U.S. patent application number 17/264729 was filed with the patent office on 2022-06-09 for silver corrosion inhibitor composition and method of use.
The applicant listed for this patent is BL Technologies, Inc. Invention is credited to Moshood ADEWALE, Hitesh Ghanshyam BAGARIA, Ronald GROPP, Roberto GUTIERREZ.
Application Number | 20220177797 17/264729 |
Document ID | / |
Family ID | |
Filed Date | 2022-06-09 |
United States Patent
Application |
20220177797 |
Kind Code |
A9 |
GUTIERREZ; Roberto ; et
al. |
June 9, 2022 |
SILVER CORROSION INHIBITOR COMPOSITION AND METHOD OF USE
Abstract
A synergistic fuel additive composition, the composition having
a sulfur additive; and a non-sulfur containing additive, wherein
the ratio of the sulfur additive to the non-sulfur additive is
about 1:1 to about 1:100. A method of reducing sulfur content in a
fuel composition, the method provides adding a fuel additive to a
fuel composition, the fuel composition having a silver corrosion
inhibitor, the fuel additive having: a sulfur additive and a
non-sulfur containing additive, wherein the ratio of the sulfur
additive to the non-sulfur containing additive is from about 1:1 to
about 1:100; wherein the fuel additive provides less than 5 ppm of
sulfur addition to the fuel composition; and wherein the fuel
composition does not cause silver corrosion.
Inventors: |
GUTIERREZ; Roberto; (The
Woodlands, TX) ; BAGARIA; Hitesh Ghanshyam; (The
Woodlands, TX) ; ADEWALE; Moshood; (The Woodlands,
TX) ; GROPP; Ronald; (The Woodlands, TX) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BL Technologies, Inc |
Minnetonka |
MN |
US |
|
|
Prior
Publication: |
|
Document Identifier |
Publication Date |
|
US 20210301214 A1 |
September 30, 2021 |
|
|
Appl. No.: |
17/264729 |
Filed: |
August 9, 2018 |
PCT Filed: |
August 9, 2018 |
PCT NO: |
PCT/US2018/046068 PCKC 00 |
371 Date: |
January 29, 2021 |
International
Class: |
C10L 10/04 20060101
C10L010/04; C10L 1/188 20060101 C10L001/188; C10L 1/24 20060101
C10L001/24 |
Claims
1. A synergistic fuel additive composition, the composition
comprising: a sulfur additive; and a non-sulfur containing
additive, wherein the ratio of the sulfur additive to the
non-sulfur additive is about 1:1 to about 1:100, wherein the sulfur
additive comprises the formula ##STR00006## wherein R1 and R2 are
independently selected from a 4-20 carbon alkyl thiol forming
disulfide bond, a hydrogen, and a 4-20 carbon hydrocarbyl group,
and wherein the non-sulfur containing additive comprises a
plurality of fatty acids from C8 to C22 monocarboxylic acids and/or
C8 to C22 dicarboxylic acid or anhydrides.
2-4. (canceled)
5. The fuel additive composition as recited in claim 1, wherein the
fuel additive composition reduces sulfur content in a fuel
composition by at least 50%.
6-13. (canceled)
14. A method of reducing sulfur content in a fuel composition, the
method comprising: adding a fuel additive to a fuel composition,
the fuel composition requiring a silver corrosion inhibitor, the
fuel additive comprising: a sulfur additive and a non-sulfur
containing additive, wherein the ratio of the sulfur additive to
the non-sulfur containing additive is from about 1:1 to about
1:100; wherein the fuel additive provides less than 5 ppm of sulfur
addition to the fuel composition; and wherein the fuel composition
does not cause silver corrosion.
15. The method as recited in claim 14, wherein the sulfur additive
comprises the formula ##STR00007## wherein R1 and R2 are
independently selected from a C4 to C20 carbon alkyl thiol forming
disulfide bond, a hydrogen, and a C4 to C20 carbon hydrocarbyl
group.
16. The method as recited in claim 14, wherein the non-sulfur
containing additive comprises a plurality of fatty acids from C8 to
C22 monocarboxylic acids, and/or C8 to C22 dicarboxylic acids or
anhydrides.
17. The method as recited in claim 16, wherein the fatty acids
comprise alkenyl or alkyl succinic acids.
18. The method as recited in claim 17, wherein the alkenyl or alkyl
succinic acids comprise dodecenyl succinic acid or dodecyl succinic
acid.
19. The method as recited in claim 16, wherein the fatty acids
comprise alkenyl or alkyl succinic anhydrides.
20. The method as recited in claim 19, wherein the alkenyl or alkyl
succinic anhydride comprise dodecenyl succinic anhydride or dodecyl
succinic anhydride.
