Patent ID: 7097771

Claim:
A device for delivering at least one fuel additive to a fuel upon immersion in the fuel, said device comprising an ion-exchange resin having an equilibrium constant whereby ion exchange occurs in response to chemical equilibrium forces sufficient to effectuate an exchange, and to which a fuel additive is reversibly bound by a chemical interaction, wherein the ion-exchange resin is selected from the group consisting of anionic exchange resins and cationic exchange resins having acidic or basic groups located on the resin, and wherein the fuel additive is at least partially removed from the ion-exchange resin in exchange for a component in the fuel which reversibly binds to the ion-exchange resin, and wherein the fuel additive is selected from the group consisting of lubricity additives, combustion improvers, cold flow improvers, dehazers, demulsifiers, cetane improvers, antioxidants, scavengers, pollution suppressants, manganese tricarbonyl additives, isostearic imidazoline, NOx/SOx hydrocarbon emission reducers, and deposit formation reducers and preventers.