Fluorinated lubricant oils

Oxidation inhibitors, for lubricating oil and grease, 75 219-221 Oxidation number system, 7 7 392 Oxidation potential, of fluorine, 77 828 Oxidation process(es), 9 275. See also Dye oxidation advanced, 77 803... 

The incorporation of polar groups in unvulcanized polymers reduces their solubility in benzene. Thus the copolymer of acrylonitrile and butadiene (NBR), polychlorobutadiene (Neoprene), and fluorinated EP (the copolymer of ethylene and propylene) are less soluble in benzene and lubricating oils than the previously cited elastomers. Likewise, silicones and phosphazene elastomers, as well as elastomeric polyfluorocarbons, are insoluble in many oils and aromatic hydrocarbons because of their extremely low solubility parameters (silicons 7-8 H polytetrafluoroethylene 6.2 benzene 9.2 toluene 8.9 pine oil P.6). 

Ye CF, Liu WM, Chen YX et al (2002) Tribological behavior of Dy-sialon ceramics sliding against SijN under lubrication of fluorine-containing oils. Wear 253 579-584... 

The determination of fluorine in various liquid and gaseous hydrocarbons is vital at many points in the refining process primarily in any blend component that has been sourced fiom the hydrogen fluoride (HF) Alkylation Unit. Fluorinated compounds poison process catalysts therefore, it is essential that process feeds be as free of fluorine as possible. As an example, butane is used to produce methyl tertiary-butyl ether (MTBE). The butane must be fluorine free prior to butane isomerization to prevent the poisoning of the process catalyst, fri addition, any HF acid or its combustion products may be extremely destructive in any environment. Therefore, any finished hydrocarbon product or synthesized material that is utilized in the presence of sufficient heat (i.e., car engine), such as frel and lubricating oils, must be free of fluoride. 

Any of a group of five chemically related nonmetallic elements chlorine, bromine, fluorine, iodine, and astatine. Chlorine compounds are used as EP additives in certain lubricating oils, and as constituents of certain petrochemicals (e.g., vinyl chloride, chlorinated waxes). Chlorine and fluorine compounds are also used in some synthetic lubricants. 

Fluoroethylene Fluorine-containing oligomers Daikin Kogyo Lubricating oils Additives for rubber... 

Fluorinated rubbers, copolymers of hexafluoropropylene and vinylidene-fluorides, have excellent resistance to oils, fuels and lubricants at temperatures up to 200°C. They have better resistance to aliphatic, aromatic and chlorinated hydrocarbons and most mineral acids than other rubbers, but their high cost restricts their engineering applications. Cheremisinoff et al. [54] provide extensive physical and mechanical properties data on engineering plastics. A glossary of terms concerned with fabrication and properties of plastics is given in the last section of this chapter. 

Uses and Sources. As a fluorinating agent in the production of water- and oil-repellant materials and lubricity improvers found as a degradation product of sulfur hexafluoride... 

The other major springboard for the fluorocarbon chemical industry was the "Manhattan Project to develop the atomic bomb. This required the large-scale production of highly corrosive elemental fluorine and uranium(VI) fluoride for the separation of the radioactive 235U isotope. Oils capable of resisting these materials were needed to lubricate pumps and compressors, and polymers were needed to provide seals. Peril uorinated alkanes and polymers such as PTFE and poly(chlorotrifluoroethylene) (PCTFE) proved to have the appropriate properties so practical processes had to be developed for production in the quantities required. In 1947 much of this work was declassified and was published in an extensive series of papers3 which described the fundamental chemistry on which the commercial development of various fluoro-organic products, especially fine chemicals, was subsequently based. 

The procedures for the preparation of thionyl tetrafluoride and pentafluorosulfur hypofluorite are essentially the same, with one important difference the use of a catalyst. The apparatus employed in the preparations consists of several Monel pressure vessels (which have been prefluorinated at 150-200 ), a standard glass vacuum line equipped with several large calibrated storage bulbs (1- or 2-1.), a partial fractionation train, and several ball-joint connections on the main manifold. All the joints and stopcocks on the vacuum line are lubricated with Kel-F-90t grease, and all mercury manometers are covered with Kel-F-10 oil,t which has been well outgassed. The vacuum line is connected to a fluorine metering system and a water... 

A standard Pyrex vacuum apparatus is employed in this preparation. The system includes a fractionation train consisting of four U-tube traps, attached with ball joints, a mercury manometer, and several ball-joint connections on the manifold. The mercury in the manometer is covered with outgassed Kel-F-10 oil, and the stopcocks and ball joints are lubricated with Kel-F-90 grease. The fluorine metering system consists of a fluorine tank properly shielded and vented, a sodium fluoride scrubber (45 X 13 cm.), two calibrated rotameters for measuring flow rate and fluorine concentration, and a helium source, and is constructed of -J-in. copper tubing. 

Use Fluorinating agent for making water and oil repellents and lubricity improvers. 

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