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