SYNTHESIS AND PERFORMANCE STUDY OF SATURATED MONOESTER-TYPE LUBRICITY ADDITIVES FOR ULTRA-LOW SULFUR DIESEL FUELS

Abstract

Abstract: Using various saturated dicarboxylic acids (anhydrides) and alcohols as raw materials, a series of saturated dicarboxylic acid monoester compounds were synthesized through esterification. An optimal saturated dicarboxylic acid monoester-type lubricity additive compound was selected, which has a low freezing point and exhibits good anti-wear performance in diesel fuel. Ultimately, monoisoalcohol ester of succinic acid was screened out. Preferably, monoisononyl succinate, when added to ultra-low sulfur diesel at a dosage of 200 μg/g, can significantly enhance the lubricating performance of the diesel, reducing the WS1.4 value from 646μm to 281μm. This new lubricity additive has a freezing point as low as -50°C, showing potential for application in low-temperature environments.

Key words: lubricity additives, lubrication property, low freezing point, diacid monoester, diesel

References

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