Thermal and thermal-oxidative stability of trichloroethanol sulfide

Autor: I. I. Medvedovskaya, L. F. Veselovskaya, S. B. Borshchevskii, É. F. Zorina, S. I. Kalyavina, O. N. Stepanova
Rok vydání: 1983
Předmět:
Zdroj: Chemistry and Technology of Fuels and Oils. 19:401-403
ISSN: 1573-8310
0009-3092
DOI: 10.1007/bf00726609
Popis: This article reports on an investigation of the thermal and thermal-oxidative stability of bis(2,2,2-trichloro-1-hydroxyethyl) sulfide CCl/sub 3/-CHOHO-S-CHOH-CCl/sub 3/, which contains trichloromethyl and sulfide groups. The antiscoring effectiveness of this compound in TSp-14.5 oil is considerably better than that given by oils with the presently used commercial additives. The thermal stabilities of the sulfide additive and the IS-45 oil were tested in a stream of nitrogen at 100-150/sup 0/C, analyzing the reaction products by iodometric and mercurimetric titration to determine the quantities of sulfur and chlorine ions and the degree to which the additive had been converted to these ions. The thermal decomposition of the additive begins at 118/sup 0/C and increases with increasing temperature, whether it is tested by itself or in a 1.25% solution in IS-45 oil. The additive and the hydrocarbon oil with and without the additive were oxidized with atmospheric oxygen in a thin layer in a series of sealed ampuls, which were removed sequentially from the thermostat at predetermined time intervals for analysis of the gas phase by gas chromatography. It is concluded that the sulfide, which was studied as an extreme-pressure additive, when blended in IS-45 oil, has a lower thermal stability but a highermore » thermaloxidative stability in comparison with the straight hydrocarbon oil IS-45.« less
Databáze: OpenAIRE
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