US2011146140A1PendingUtilityA1
Low water biomass-derived pyrolysis oil and processes for preparing the same
Est. expiryDec 23, 2029(~3.4 yrs left)· nominal 20-yr term from priority
C10L 1/02B01D 3/36
63
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Claims
Abstract
Low water-containing biomass-derived pyrolysis oils and processes for preparing them are provided. Water-containing biomass-derived pyrolysis oil is distilled in the presence of an azeotrope-forming liquid to form an azeotrope. The azeotrope is removed at or above the boiling point of the azeotrope and low water biomass-derived pyrolysis oil is obtained.
Claims
exact text as granted — not AI-modified1 . A process for reducing water in a water-containing biomass-derived pyrolysis oil comprising the steps of:
distilling the water-containing biomass-derived pyrolysis oil in the presence of an azeotrope-forming liquid to form an azeotrope; and removing the azeotrope.
2 . The process of claim 1 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil comprises selecting the azeotrope-forming liquid from the group consisting of toluene, ethanol, acetone, 2-propanol, cyclohexane, 2-butanone, octane, benzene, and ethyl acetate.
3 . The process of claim 2 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil comprises forming the azeotrope selected from the group consisting of ethanol/water, toluene/water, acetone/water, 2-propanol/water, cyclohexane/water, 2-butanone/water, octane/water, ethanol/toluene/water, 1-butanol/octane/water, benzene/2-propanol/water, ethanol/2-butanone/water, and ethanol/ethyl acetate/water.
4 . The process of claim 1 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil comprises heating the water-containing biomass-derived pyrolysis oil to a minimum distillation temperature of the boiling point of the azeotrope at a given atmospheric pressure.
5 . The process of claim 1 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil comprises adding the azeotrope-forming liquid to the water-containing biomass-derived pyrolysis oil, a minimum amount of the azeotrope-forming liquid to be added (in kilograms) calculated according to the following calculations:
x
=
weight
ratio
of
azeotrope
-
forming
liquid
to
water
in
azeotrope
mass
(
in
kilograms
)
of
water
to
be
removed
from
biomass
-
derived
pyrolysis
oil
Minimum
amount
of
azeotrope
-
forming
liquid
to
be
added
(
in
kilograms
)
to
the
starting
oil
wherein the mass (in kg) of water to be removed=M f *([H 2 O] i −[H 2 O] f )/(1−[H 2 O] f ); and
wherein:
M f =mass of water-containing biomass-derived pyrolysis oil (in kilograms); and [H 2 O] i and [H 2 O] f =water concentration in grams of water per gram of oil of the initial (water-containing biomass-derived pyrolysis oil) and final pyrolysis oil (low water biomass-derived pyrolysis oil) respectively.
6 . The process of claim 5 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil further comprises adding more of the azeotrope-forming liquid to the water-containing biomass-derived pyrolysis oil than the minimum amount.
7 . The process of claim 1 , wherein the step of distilling the water-containing biomass-derived pyrolysis oil in the presence of an azeotrope-forming liquid comprises distilling the water-containing biomass-derived pyrolysis oil in the presence of a first azeotrope-forming liquid and a second azeotrope-forming liquid.
8 . A process for preparing low water biomass-derived pyrolysis oil comprising the steps of:
introducing biomass-derived pyrolysis oil and an azeotrope-forming liquid into a distillation apparatus maintained at a temperature sufficient to form an azeotrope, the temperature being at least the minimum boiling point of the azeotrope; removing the azeotrope from the distillation apparatus at or above the boiling point of the azeotrope; and removing low water biomass-derived pyrolysis oil from the distillation apparatus.
9 . The process of claim 8 , wherein the step of introducing the biomass-derived pyrolysis oil and the azeotrope-forming liquid comprises selecting the azeotrope-forming liquid from the group consisting of toluene, ethanol, acetone, 2-propanol, cyclohexane, 2-butanone, octane, benzene, and ethyl acetate.
10 . The process of claim 9 , wherein the step of removing the azeotrope comprises removing the azeotrope selected from the group consisting of ethanol/water, toluene/water, acetone/water, 2-propanol/water, cyclohexane/water, 2-butanone/water, octane/water, ethanol/toluene/water, 1-butanol/octane/water, benzene/2-propanol/water, ethanol/2-butanone/water, and ethanol/ethyl acetate/water.
11 . The process of claim 8 , wherein the step of introducing biomass-derived pyrolysis oil and the azeotrope-forming liquid comprises the step of adding the azeotrope-forming liquid to the biomass-derived pyrolysis oil, the distillation apparatus, or a combination thereof.
12 . The process of claim 11 , wherein the step of adding the azeotrope-forming liquid comprises adding the azeotrope-forming liquid in at least an amount calculated according to the following calculations:
x
=
weight
ratio
of
azeotrope
-
forming
liquid
to
water
in
azeotrope
mass
(
in
kilograms
)
of
water
to
be
removed
from
biomass
-
derived
pyrolysis
oil
Minimum
amount
of
azeotrope
-
forming
liquid
to
be
added
(
in
kilograms
)
to
the
starting
oil
wherein the mass (in kg) of water to be removed=M f *([H 2 O] i −[H 2 O] f )/(1−[H 2 O] f ); and
wherein:
M f =mass of water-containing biomass-derived pyrolysis oil (in kilograms); and [H 2 O] i and [H 2 O] f =water concentration in grams of water per gram of oil of the initial (water-containing biomass-derived pyrolysis oil) and final pyrolysis oil (low water biomass-derived pyrolysis oil) respectively.
13 . A low water biomass-derived pyrolysis oil produced by a process which comprises the steps of:
distilling water-containing biomass-derived pyrolysis oil in the presence of an azeotrope-forming liquid to form an azeotrope; and removing the azeotrope and obtaining low water biomass-derived pyrolysis oil, the low water biomass-derived pyrolysis oil having a water content less than the water-containing biomass-derived pyrolysis oil and containing residual azeotrope-forming liquid.
14 . The low water biomass-derived pyrolysis oil of claim 13 , wherein the azeotrope-forming liquid is selected from the group consisting of toluene, ethanol, acetone, 2-propanol, cyclohexane, 2-butanone, octane, benzene, and ethyl acetate.
15 . The low water biomass-derived pyrolysis oil of claim 14 , wherein the azeotrope is selected from the group consisting of ethanol/water, toluene/water, acetone/water, 2-propanol/water, cyclohexane/water, 2-butanone/water, octane/water, ethanol/toluene/water, 1-butanol/octane/water, benzene/2-propanol/water, ethanol/2-butanone/water, and ethanol/ethyl acetate/water.
16 . The low water biomass-derived pyrolysis oil of claim 13 , wherein the azeotrope-forming liquid is present in at least an amount calculated according to the following calculations:
x
=
weight
ratio
of
azeotrope
-
forming
liquid
to
water
in
azeotrope
mass
(
in
kilograms
)
of
water
to
be
removed
from
biomass
-
derived
pyrolysis
oil
Minimum
amount
of
azeotrope
-
forming
liquid
present
(
in
kilograms
)
in
the
starting
oil
wherein the mass (in kg) of water to be removed=M f *([H 2 O] i −[H 2 O] f )/(1−[H 2 O] f ); and
wherein:
M f =mass of water-containing biomass-derived pyrolysis oil (in kilograms); and [H 2 O] i and [H 2 O] f =water concentration in grams of water per gram of oil of the initial (water-containing biomass-derived pyrolysis oil) and final pyrolysis oil (low water biomass-derived pyrolysis oil) respectively.
17 . The low water biomass-derived pyrolysis oil of claim 13 , wherein the azeotrope is removed at or above the boiling point of the azeotrope at a given atmospheric pressure.Join the waitlist — get patent alerts
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