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Investigations on calcium carboxylate and sulfonate additive incompatibilities in a preservation oil
Author(s) -
Scheuermann Sebastian S.,
Eibl Sebastian,
Forster Stephan,
Walz Jörg
Publication year - 2015
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1255
Subject(s) - carboxylate , sulfonate , calcium , chemistry , precipitation , salt (chemistry) , viscosity , organic chemistry , materials science , sodium , physics , meteorology , composite material
Severe quality defects of a well‐established preservation oil ranging from improper viscosity values to the formation of calcium carboxylate precipitates led to detailed investigations on the origin of these failures. Chemical analyses employing spectroscopic and chromatographic techniques focusing on the product's additives were performed. Thereupon, a mechanism for precipitate formation based on a delicate interaction between solubilizer, carboxylates, sulfonates and calcium ions was proposed. For this mechanism, ligand properties of sulfonates play a vital role: In contrast to monosulfonates, disulfonates seem to impede precipitation of calcium carboxylates. Copyright © 2014 John Wiley & Sons, Ltd.