Accession Number : AD0757605

Title :   Determination of Zinc Dialkyl(Diaryl)Dithiophosphate in Lubricating Oil.

Descriptive Note : Final rept.,

Corporate Author : COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Kolobielski,Marjan

Report Date : FEB 1973

Pagination or Media Count : 43

Abstract : The overall objective of the project is the development of new and improved methods for determining composition of lubricating oils used in internal-combustion engines. This particular study is concerned with the development of analytical methods for identifying, separating, and determining the concentration of zinc dialkyl(diaryl) dithiophosphate additive present in fully formulated lubricating oils. Simple, rapid, qualitative tests for identification of the additive were developed. The additive was separated from the base hydrocarbon oil and isolated in a concentrated form by means of elution chromatography on silica gel-celite mixtures. The best results were obtained when the water content of the silica amounted to about 15-20 percent. The approximate concentration of the additive was determined by a combination of methods consisting of hydrolysis, elution and gas chromatography, as well as elemental analysis. (Author)

Descriptors :   (*LUBRICANT ADDITIVES, CHEMICAL ANALYSIS), SULFUR COMPOUNDS, PHOSPHATES, INTERNAL COMBUSTION ENGINES, HYDROLYSIS, GAS CHROMATOGRAPHY, INFRARED SPECTRA

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE