Back to results
US 12,043,808 B2Granted
Quaternary ammonium salt combinations for injector cleanliness
AssigneeAfton Chemical Corporation
InventorScott D. Schwab
Life of this patent
Estimating the term…
Abstract
The present disclosure provides fuel additives including quaternary ammonium salt mixtures, fuel compositions including such additives, and methods of improving performance of fuel injector using such additives.
Claims7
A method of providing improved engine performance, the method comprising:
- providing a fuel composition to an engine and combusting the fuel composition in the engine;
- the fuel composition including a major amount of fuel and a minor amount of a deposit control mixture, the deposit control mixture including 5 to 15 ppm of a first quaternary ammonium salt additive and about 15 to 40 ppm of a second quaternary ammonium salt additive, the deposit control mixture including no more than 50 weight percent of the first quaternary ammonium salt additive;
- wherein the first quaternary ammonium salt additive has the structure of Formula II
- R4—C(O)—N(R6)—R—N⨣(R5)(R5)—R′—C(O)O{circumflex over (−)} (Formula II)
- wherein R4 is a C8 to C20 hydrocarbyl group, each of R and R′ are independently alkylene linkers having 1 to 3 carbon atoms, each R5 is a methyl group, and R6 is hydrogen;
- the second quaternary ammonium salt additive has the structure of Formula III
- [(R10)(R11)N—(CH2)n—Xm—(CH2)n—Xm—(CH2)n—N⨣(R7)(R8)(R9)]{circumflex over (−)} (Formula III)
- wherein each X is an oxygen atom;
- each R7, R8, and R9 are independently alkyl groups containing 1 to 8 carbon atoms;
- wherein R10 and R11 of Formula III, together with the nitrogen atom to which they are attached, combine to form a hydrocarbyl substituted succinimide with the hydrocarbyl substituent having a number average molecular weight of about 700 to about 1,500 as measured by GPC using polystyrene as a calibration reference;
- each m is independently an integer of 0 or 1 with at least one m being 1;
- each n is independently an integer of 1 to 10;
- and MΘ is a oxalate, salicylate, or combinations thereof;
- wherein the deposit control mixture includes a ratio of the first quaternary ammonium salt additive to the second quaternary ammonium salt additive of 1:1 to 1:8;
- and
- wherein the fuel composition includes no more than about 100 ppmw of the deposit control mixture including both the first and second quaternary ammonium salt additives.
13 more elements
A fuel composition including a deposit control additive mixture for providing improved engine performance, the fuel composition comprising:
- a major amount of fuel and a minor amount of a deposit control additive mixture including at least 5 to 15 ppm of a first quaternary ammonium salt additive and 15 to 40 ppm of a second quaternary ammonium salt additive, wherein the deposit control additive mixture includes no more than 50 weight percent of the first quaternary ammonium salt additive;
- wherein the first quaternary ammonium salt additive has the structure of Formula II
- R4—C(O)—N(R6)—R—N⨣(R5)(R5)—R′—C(O)O{circumflex over (−)} (Formula II)
- wherein R4 is a C8 to C20 hydrocarbyl group, each of R and R′ are independently alkylene linkers having 1 to 3 carbon atoms, each R5 is a methyl group, and R6 is hydrogen;
- the second quaternary ammonium salt additive has the structure of Formula III
- [(R10)(R11)N—(CH2)n—Xm—(CH2)n—Xm—(CH2)n—N⨣(R7)(R8)(R9)]{circumflex over (−)} (Formula III)
- wherein each X is an oxygen atom;
- each R7, R8, and R9 are independently alkyl groups containing 1 to 8 carbon atoms;
- wherein R10 and R11 of Formula III, together with the nitrogen atom to which they are attached, combine to form a hydrocarbyl substituted succinimide with the hydrocarbyl substituent having a number average molecular weight of about 700 to about 1,500 as measured by GPC using polystyrene as a calibration reference;
- each m is independently an integer of 0 or 1 with at least one m being 1;
- each n is independently an integer of 1 to 10;
- and MΘ is a carboxylate oxalate, salicylate, or combinations thereof;
- wherein the deposit control additive mixture provides a weight ratio of the first quaternary ammonium salt additive to the second quaternary ammonium salt additive of 1:1 to 1:8;
- and
- wherein the fuel composition includes no more than about 100 ppmw of the deposit control additive mixture including both the first and second quaternary ammonium salt additives.
12 more elements
Dependencies are inferred from the claim text.