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  • High octane unleaded aviation fuel
    Patent number: 8628594
    Abstract: An unleaded aviation fuel blend. The fuel blend is provided by blending an unleaded aviation gasoline base fuel which may include iso-octane and iso-pentane, and an effective amount of a selected alkyl benzene to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Advantageous alkylated benzenes include those having a meta-ring position between alkyl groups. Alkyl groups may be provided at least in part by methyl groups. In an embodiment, the alkyl benzene may include 1,3-dimethylbenzene. In an embodiment, two or more alkylated benzenes may be provided. In an embodiment, 1,3,5-trimethylbenzene may be provided. Suitable alkylated benzenes may include a mixture of xylene isomers. Selected aromatic amines, such as m-toluidine, may also be added to increase motor octane number.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: January 14, 2014
    Inventor: George W. Braly
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20230383205
    Abstract: An unleaded aviation fuel composition meets the requirements of the ASTM D910 specification. Furthermore, the unleaded aviation fuel compositions of the present invention exhibit reduced bladder delamination, improved materials compatibility such as reduced elastomer swelling and reduced paint staining, and improved engine endurance.
    Type: Application
    Filed: October 19, 2021
    Publication date: November 30, 2023
    Inventors: Hanane Belmokaddem BENNIS, Timothy Michael SHEA
  • HIGH OCTANE AVIATION FUEL COMPOSITION
    Publication number: 20120029251
    Abstract: An unleaded aviation fuel composition, containing at least one saturated branched aliphatic hydrocarbon having a carbon number in the C4 to C10 range, further contains sufficient m-xylene to yield a fuel having a MON of at least 98. A process is further provided for producing the unleaded aviation fuel composition by admixing a m-xylene enriched liquid with alkylate.
    Type: Application
    Filed: December 16, 2010
    Publication date: February 2, 2012
    Inventors: Gregory Hemighaus, William Cannella
  • High octane aviation fuel composition
    Patent number: 8324437
    Abstract: An unleaded aviation fuel composition, containing at least one saturated branched aliphatic hydrocarbon having a carbon number in the C4 to C10 range, further contains sufficient m-xylene to yield a fuel having a MON of at least 98. A process is further provided for producing the unleaded aviation fuel composition by admixing a m-xylene enriched liquid with alkylate.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: December 4, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Gregory Hemighaus, William Cannella
  • UNLEADED AVIATION FUEL
    Publication number: 20190062657
    Abstract: The present invention relates to an aviation gasoline composition, its production and its use in a reciprocating spark ignition aircraft engine.
    Type: Application
    Filed: August 28, 2017
    Publication date: February 28, 2019
    Applicant: LANXESS Deutschland GmbH
    Inventors: Alexander HENSELER, Torsten HAUSCHILD
  • Unleaded aviation fuel
    Patent number: 10246659
    Abstract: The present invention relates to an aviation gasoline composition, its production and its use in a reciprocating spark ignition aircraft engine.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: April 2, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Alexander Henseler, Torsten Hauschild
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20150175920
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and CHN content of at least 98 wt %, less than 2 wt % of oxygen content, an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 25, 2015
    Inventors: Timothy Michael SHEA, Trevor James DAVIES, Michael Clifford MACKNAY, Hanane Belmokaddem BENNIS
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20150113866
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and a CHN content of at least 98 wt %, less than 2 wt % of oxygen content, an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa, freezing point is less than ?58° C. is provided.
    Type: Application
    Filed: July 25, 2014
    Publication date: April 30, 2015
    Inventors: Timothy Michael SHEA, Trevor James DAVIES, Michael Clifford MACKNAY, Hanane Belmokaddem BENNIS
  • High octane unleaded aviation gasoline
    Patent number: 9388356
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and CHN content of at least 98 wt %, less than 2 wt % of oxygen content, an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: July 12, 2016
    Assignee: Shell Oil Company
    Inventors: Timothy Michael Shea, Trevor James Davies, Michael Clifford Macknay, Hanane Belmokaddem Bennis
  • High octane unleaded aviation gasoline
    Patent number: 9388357
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and a CHN content of at least 98 wt %, less than 2 wt % of oxygen content, an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa, freezing point is less than ?58° C. is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: July 12, 2016
    Assignee: Shell Oil Company
    Inventors: Timothy Michael Shea, Trevor James Davies, Michael Clifford Macknay, Hanane Belmokaddem Bennis
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20150113865
    Abstract: High octane unleaded aviation fuel composition having high aromatics content and CHN content of at least 97.8 wt %, less than 2.2 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 190° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Application
    Filed: July 25, 2014
    Publication date: April 30, 2015
    Inventors: Timothy Michael SHEA, Michael Clifford MACKNAY, Hanane Belmokaddem BENNIS
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20150113862
    Abstract: High octane unleaded aviation fuel compositions having a CHN content of at least 97.2 wt %, less than 2.8 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 210° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Application
    Filed: July 25, 2014
    Publication date: April 30, 2015
    Inventors: Timothy Michael SHEA, Trevor James DAVIES, Michael Clifford MACKNAY, Hanane Belmokaddem BENNIS
  • High octane unleaded aviation gasoline
