DETERMINATION OF THE ESTER COMPOSITION OF NEOPENTYL POLYOL ESTER LUBRICANTS.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 11, 1968
- Accession Number
- AD0679572
Entities
People
- P. J. Sniegoski
Organizations
- United States Naval Research Laboratory