Controlled catalytic and thermal sequential pyrolysis and hydrolysis of polymer waste comprising nylon 6 and a polyolefin or mixtures of polyolefins 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; National Renewable Energy Laboratory (NREL), Golden, CO
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-83CH10093
- Assignee:
- Midwest Research Institute (Kansas City, MO)
- Patent Number(s):
- US 5359061
- OSTI ID:
- 869577
- Country of Publication:
- United States
- Language:
- English
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Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products
Related Subjects
acid
base
base catalyzed
carrier
carrier gas
catalyst
catalytic
catalyzed
catalyzed reaction
causes
causes pyrolysis
components
components therein
composition
comprising
constituent
constituent occurs
constituent prior
constituents
controlled
controlled catalytic
convert
differential
differential pyrolysis
differentially
differentially heating
effect
effect acid
enhance
enhance separation
fast
fast pyrolysis
feed
feed stream
feed streams
feedstream
gas
heat
heat rate
heating
hydrolysis
manner
maximize
maximize yield
mixed
mixed polymer
mixed polymeric
mixtures
monomeric
monomeric constituent
monomeric constituents
monomers
nylon
occurs
occurs prior
optimum
optimum quantities
pathways
plastic
plastic components
plastic waste
polymer
polymer waste
polymeric
polymeric composition
polyolefin
polyolefins
prior
process
products
provide
provide differential
pyrolysis
quantities
range
rate
reaction
reaction pathway
reaction pathways
recover
recover monomers
recovery
selecting
selective
selective recovery
separating
separation
sequential
sequential pyrolysis
sequentially
sequentially recover
stream
streams
support
temperature
temperature range
therein
therein comprising
thermal
thermal sequential
treating
value
value monomer
value monomeric
value product
value products
waste
waste comprising
waste feed
waste feedstream
yield