Lubricity additives for low sulfur hydrocarbon fuels

Fuel and related compositions – Liquid fuels – Organic nitrogen compound containing

Reexamination Certificate

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Details

C044S335000, C044S432000, C044S433000

Reexamination Certificate

active

06872230

ABSTRACT:
The present invention relates to additives for enhancing the lubricity of hydrocarbon fuel oils, the inventive additive composition including one or more of the reaction products of (i) an alkylated polyamine and (ii) urea or isocyanate, or the salt adducts of these reaction products. More particularly, the present invention provides for a process for improving the lubricity of hydrocarbon fuel oils, which are low in inherent lubricity due to treatment to reduce sulfur and aromatic components for improved emissions.

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