Lead oleate

Lead oleate greases tend to cause violent explosions when used on hot-running bearings. The cause is not immediately apparent, but peroxidation may well have been involved. 

Oleic acid may be obtained from glycerol trioleate, present in many liquid vegetable and animal nondrying oils, such as olive, cottonseed, lard, by hydrolysis. The crude oleic acid after separation of the water solution of glycerol is cooled to fractionally crystallize the stearic and palmitic acids, which are then separated by filtration, and fractional distillation under diminished pressure. Oleic acid reacts with lead oxide to form lead oleate, which is soluble in ether, whereas lead stearate or palmitaie is insoluble, prom lead oleate oleic add may be obtained by treatment with IL 5 (lead sulfide, insoluble solid, formed). With sodium oleate, a soap is formed. Most soaps are mixtures of sodium stearate, palmitate. and oleate. 

Lanolin appears to penetrate into the stratum corneum, but remains in the more superficial layers.38 39 Using the tape stripping technique, Clark demonstrated the penetration of anhydrous lanolin (2 mg/cm2) applied to the flexor aspect of the inner forearm.40 Almost all of the applied lanolin was recovered and most was removed in the first 15 strippings. Although the bulk of lanolin may remain in the superficial layers, electron-dense lead linoleate and lead oleate topically applied in lanolin were observed by transmission electron microscopy to be localized in intracellular spaces as far down as the stratum granulosum 40... 

Such catalysts include potassium acetate, sodium benzoate, certain basic inorganic salts (IS, 21, 22), lead oleate and other lead salts (23), alkali soaps (23), and metal naphthenates (2Ji). Also at 125°, trimers of phenyl isocyanate form in high yield catalyzed by A-methylmorpholine in the presence of ethyl alcohol (26). Epoxides have been reported to be active for trimerization in the presence of a small amount of amine (26, 27). Ethylene carbonate also is effective in production of trimer (28). Recently... 

See lead naphthenate lead oleate lead stearate soap... 

Diachylon 043 A plaster made out of litharge and either olive oil or olive oil and lard, hence consisting essentially of lead oleate mixed with small amounts of glycerin and oleic acid. It is used for skinned surfaces and wounds and as an adhesive. 

Lead Oleate, Oleic acid lead saft. Approx Pb(C.8-... 

The peptization of lead upon the addition of oleic acid to a kerosene suspension of lead granules was observed by Gurvich. However, in this case, the process was driven by a chemical reaction— the formation of a soft film of lead oleate that could be easily removed by friction. This case establishes the basis for the chemical polishing of glass and metals. 

The role of amine on the precursor decomposition was probed by the addition of diethylamine to TDPSe in ODE, and also to the mixture of lead oleate and TDPSe in ODE. In both experiments, the reaction was heated to 5(f 0 °C and the presence of diethylamine resulted in the increase of the precursor decomposition. The presence of diethylamine also affected the morphology of PbSe nanocrystals by releasing amine from TDP thereby enhancing the attachment process. 

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