Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
- Lakewood, CO
- Arvada, CO
A process of using fast pyrolysis in a carrier gas to convert a plastic waste feedstream having a mixed polymeric composition in a manner such that pyrolysis of a given polymer to its high value monomeric constituent occurs prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of said given polymer to its high value monomeric constituent prior to a temperature range that causes pyrolysis of other plastic components; selecting a catalyst and support for treating said feed streams with said catalyst to effect acid or base catalyzed reaction pathways to maximize yield or enhance separation of said high value monomeric constituent in said temperature program range; differentially heating said 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 constituent prior to pyrolysis of other plastic components; separating the high value monomeric constituents, selecting a second higher temperature range to cause pyrolysis of a different high value monomeric constituent of said plastic waste and differentially heating the feedstream at the higher temperature program range to cause pyrolysis of the different high value monomeric constituent; and separating the different high value monomeric constituent.
- 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 5300704
- OSTI ID:
- 869226
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
catalytic
thermal
sequential
pyrolysis
hydrolysis
mixed
polymer
waste
streams
sequentially
recover
monomers
value
products
process
fast
carrier
gas
convert
plastic
feedstream
polymeric
composition
manner
monomeric
constituent
occurs
prior
components
therein
comprising
selecting
temperature
range
causes
catalyst
support
treating
feed
effect
acid
base
catalyzed
reaction
pathways
maximize
yield
enhance
separation
differentially
heating
stream
heat
rate
provide
differential
selective
recovery
optimum
quantities
separating
constituents
sequentially recover
recover monomers
occurs prior
optimum quantities
sequential pyrolysis
thermal sequential
base catalyzed
mixed polymeric
controlled catalytic
polymer waste
constituent occurs
heat rate
effect acid
waste feedstream
differentially heating
waste feed
polymeric composition
constituent prior
monomeric constituents
components therein
waste stream
carrier gas
temperature range
monomeric constituent
feed stream
value monomeric
plastic components
plastic waste
waste streams
provide differential
enhance separation
maximize yield
feed streams
differential pyrolysis
catalyzed reaction
causes pyrolysis
therein comprising
reaction pathways
selective recovery
fast pyrolysis
mixed polymer
value products
value product
value monomer
reaction pathway
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