    Patent number: 9127225
    Abstract: High octane unleaded aviation fuel composition having high aromatics content and CHN content of at least 97.8 wt %, less than 2.2 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 190° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: September 8, 2015
    Assignee: Shell Oil Company
    Inventors: Timothy Michael Shea, Michael Clifford Macknay, Hanane Belmokaddem Bennis
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20150159106
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and a CHN content of at least 97.2 wt %, less than 2.8 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 190° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa, freezing point is less than ?58° C. is provided.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 11, 2015
    Inventors: Timothy Michael SHEA, Trevor James DAVIES, Michael Clifford MACKNAY, Hanane Belmokaddem BENNIS
  • High octane unleaded aviation gasoline
    Patent number: 9120991
    Abstract: High octane unleaded aviation fuel compositions having a CHN content of at least 97.2 wt %, less than 2.8 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 210° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: September 1, 2015
    Assignee: Shell Oil Company
    Inventors: Timothy Michael Shea, Trevor James Davies, Michael Clifford Macknay, Hanane Belmokaddem Bennis
  • High octane unleaded aviation gasoline
    Patent number: 9035114
    Abstract: High octane unleaded aviation fuel compositions having high aromatics content and a CHN content of at least 97.2 wt %, less than 2.8 wt % of oxygen content, a T10 of at most 75° C., T40 of at least 75° C., a T50 of at most 105° C., a T90 of at most 135° C., a final boiling point of less than 190° C., an adjusted heat of combustion of at least 43.5 MJ/kg, a vapor pressure in the range of 38 to 49 kPa, freezing point is less than ?58° C. is provided.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: May 19, 2015
    Assignee: Shell Oil Company
    Inventors: Timothy Michael Shea, Trevor James Davies, Michael Clifford MacKnay, Hanane Belmokaddem Bennis
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20140128644
    Abstract: An unleaded aviation fuel blend. The fuel blend is provided by blending an unleaded aviation gasoline base fuel which may include iso-octane and iso-pentane, and an effective amount of a selected alkyl benzene to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Advantageous alkylated benzenes include those having a meta-ring position between alkyl groups. Alkyl groups may be provided at least in part by methyl groups. In an embodiment, the alkyl benzene may include 1,3-dimethylbenzene. In an embodiment, two or more alkylated benzenes may be provided. In an embodiment, 1,3,5-trimethylbenzene may be provided. Suitable alkylated benzenes may include a mixture of xylene isomers. Selected aromatic amines, such as m-toluidine, may also be added to increase motor octane number.
    Type: Application
    Filed: January 13, 2014
    Publication date: May 8, 2014
    Inventor: George W. BRALY
  • HIGH OCTANE UNLEADED AVIATION GASOLINE
    Publication number: 20240076568
    Abstract: An unleaded aviation fuel composition with improved octane properties has 20-35 vol. % toluene having a MON of at least 107; 2-10 vol. % aniline; from above 30 to 55 vol % of at least one alkylate or alkylate blend comprising isoparaffins 4-9 carbon atoms, 3-20 vol % C5 isoparaffins, 3-15 vol % C7 isoparaffins, and 60-90 vol % C8 isoparaffins, and less than 1 vol % C10+, based on the alkylate or alkylate blend; at least 8 vol % isopentane, 0.1-10 vol %, straight chain alkyl acetate; and 0.1-10 vol % branched chain alcohol having 4-8 carbon atoms, provided that the branched chain does not contain any t-butyl groups. The volume ratio of straight chain alkyl acetate to branched chain alcohol is in the range of 3:1 to 1:3 and the fuel composition contains less than 1 vol % of C8 aromatics.
    Type: Application
    Filed: February 23, 2022
    Publication date: March 7, 2024
    Inventors: Hanane Belmokaddem BENNIS, Timothy Michael SHEA
  • HIGH OCTANE UNLEADED AVIATION FUEL
    Publication number: 20190062658
    Abstract: Method for manufacture of unleaded aviation gasoline. The method includes blending a high octane alkylate, an effective amount of selected alkyl benzenes and of selected aromatic amines to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Suitable alkylated benzenes may include a mixture of xylene isomers. Selected aromatic amines, such as N-methyl-p-toluidine, may be added to increase MON. The high octane alkylate may be an aviation alkylate, or iso-octane, or both, and may utilize high octane alkylates having a motor octane number of between about ninety-seven (97) and about one hundred (100). Suitable amounts of iso-pentane, n-butane, and iso-butane may be used for providing vapor pressure in a commercially acceptable range.
    Type: Application
    Filed: December 20, 2017
    Publication date: February 28, 2019
    Applicant: GENERAL AVIATION MODIFICATIONS, INC.
    Inventors: George W. BRALY, Alexander HENSELER, Torsten F. HAUSCHILD, Timothy C. ROEHL
  • HIGH OCTANE UNLEADED AVIATION FUEL
    Publication number: 20190062659
    Abstract: Unleaded aviation gasoline. An unleaded aviation gasoline includes a blend of high octane alkylate, an effective amount of selected alkyl benzenes, and selected aromatic amines sufficient to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Suitable alkylated benzenes may include a mixture of xylene isomers. Selected aromatic amines, such as N-methyl-p-toluidine, are used to increase performance. The high octane alkylate may be an aviation alkylate, or iso-octane, or both, and may utilize high octane alkylates having a motor octane number of between about ninety-seven (97) and about one hundred (100). Suitable amounts of iso-pentane, n-butane, and iso-butane may be used for providing vapor pressure in a commercially acceptable range.
    Type: Application
    Filed: December 20, 2017
    Publication date: February 28, 2019
    Applicant: GENERAL AVIATION MODIFICATIONS, INC.
    Inventors: George W. Braly, Alexander Henseler, Torsten F. Hauschild, Timothy C. Roehl
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