Procedure for evaluating susceptibility of motor oils to high temperature oxidation
This article proposes a laboratory method for the evaluation of the thickening tendencies (viscosity increase) of motor oils. The high viscosity of used oil results from the accumulation of soluble and insoluble products from oil oxidation and fuel combustion. The influence of oxidative processes on viscosity increase is indicated by the sharp increase in the motor oil's content of sludge, various resins, and acidic products, as indicated by the increase in acid number (large amounts of oxidation products can also be detected in the oil by means of infrared spectroscopy). The proposed lab method is convenient in terms of time required, simple in terms of apparatus, and (when compared with methods using oxygen) it is safe. The test apparatus consists of an air blower, a surge tank, and a system of differential manometers. The motor oil test samples were prepared under lab conditions by blending lube stocks from various sources with the appropriate additives. It is determined that for the oils from the West Siberian crudes, the viscosity increase is far less than for the oils from the Volgograd crudes. The lube stocks from Volgograd crudes, which are low-sulfur and naphthene-paraffin based, respond poorly to many additives and are readily oxidized to form carbenes and carboids. Lube stocks from West Siberian crudes show a good response to most additives. Includes a table.
- OSTI ID:
- 6732464
- Journal Information:
- Chem. Technol. Fuels Oils (Engl. Transl.); (United States), Vol. 19:7; Other Information: Trans. from Khimiya i Tekhnologiya Topliv i Masel, Jul 1983
- Country of Publication:
- United States
- Language:
- English
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LUBRICATING OILS
OXIDATION
VISCOSITY
MOTORS
ADDITIVES
BLOWERS
CARBENES
COMBUSTION PRODUCTS
COMPARATIVE EVALUATIONS
CYCLOALKANES
INFRARED SPECTRA
MIXING
PARAFFIN
PETROLEUM
PH VALUE
PRESSURE GAGES
RESINS
SAMPLE PREPARATION
SIBERIA
SLUDGES
SOLUBILITY
SULFUR CONTENT
TANKS
VOLGA RIVER
ALKANES
ASIA
CHEMICAL REACTIONS
CONTAINERS
EASTERN EUROPE
ENERGY SOURCES
EUROPE
FOSSIL FUELS
FUELS
HYDROCARBONS
LUBRICANTS
MEASURING INSTRUMENTS
OILS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RADICALS
RIVERS
SPECTRA
STREAMS
SURFACE WATERS
USSR
WAXES
020500* - Petroleum- Products & By-Products