Manganese scavengers that minimize octane loss in aviation gasolines
AssigneeAfton Chemical Corporation
InventorsJoseph Anthony Calderone, III, Zachary John McAfee
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Abstract
Aviation gasolines and additives may have manganese-containing anti-knock components. The scavengers herein mitigate the possible deleterious effects from using the manganese-containing anti-knock. The scavengers include molecules with a central atom of a Group 15 element other than nitrogen. Entities that are attached to the central atom are electron withdrawing entities including electron deficient atoms and electron deficient functional groups.
Claims12
An aviation gasoline formulation comprising:
- gasoline;
- a manganese-containing anti-knock component;
- and
- a manganese scavenger component, wherein the manganese scavenger component comprises molecules made up of a central atom and entities attached to the central atom;
- wherein the central atom is a Group 15 element selected from the group consisting of phosphorous, arsenic, antimony, and bismuth;
- wherein the entities attached to the central atom are electron withdrawing entities selected from the group consisting of electron deficient atoms and electron deficient functional groups;
- wherein the electron withdrawing entity includes a substituted aryl group that is directly attached to the central atom through a carbon bonded to the central atom;
- and
- wherein the substituent on the aryl group is selected from the group consisting of fluorine, chlorine, and bromine;
- wherein the aviation gasoline formulation is lead free.
A method of improving the performance of organomanganese aviation gasoline additive compounds during the combustion of that gasoline in an aviation internal combustion engine, the method comprising the steps of
- providing an gasoline that includes an organomanganese anti-knock compound;
- mixing into the gasoline a manganese scavenging component comprising molecules made up of a central atom and entities attached to the central atom;
- wherein the central atom is a Group 15 element selected from the group consisting of phosphorous, arsenic, antimony, and bismuth;
- wherein the entities attached to the central atom are electron withdrawing entities selected from the group consisting of electron deficient atoms and electron deficient functional groups;
- wherein the electron withdrawing entity includes a substituted aryl group that is directly attached to the central atom through a carbon bonded to the central atom;
- and
- wherein the substituent on the aryl group is selected from the group consisting of fluorine, chlorine, and bromine;
- wherein the aviation gasoline formulation is lead free.
Dependencies are inferred from the claim text.