FLUIDS, LUBRICANTS, FUELS AND RELATED MATERIALS. Quarterly Report for January, February, and March 1958

Technical Report · Mon Mar 31 00:00:00 EST 1958

OSTI ID:4310582

The high-temperature properties of five paraffinic resins and a synthetic condensition type resin are discussed. The superior over-all stability properties of two Pennsylvania paraffinic resins at 700 deg F are demonstrated. Batch hydrogenation of a Pennsylvania paraffinic resin is described. The increasing difficulty of hydrogenation is related to increasing molecular weight for conventionally refined fractions from the same crude source. The reduction of dispersant properties of bright stocks and resins by hydrogenation is noted. The thermal stabilities of an ester and a polyester of the neopentyl type are compared with other neopentyl esters evaluated previously. A similarity in high temperature oxidative behavior is shown between monisopropyl biphenyl and a partially hydrogenated condensed ring aromatic hydrocarbon fraction. Low molecular weight Acryloid polymers of the dispersant and conventional viscosity- index (V. I.) improver type are compaired with commercially available additives of each type. Additional laboratory dath are given for a series (MLO 7291 through MLO 7298) of experimental mineral oil jet engine lubricants. Those data include lubricity tests, evaporation 400 deg F, isothermal successive oxidation tests at 500 deg F,and non-isothermal successive oxidation tests at 500 and 347 deg F. The successive oxidation tests adequately illustrate dirtiness of the type noted in the J-57 jet engine tests. The mineral oil formulations MLO 7291 through MLO 7295 show less dirtiness and more oxidative stability in the successive oxidition tests thin do the MIL-L-7305 type lubricants. Within the mineral oil series advantages are shown for the higher molecular weight bright stock and the dispersant type additive package in terms of cleanliness in the successive oxidation tests. A trend toward increasing dirtiness in some naphthenic mineral oils and decreasing dirtiness in some pariffinic mineral oils has been shown for silicone antiform additives under 347 deg F oxidation conditions. The selectivity of dithiocarbamate oxidation inhibitors for paraffinic mineral oils is demonstrated. Batch to batch variation in the effectiveness of a dithiocarbamate additive is also discussed. The use of a dispersant additive to improve the high temperature (500 deg F) oxidative dirtiness of isosebacite cster formulations is illustrated. A technique for the quantitative determination of oxygen assimilated in the controlled atmosphere panel coker has been developed. Preliminnry tests show no correlation between the quantity of oxygen absorbed and the panel deposit value. A severe oxidation effect has been found for the Spec. MIL-L-7805 type evaporation test at 400 and 500 deg F. Oxidation inhibitors in esters have been shown to be a significant factor in controlling evaporation loss in the 400 deg F test. The evaluation of a series of experimental phosphorous-type lubricity additives in the four-ball wear tester is discussed. The use of fuel dilution in mineral oils to achieve improved low temperature fluidity is illustrated. Increased test severity in the single-pass high temperature lube rig is demonstrated for tests in which air rate is increased or flow rate is decreased. (auth)

• Research Organization: PEnnsylvania State Univ., University Park. Petroleum Refining Lab.
• DOE Contract Number: AF33(616)-5460
• NSA Number: NSA-12-016323
• OSTI ID: 4310582
• Report Number(s): PRL-5.23
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: United States
• Language: English

Related Subjects

ENGINEERING
AIR
ALKYL RADICALS
AROMATICS
CARBAMATES
DISPERSIONS
EFFICIENCY
ESTERS
EVAPORATION
GAS FLOW
HIGH TEMPERATURE
HYDROGENATION
IMPURITIES
ISOMERS
LOSSES
LUBRICATION
MOLECULES
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN
PARAFFIN
PETROLEUM
PHENYL RADICALS
POLYESTERS
POLYMERS
PREPARATION
PROPYL RADICALS
QUANTITATIVE ANALYSIS
REFINING
RESINS
STABILITY
TEMPERATURE
TESTING
THERMODYNAMICS
VARIATIONS
VISCOSITY
WEAR
WEIGHT