US 12,305,135 B2
High octane unleaded aviation gasoline
George W Braly, Ada, OK (US)
Assigned to GENERAL AVIATION MODIFICATIONS, INC., Ada, OK (US)
Filed by GENERAL AVIATION MODIFICATIONS, INC., Ada, OK (US)
Filed on Jan. 7, 2020, as Appl. No. 16/736,253.
Application 16/736,253 is a division of application No. 14/153,950, filed on Jan. 13, 2014, granted, now 10,550,347.
Application 14/153,950 is a continuation in part of application No. 13/841,560, filed on Mar. 15, 2013, granted, now 10,260,016, issued on Apr. 16, 2019.
Application 13/841,560 is a continuation in part of application No. 12/958,390, filed on Dec. 1, 2010, granted, now 8,628,594, issued on Jan. 14, 2014.
Claims priority of provisional application 61/319,255, filed on Mar. 30, 2010.
Claims priority of provisional application 61/316,158, filed on Mar. 22, 2010.
Claims priority of provisional application 61/265,606, filed on Dec. 1, 2009.
Prior Publication US 2020/0277535 A1, Sep. 3, 2020
Int. Cl. C10L 1/223 (2006.01); C10L 1/06 (2006.01); C10L 1/14 (2006.01); C10L 10/10 (2006.01); C10L 1/182 (2006.01)
CPC C10L 1/223 (2013.01) [C10L 1/06 (2013.01); C10L 1/14 (2013.01); C10L 10/10 (2013.01); C10G 2300/304 (2013.01); C10G 2300/305 (2013.01); C10G 2400/02 (2013.01); C10L 1/1824 (2013.01); C10L 2270/023 (2013.01); C10L 2270/04 (2013.01)] 31 Claims
 
1. A high octane unleaded aviation gasoline composition, comprising:
(1) at least one unleaded aviation gasoline base fuel comprising an alkylate having a selected motor octane number of about 96 or more, the base fuel further comprising two or more dialkylbenzenes, the two or more dialkylbenzenes comprising at least two dialkylbenzenes selected from meta-xylene, and para-xylene, and ortho-xylene, wherein the meta-xylene and the para-xylene together comprise no more than about forty five percent (45%) by weight of the high octane unleaded aviation gasoline; and
(2) a concentrate, wherein the high octane unleaded aviation gasoline consists of from about seven point five percent (7.5%) to about fifteen percent (15%) by weight of concentrate, and wherein the concentrate comprises
(a) one or more aromatic solvents, the one or more aromatic solvents comprising at least about forty percent (40%) by weight of the concentrate, but not more than about fifty five percent (55%) by weight of the concentrate, wherein the one or more aromatic solvents comprises toluene;
(b) two or more aromatic amines, the two or more aromatic amines present in the concentrate, collectively, at not less than about thirty percent (30%) by weight, and wherein the two or more aromatic amines comprise para-toluidine and meta-toluidine;
(c) one or more C1 to C3 alcohols, the one or more C1 to C3 alcohols present in the concentrate, collectively, at about twenty percent (20%) or less by weight, wherein the one or more C1 to C3 alcohols comprises any one or more of methanol, ethanol, or isopropyl alcohol; and
(d) wherein octane enhancement provided by the concentrate, in combination with the base fuel is sufficient to provide detonation performance of the high octane unleaded aviation gasoline in an aircraft engine that is equivalent, or better, than detonation performance of Grade 100 LL avgas which meets minimum octane requirements set forth in ASTM Standard D910.