摘要:
The presence of a minor amount of an anti-oxidant, a metal detergent, a dispersant or mixtures thereof in a hydrocarbon liquid containing certain quaternary ammonium hydroxides has been found to be effective in improving the thermal stability of the hydroxides.
摘要:
A lubricant-fuel mixture containing an amine salt and/or amide of a thiobenzoic acid derivative is effective in reducing the smoke emitted during operation of a two-cycle internal combustion engine. A preferred thiobenzoic acid derivative is 4-hydroxy-3,5-ditert-dibutyldithiobenzoate.
摘要:
The use of oxidants such as hydroperoxides in a lubricating oil have been found to be effective in reducing the war of one or more metal and/or ceramic surfaces in contact with an advanced ceramic surface. The reduced wear may be obtained in the absence of conventional antiwear additives such as zinc dialkyldithiophosphate.
摘要:
A lube oil composition having improved antiwear and friction reducing properties, together with a method for manufacturing same, are described. The lube oil comprises:A. a basestock;B. a metal phosphate;C. a metal carbamate; andD. a para alkyl hydroxy-aryl sulfide.
摘要:
This invention involves a method for preparing magnesium and calcium dihydrocarbyldithiophosphates comprising reacting magnesium or calcium in elemental metal form with a dihydrocarbyldithiophoric acid in the presence of an effective amount of a selected lower alkyl alcohol, particularly methanol, as a reaction promoter.
摘要:
A method for electrochemically removing halogen from a halogenated compound utilizing an electrically conducting liquid medium in an electrolytic cell is disclosed. Halogen is extracted and reacted with a metal present in the sacrificial anode to form a relatively insoluble metal halide salt. The invention is of particular utility in removing halogen from aromatic and aliphatic compounds.
摘要:
This invention involves the preparation of selected metal dithiobenzoates by electrolysis of a substituted dithiobenzoic acid with a metal. It further involves the use of such metal dithiobenzoates as additives in lubricating hydrocarbon compositions.
摘要:
Lubricating oil used for the lubrication of engines run on biodiesel fuels are improved in their resistance to oxidation by the addition to said to lubricating oil of particular detergents, and premixed mixtures of particular detergents and anti-oxidants.
摘要:
The invention comprises lubricating compositions and hydraulic to fluids containing N,N′-diaryl-o-phenylenediamine compounds that impart good levels of oxidation inhibition in the lubricants and hydraulic fluids. The invention further comprises a method of making N,N′-diaryl-o-phenylenediamine compounds.
摘要:
The present invention is directed to lubricating oils exhibiting improved resistance to oxidation and deposit/sludge formation comprising a lubricant base oil and an effective amount of a catalytic antioxidant comprising one or more polymetal organometallic compound, to a method for improving the antioxidancy and the resistance to deposit/sludge formation of formulated lubricating oil compositions by the addition thereto of an effective amount of the aforementioned polymetal organometallic compound, and to an additive concentrate containing the aforementioned polymetal organometallic compound.