21. The method as recited in claim 16, wherein the fatty acids
comprise monocarboxylic acids.
22. The method as recited in claim 21, wherein the monocarboxylic
acids comprise oleic acid, linoleic acid, or linolenic acid.
23. The method as recited in claim 14, wherein the fuel additive
provides less than 2 ppm of sulfur addition.
24. The method as recited in claim 14, wherein the fuel additive
provides less than 0.50 ppm of sulfur addition.
25. The method as recited in claim 14, wherein the fuel additive
provides less than 0.1 ppm of sulfur addition.
Description
FIELD OF INVENTION
[0001] The disclosed technology generally described hereinafter
provides for a synergistic fuel additive composition, and more
specifically, a synergistic fuel additive composition and method of
reducing sulfur content, where the fuel additive decreases sulfur
content while still meeting silver corrosion specifications.
BACKGROUND OF THE INVENTION
[0002] Generally, spark ignition fuels, commonly referred to as
gasoline, have silver corrosion and sulfur specifications that must
be met by refiners and importers prior to introducing gasoline into
commerce. In some cases, refinery processing units fail to remove
trace contaminants that prevent the gasoline from meeting the
silver corrosion specification such as the one contained in the
ASTM D4814, Standard Specification for Automotive Spark-Ignition
Engine Fuel.
[0003] In many of these cases, refiners and gasoline importers turn
to corrosion inhibitor additives to help meet the specification.
The industry workhorse silver corrosion inhibitor, alkyl
dithiothiadiazole, contains sulfur and typically introduces several
ppm of sulfur into treated gasoline. As such, the treated gasoline
meets corrosion specifications, but may not meet sulfur regulations
such as those found in the U.S. EPA's Tier 3 Gasoline Sulfur
Regulations. Failure to meet the sulfur regulations can result in
costly penalties in the form of sulfur credit purchases from other
refiners and/or importers, where such sulfur credit purchases can
potentially cost millions of dollars.
SUMMARY OF THE INVENTION
[0004] The disclosed technology generally described hereinafter
provides for synergistic fuel additive composition and method of
reducing sulfur content in a fuel composition, where the fuel
additive decreases sulfur content while still meeting silver
corrosion specifications.
[0005] In one aspect of the disclosed technology, a synergistic
fuel additive composition is provided. The synergistic fuel
additive composition, the composition comprising: a sulfur
additive; and a non-sulfur containing additive, wherein the ratio
of the sulfur additive to the non-sulfur additive is about 1:1 to
about 1:100.
[0006] In some embodiments, the sulfur additive comprises the
formula
##STR00001##
wherein R1 and R2 are independently selected from a 4-20 carbon
alkyl thiol forming disulfide bond, a hydrogen, and a 4-20 carbon
hydrocarbyl group.
[0007] In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids from C8 to C22 monocarboxylic
acids and/or C8 to C22 dicarboxylic acid or anhydrides. In some
embodiments, the composition does not cause silver corrosion. In
some embodiments, the fuel additive composition reduces sulfur
content in a fuel composition by at least 50%.
[0008] In another aspect of the disclosed technology, a method of
reducing sulfur content in a fuel composition is provided. The
method comprising: adding a fuel additive to a fuel composition,
the fuel composition requiring a silver corrosion inhibitor,
wherein the fuel additive provides less than 5 ppm of sulfur
addition.
[0009] In some embodiments, the fuel additive comprises a sulfur
additive and a non-sulfur containing additive. In some embodiments,
the ratio of the sulfur additive to the non-sulfur additive is from
about 1:1 to about 1:100.
[0010] In some embodiments, the sulfur additive comprises the
formula
##STR00002##
wherein R1 and R2 are independently selected from a 4-20 carbon
alkyl thiol forming disulfide bond, a hydrogen, and a 4-20 carbon
hydrocarbyl group.
[0011] In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids from C8 to C22 monocarboxylic
acids. In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids from C8 to C22 dicarboxylic
acid or anhydrides. In some embodiments, the fuel additive provides
less than 2 ppm of sulfur addition. In some embodiments, the fuel
additive provides less than 0.50 ppm of sulfur addition.
[0012] In yet another aspect of the present technology, a method of
reducing sulfur content in a fuel composition is provided. The
method comprising: adding a fuel additive to a fuel composition,
the fuel composition requiring a silver corrosion inhibitor, the
fuel additive comprising: a sulfur additive and a non-sulfur
containing additive, wherein the ratio of the sulfur additive to
the non-sulfur containing additive is from about 1:1 to about
1:100; wherein the fuel additive provides less than 5 ppm of sulfur
addition to the fuel composition; and wherein the fuel composition
does not cause silver corrosion.
