Accession Number : AD0679572

Title :   DETERMINATION OF THE ESTER COMPOSITION OF NEOPENTYL POLYOL ESTER LUBRICANTS.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Sniegoski,P. J.

Report Date : 11 OCT 1968

Pagination or Media Count : 19

Abstract : Methods of gas-liquid chromatography and thin-layer chromatography have been applied to the analysis of neopentyl polyol ester lubricants. By direct programmed-temperature gas chromatography of the lubricants, the components were separated according to volatility; in most cases resolution was adequate for semiquantitative analysis. Gas-liquid chromatographic analysis of the free acids produced by hydrolysis of the sample revealed the acyl composition. The parent polyols were determined by programmed-temperature gas chromatography of their valerate esters. A semipreparative thin-layer chromatographic method permitted the isolation of the three main ester types--trimethylol propane, pentaerythritol, and dipentaerythritol for further analysis. By a combination of these analytical methods the actual ester composition of the lubricant may be determined. Such detailed information had not previously been accessible by analytical procedures. (Author)

Descriptors :   (*LUBRICANTS, *CHROMATOGRAPHIC ANALYSIS), (*ESTERS, LUBRICANTS), GAS CHROMATOGRAPHY, THIN LAYER CHROMATOGRAPHY, COMPUTER PROGRAMS, HYDROLYSIS, ACIDS

Subject Categories : Organic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE