Ethyl Petroleum Additives, Inc.

Ethyl Corporation

Robert Quigley

John T Loper

Timothy J Henly

Gareth Charles Jeffrey

Mannich reaction products are disclosed as additives for hydrocarbon fuels. The Mannich reaction products are added to a low sulfur content, middle-distillate, compression ignition fuels in an amount effective to improve the lubricity of the fuel, typically within the range of from about 10 to about 1000 parts of additive per million parts fuel (ppm w/w), and thereby reduce the wear occasioned upon the fuel pump. Compositions comprising a hydrocarbon fuel and the reaction product are also disclosed.

Middle distillate fuels with enhanced lubricity comprising the reaction product of a phenol formaldehyde resin, an aldehyde and an amino alcohol

This invention relates to low sulfur fuel compositions which exhibit improved lubricity compared to the low sulfur fuels alone. The low sulfur fuel compositions contain a middle distillate fuel having a sulfur content of 0.2% by weight or less, a carboxylic acid amide and at least one member selected from the group consisting of cold flow improvers, ashless dispersants, and mixtures thereof.

Fuel additives and compositions

Low sulfur content fuel compositions containing additive compounds are described which exhibit improved lubricity. The additive compounds include a carboxylic acid substituted by at least one hydroxyl group, derivatives of the carboxylic acid substituted by at least one hydroxyl group, and an ester which is the reaction product of a carboxylic acid which does not contain any hydroxy-substitution in the acid backbone and an alkanolamine.

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Bracknell, United Kingdom

Robert Quigley