Composition of overbased sulfonates

Kotova, G. G.; Zimina, K. I.

doi:10.1007/bf00717155

Cited by 2 publications

(3 citation statements)

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“…However, they are influenced by the interaction between the SO; head group and other polar materials in solution, e.g., carbonate, alcohol, etc. (16), ' (23). The bands at 1597, 1138 and 1010 cm-' in the spectrum correspond to the frequencies of C = C, G H Flg.…”

Section: Resultsmentioning

confidence: 98%

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The Effect of Concentration, Solvent, and Temperature on Aggregation of a Commercial Calcium Sulfonate Additive as Studied by FTIR and Light Scattering Techniques

Sun

Hsu

1997

Tribology Transactions

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The aggregation of a calcium sulfonate in organic solvents was studied by the Fourier Transfom Znfrared (FTIR) spectroscopy and dynamic light scattering techniques. The symmetric stretching band of the S= 0 bond was found to be sensitive to the concentration of the additive and to the polarity of the solvent. A critical micelle concentration (CMC) may exist in the concentration range of 0.04-0.11 millimole/liter. As the solvent polarity increased, the width in half height of the symmetric stretching band of S= 0 increased, and the interaction between the solvent and the polar head of calcium s u b nate increased accordingly. This interaction weakened the interaction between the polar heads themselves, and thereby the size of the micelle decreased as found by dynamic light scattering. When the polarity of a solvent is strong enough, e.g., in heptanoic acid or water, the micelles f m d may revert back to nonnal micelles. The FTIR spectra and aggregation size of calcium sulfonate in hexadecane showed that higher temperatures decreased the width in half height of the asymmetric stretching bands and concurrently decreased the size of the aggregation.

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Section: Resultsmentioning

confidence: 98%

“…The other G H bands that are observed in the spectrum arise from the base oil carrier for the additive and, possibly, substituted alkyl groups on the benzene ring. The band at 882 cm-' can be assigned as the vibration of cos2- (16), (18). It is quite weak because of the low total base number.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Concentration, Solvent, and Temperature on Aggregation of a Commercial Calcium Sulfonate Additive as Studied by FTIR and Light Scattering Techniques

Sun

Hsu

1997

Tribology Transactions

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“…At the present stage of industrial development, large-scale work is being carried out in the Republic of Uzbekistan to ensure the effective use of available financial and material resources. In this direction, an important and relevant issue is the involvement in the production of scientific and applied and innovative projects and developments, the implementation of which addressed issues not only commercialization [1], but also environmental, environmental protection, with the expansion of raw materials to obtain new formulations of import-substituting products, including lubricants [2][3][4]6]. Of particular interest is the use of used lubricants, while it should be emphasized that the collection and disposal of used oils and lubricants, on a large industrial scale, allows, to a large extent, to solve the problems of environmental protection from the point of view of preventing its pollution, and significantly expand raw materials for the production of lubricants for various purposes.…”

Section: Introductionmentioning

confidence: 99%