Carbon Neutrality,
Journal Year:
2024,
Volume and Issue:
3(1)
Published: June 3, 2024
Abstract
Catalytic
hydrogenolysis
systems
of
C-O
bonds
in
furan
ring,
tetrahydrofuran
ring
and
tetrahydropyran
biomass-derived
cyclic
compounds
are
reviewed.
Furfural
or
its
hydrogenation
products
(furfuryl
alcohol
tetrahydrofurfuryl
alcohol)
have
been
frequently
used
as
substrates
for
this
type
reactions.
Ring-opening
furfuryl
over
metal
catalysts
combined
with
basic
components
gives
a
mixture
1,2-pentanediol,
1,5-pentanediol
other
by-products.
The
selectivity
much
depends
on
reaction
conditions,
good
1,2-pentanediol
can
be
obtained.
For
synthesis,
more
selective
approaches
reported
such
Cu-zeolite
flow
reactor
M-M’O
x
-type
(M:
noble
metal;
M’:
transition
metal)
supported
Ni-LnO
(Ln:
rare
earth
element)
hydrogenolysis.
applied
to
ring-opening
furan-
tetrahydrofuran-based
compounds,
respectively.
Among
the
seems
most
important
because
potential
use
monomer.
recent
progress
properties
polymers
using
monomer
also
summarized.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(2), P. 442 - 442
Published: Jan. 16, 2024
Vanillin,
one
of
the
most
widely
used
and
appreciated
flavoring
agents
worldwide,
is
main
constituent
vanilla
bean
extract,
obtained
from
seed
pods
various
members
belonging
to
Orchidaceae
family.
Due
great
demand
in
food
confectionery
industry,
as
well
perfume
medicine,
more,
majority
vanillin
today
produced
synthetically,
only
less
than
percent
world’s
market
comes
directly
traditional
natural
sources.
The
increasing
global
for
requires
alternative
overall
sustainable
new
production
methods,
recovery
biobased
polymers,
like
lignin,
an
environmentally
friendly
chemical
synthesis.
present
review
provides
firstly
overview
different
types
vanillin,
followed
by
a
description
differences
between
synthetic
their
preparation,
interest,
authentication
issues
related
analytical
techniques.
Then,
explores
real
potentialities
lignin
production,
presenting
well-assessed
classical
methods
moving
towards
recent
promising
approaches
through
chemical,
biotechnological
photocatalytic
methodologies,
together
with
challenges
principal
associated
each
technique.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(46), P. 25450 - 25462
Published: Nov. 9, 2023
Finding
new
chemistry
platforms
for
easily
recyclable
polymers
has
become
a
key
challenge
to
face
environmental
concerns
and
the
growing
plastics
demand.
Here,
we
report
dynamic
between
CO2-sourced
alkylidene
oxazolidones
thiols,
delivering
circular
non-isocyanate
polyurethane
networks
embedding
N,S-acetal
bonds.
The
production
of
oxazolidone
monomers
from
CO2
is
facile
scalable
starting
cheap
reagents.
Their
copolymerization
with
polythiol
occurs
under
mild
conditions
in
presence
catalytic
amount
acid
furnish
polymer
networks.
structure
tuned
by
virtue
monomer
design,
translating
into
wide
panel
mechanical
properties
similar
commodity
plastics,
ranging
PDMS-like
elastomers
[with
Young's
modulus
(E)
2.9
MPa
elongation
at
break
(εbreak)
159%]
polystyrene-like
rigid
(with
E
=
2400
MPa,
εbreak
3%).
highly
dissociative
nature
bonds
demonstrated
exploited
offer
three
different
recycling
scenarios
thermosets:
(1)
compression
molding,
extrusion,
or
injection
molding─with
multiple
(at
least
10
times)
without
any
material
property
deterioration,
(2)
chemical
through
depolymerization,
followed
repolymerization,
also
applicable
composites,
(3)
upcycling
two
oxazolidone-based
thermosets
single
one
distinct
properties.
This
work
highlights
platform
designing
containing
elusive
motifs.
versatility
this
shows
great
potential
preparation
materials
(including
composites)
tuneable
structures
properties,
end-of-life
scenarios.
Annual Review of Chemical and Biomolecular Engineering,
Journal Year:
2023,
Volume and Issue:
14(1), P. 109 - 140
Published: April 11, 2023
Alternative
polymer
feedstocks
are
highly
desirable
to
address
environmental,
social,
and
security
concerns
associated
with
petrochemical-based
materials.
Lignocellulosic
biomass
(LCB)
has
emerged
as
one
critical
feedstock
in
this
regard
because
it
is
an
abundant
ubiquitous
renewable
resource.
LCB
can
be
deconstructed
generate
valuable
fuels,
chemicals,
small
molecules/oligomers
that
amenable
modification
polymerization.
However,
the
diversity
of
complicates
evaluation
biorefinery
concepts
areas
including
process
scale-up,
production
outputs,
plant
economics,
life-cycle
management.
We
discuss
aspects
current
research
a
focus
on
major
stages,
selection,
fractionation/deconstruction,
characterization,
along
product
purification,
functionalization,
polymerization
manufacture
macromolecular
highlight
opportunities
valorize
underutilized
complex
feedstocks,
leverage
advanced
characterization
techniques
predict
manage
increase
fraction
converted
into
products.
Catalysis Communications,
Journal Year:
2023,
Volume and Issue:
182, P. 106740 - 106740
Published: July 25, 2023
Glucaric
acid
and
gluconic
acid,
compounds
with
diverse
applications,
have
market
values
projected
to
reach
$1.4
billion
$1.9
by
2028,
respectively.
The
one-pot
glucose
oxidation
glucaric
the
two-step,
partial
present
options
for
developing
a
new
industrial
process.
This
study
demonstrates
that
gold
catalysts
can
efficiently
produce
under
basic
pH
conditions
mild
temperature
pressure
conditions.
In
contrast,
platinum
effectively
generate
through
reaction,
achieving
yields
of
up
82%
mol
at
slightly
levels,
high
oxygen
pressures,
temperatures
353
K.
article
proposes
using
two
reactors
in
series
enhance
yield
efficiency.
first
reactor
would
partially
oxidize
while
second
facilitate
reaction
obtain
acid.
Overall,
this
offers
valuable
insights
into
these
significant
acids'
potential
production.
