Accession Number:

AD0729498

Title:

Ueber die Potentiometrische Bestimmung der Saeurezahlen von Flugturbinenoelen (Concerning the Potentiometric Determination of Acid Numbers in Aircraft Turbine Oils),

Descriptive Note:

Corporate Author:

DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V MUNICH (WEST GERMANY)

Personal Author(s):

• Jantzen,Von Eilhard

Report Date:

1971-01-01

Pagination or Media Count:

9.0

Abstract:

Some difficulties are encountered using the present methods for determination of acid numbers in aircraft turbine oils, base stocks and used oils. This applies especially to aged oils for which the inflection points can sometimes hardly be established or not at all. Preliminary tests with pure substances show the influence of solvents and their mixtures on the curve and inflection point, using tetrabutyl-ammoniumhydroxide as a titrating agent. Optimum results were obtained with chlorobenzenedimethyl- sulphoxide and toluenedimethyl-sulphoxide 31. The dependency of the acid number on the size of sample as well as the repeatability have been investigated on various aircraft oils. An improved method for the aviation sector is given. Author

Descriptors:

• *LUBRICANTS
• *AIRCRAFT ENGINE OILS
• CHEMICAL ANALYSIS
• CHEMICAL ANALYSIS
• HYDROLYSIS
• CARBOXYLIC ACIDS
• ORGANIC SOLVENTS
• SULFOXIDES
• WEST GERMANY

Subject Categories:

• Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE