential pyrolysis for selective recovery of optimum quantities of the high value monomeric constituents prior to pyrolysis or other plastic components; separating the high value monomeric constituents from the polycarbonate to cause pyrolysis to a different high value monomeric constituent of the plastic waste and differentially heating the feed stream at the second higher temperature program range to cause pyrolysis of different high value monomeric constituents; and separating the different high value monomeric constituents.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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