[0013] In some embodiments, the sulfur additive comprises the
formula
##STR00003##
wherein R1 and R2 are independently selected from a C4 to C20
carbon alkyl thiol forming disulfide bond, a hydrogen, and a C4 to
C20 carbon hydrocarbyl group.
[0014] In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids from C8 to C22 monocarboxylic
acids and/or C8 to C22 dicarboxylic acid or anhydrides. In some
embodiments, the fatty acids comprise alkenyl or alkyl succinic
acids. In some embodiments, the alkenyl or alkyl succinic acids
comprise dodecenyl succinic acid or dodecyl succinic acid.
[0015] In some embodiments, the fatty acids comprise alkenyl or
alkyl succinic anhydrides. In some embodiments, the alkenyl or
alkyl succinic anhydride comprise dodecenyl succinic anhydride or
dodecyl succinic anhydride. In some embodiments, the fatty acids
comprise monocarboxylic acids. In some embodiments, the
monocarboxylic acids comprise oleic acid, linoleic acid, or
linolenic acid.
[0016] In some embodiments, the fuel additive provides less than 2
ppm of sulfur addition. In some embodiments, the fuel additive
provides less than 0.50 ppm of sulfur addition. In some
embodiments, the fuel additive provides less than 0.1 ppm of sulfur
addition.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] These and other features of the disclosed technology, and
the advantages, are illustrated specifically in embodiments now to
be described, by way of example, with reference to the accompanying
diagrammatic drawings, in which:
[0018] FIG. 1 is a table providing results of an illustrative
embodiment of the disclosed technology.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0019] The disclosed technology generally described hereinafter
provides for a fuel additive composition. The fuel additive
composition provides for a synergistic effect of reducing the
amount of sulfur addition to a fuel composition, yet still meets
the silver corrosion specification requirements required by the
U.S. EPA and potentially other regulatory entities. By using the
fuel additive composition of the present invention, the amount of
sulfur addition is significantly lowered, while still exhibiting
improved performance in accordance with ASTM D7671 and/or ASTM
D7667 test methods.
[0020] The synergistic fuel additive composition comprises a sulfur
additive and a non-sulfur containing additive. In some embodiments,
the ratio of the sulfur additive to the non-sulfur additive is from
about 1:1 to about 1:100.
[0021] In some embodiments, the sulfur additive comprises the
formula (I)
##STR00004##
wherein R1 and R2 are independently selected from a 4-20 carbon
alkyl thiol forming disulfide bond, a hydrogen, and a 4-20 carbon
hydrocarbyl group.
[0022] In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids from C8 to C22 monocarboxylic
acids and/or C8 to C22 dicarboxylic acid or anhydrides. In some
embodiments, the non-sulfur containing additive comprises a
plurality of fatty acids or anhydrides having between C8 to C22
with either one or two carboxylic acid groups, and in other
embodiments, having between C8 to C18 succinic acids or
anhydrides.
[0023] In some embodiments, the plurality of fatty acids comprise
alkenyl or alkyl succinic acids or anhydrides, such as, but are not
limited to, dodecenyl succinic acid or anhydride (DDSA), dodecyl
succinic acid or anhydride, hexadecenyl succinic acid or anhydride,
hexadecyl succinic acid or anhydride. In other embodiments, the
plurality of fatty acids comprise monocarboxylic acids, such as,
but are not limited to, oleic acid, linoleic acid, and/or linolenic
acid.
[0024] In some embodiments, the non-sulfur containing additive is
dodecenyl succinic acid or anhydride (DDSA), or a Tall oil Fatty
Acid (TOFA). In some embodiments, the non-sulfur containing
additive comprises a plurality of fatty acids having between C8 to
C22 with either one or two carboxylic acid groups. In some
embodiments, the synergistic fuel additive composition comprises
alkyl dithiothiadiazole and dodecenyl succinic acid (DDSA) or
TOFA.
[0025] The synergistic fuel additive composition of the disclosed
technology does not cause silver corrosion. In some embodiments,
the synergistic fuel additive composition reduces sulfur content in
a fuel composition by at least 50%, and in other embodiments, by at
least 80%.
[0026] The fuel additive composition of the disclosed technology
allows for the synergistic effect of decreasing the sulfur content
of a fuel composition by at least 80% to produce a passing rate of
about 1 (based on ASTM D7667 or ASTM D7671 test methods for silver
corrosiveness), while being able to simultaneously decrease the
treatment dose. By reducing the treatment dose, the amount of
sulfur provided in the finished blend will be reduced.
[0027] In some embodiments, the fuel additive composition is added
to a fuel composition in a treatment dosage of about 10 ppmv. By
decreasing the treatment dose of the fuel additive composition,
refiners will be able to meet the required sulfur specifications
without incurring regulatory penalties for going beyond the sulfur
limit.
[0028] In other embodiments, the fuel additive composition is added
to a fuel composition in a treatment dosage of between about 10 and
about 80 ppmv. It should be understood by a person of ordinary
skill that other dosage amounts may be necessary to pass the
required corrosion specification.
[0029] In some embodiments, the treatment dosage of the fuel
additive composition when added to a fuel can be reduced by at
least 50%.
[0030] In yet another embodiment of the disclosed technology, a
method of reducing sulfur content in a fuel composition is
provided. The method comprises adding a fuel additive to a fuel
composition comprising a silver corrosion inhibitor, wherein the
fuel additive provides less than 5 ppm. It should be understood by
one skilled in the art that sulfur addition is defined as a
byproduct of typical silver corrosion inhibition products that tend
to have sulfur species in them. As the dosage of the inhibitor
increases to protect from corrosion, the total amount of sulfur in
the fuel is increased. Due to tightening government regulations,
which continue to decrease the amount sulfur that is acceptable in
a fuel product, a successful fuel additive should provide low
sulfur addition.
[0031] In other embodiments, the fuel additive provides less than 2
ppm of sulfur addition, in other embodiments, less than 1 ppm of
sulfur addition, in other embodiments, less than 0.50 ppm of sulfur
addition, and in other embodiments, less than 0.1 ppm of sulfur
addition.
[0032] In some embodiments, the fuel composition comprises
gasoline, or gasoline blends, as defined by ASTM D4814. In some
embodiments, the fuel additive of the present method comprises a
sulfur additive and a non-sulfur containing additive. In some
embodiments, the sulfur additive, as previous described, comprises
the formula (I) below,
##STR00005##
wherein R1 and R2 are independently selected from a 4-20 carbon
alkyl thiol forming disulfide bond, a hydrogen, and a 4-20 carbon
hydrocarbyl group.
[0033] In some embodiments, the non-sulfur containing additive
comprises a plurality of fatty acids having between C8 to C22 with
either one or two carboxylic acid groups. In some embodiments, the
non-sulfur containing additive comprises a plurality of fatty acids
having between C8 to C18 with either one or two carboxylic acid
groups.
[0034] In some embodiments, the fatty acids comprise an alkyl
succinic acid or a monocarboxylic acid. In some embodiments, the
fatty acid is dodecenyl succinic acid (DDSA) and/or dodecyl
succinic acid. In some embodiments, the fatty acid comprises
monocarboxylic acids such as, but not limited to, oleic acid,
linoleic acid, and/or linolenic acid.
[0035] In a specific embodiment, a method of reducing sulfur
content in a fuel composition is provided. The method comprising
adding a fuel additive to a fuel composition, the fuel composition
requiring a silver corrosion inhibitor, the fuel additive
comprising: a sulfur additive and a non-sulfur containing additive,
wherein the ratio of the sulfur additive to the non-sulfur
containing additive is from about 1:1 to about 1:100; wherein the
fuel additive provides less than 5 ppm of sulfur addition to the
fuel composition; and wherein the fuel composition does not cause
silver corrosion.
EXAMPLES
[0036] The present invention will be further described in the
following examples, which should be viewed as being illustrative
and should not be construed to narrow the scope of the disclosed
technology or limit the scope to any particular embodiments.
[0037] FIG. 1 provides the Silver Strip Test Results in a
hydrocarbon containing 10 ppmw H.sub.2S liquid.
[0038] As shown in FIG. 1, the standard industry product alkyl
thiothiadiazole (Experiment #3) when used alone exhibits a failing
silver strip corrosion rating of 2, while adding 2.50 ppm of
sulfur. Additionally, when DDSA is used alone (Experiment #2),
while it does not add any additional sulfur, it still does not
provide a passing silver strip rating, (i.e. it does not provide a
silver strip rating of 1).
[0039] However, as shown in comparative examples (Experiment #5-8,
the fuel additive composition of the present technology provides a
synergistic effect. The synergistic fuel additive comprising a
blend of 80% DDSA and 20% alkyl thiothiadiazole exhibited a passing
silver strip corrosion rating of 1, while simultaneously providing
an added sulfur content of between 0.50 ppm and 4.0 ppm.
[0040] While embodiments of the disclosed technology have been
described, it should be understood that the present disclosure is
not so limited and modifications may be made without departing from
the disclosed technology. The scope of the disclosed technology is
defined by the appended claims, and all devices, processes, and
methods that come within the meaning of the claims, either
literally or by equivalence, are intended to be embraced
therein.
* * * * *