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, Kansas City, MO (United States)
- 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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Related Subjects
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
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