Titanium fluorocarbon

Fluorocarbon groups, containing titanium complexes, 25 98 Fluorocarbon industry, 18 303 Fluorocarbon production, 11 869 Fluorocarbons... 

Organic compounds Organic fluorine compounds arc made by reaction of the corresponding alkane chloro-compounds with silver fluoride, mercurous fluoride, antimony trifluoride, titanium tetrafluoridc. and the arene fluoro-compounds by the diazo-reaction using hydrogen fluoride, and otherwise. The effect of the continued replacemenl of hydrogen atoms by fluorine atoms is an initial increase in reactivity, followed by a reversal of this effect, so lhal the highly substituted compounds arc relatively inert, See also Fluorocarbon. 

A variety of electrode reactions14 can occur at the anode. Some of them result in the formation of gases, corrosive attacks on most electrode materials, or oxidative attacks on the membrane in contact with the anolyte solution. Platinum is too cosily for use as an anode material, but titanium or tantalum conted with ex ire ms ly thin (mjcrainchas) layers of platinum has bean used. Lead dioxide deposited on and within graphite has been used also. Oxidation-resistant rnsmbranes (fluorocarbon-based) often are used adjacent to the anolyte solution even though they are expansive. 

This concept of biocompatibility, which equates the quality to inertness and biological indifference, has resulted in the selection of a portfolio of acceptable or standard biomaterials which have widespread usage. These range from the passivatable alloys such as stainless steel and titanium alloys, the noble metals gold and platinum, to some oxide ceramics such as alumina and zirconia, various forms of carbon and a range of putatively stable polymeric materials including silicone elastomers (poly-siloxanes), polyolefins, fluorocarbon polymers and some polyacrylates. Of course, if this was all there was to biocompatibility, there would be few problems other than optimizing inertness and there would be little to write about. 

Answer by author Oxylube is not a fluorocarbon material it is a trade name for a group of dry film lubricants based on molybdenum disulfide. Fluorocarbon lubricants are not recommended for use with aluminum, magnesium and possibly titanium. Under certain conditions—particularly under shear loads when bare metal is exposed to the lubricant—it is possible to produce an exothermic Grignard-type reaction. If the heat of such reaction is confined, a fire or an explosion may occur. For such metals, molybdenum disulfide lubricants are usually recommended. 

Titanium is not recommended for use in contact with fluorine gas. The possibility of formation of hydrofluoric add even in minute quantities can lead to very high corrosion rates. Similarly, the presence of free fluorides in acid aqueous environments can lead to formation of hydrofluoric acid and, consequently, rapid attack on titanium. On the other hand, fluorides chemically bound or fully complexed by metal ions, or highly stable fluorine-containing compounds (e.g. fluorocarbons), are generally noncorrosive to titanium. 

Wet chlorine is very corrosive to all of the more common construction metals. At low pressures wet chlorine can be handled in chemical stoneware, glass or porcelain equipment and in certain alloys. Hard rubber, polyvinyl chloride (maximum of 41 kPa (6 psig)), fiberglass-reinforced polyester, polyvinylidene chloride or fluoride and frilly halogenated fluorocarbon resins have been used successfully. For maximum working pressure see Chlorine Pamphlet 6 [9]. All of these materials must be selected with care. For higher pressures, lined metallic or compatible metallic systems should be used. In the metallic systems, Hastelloy C, titanium and tantalum have been used. Within limits, titanium may be used with wet chlorine, but must not be used with dry chlorine under any circumstances because it bums spontaneously on contact. Tantalum is inert to wet and dry chlorine at temperatures up to 300°F(149°C). 

As shown in Fig. 5 7(b) the solid polymer electrolyte cell comprises a membrane, fuel cell type, porous electrodes and three further components z carbon collector, a platinized titanium anode support and a cathode support made from carbon-fibre paper The collector is moulded in graphite with a fluorocarbon polymer binder A 25 pm thick platinized titanium foil is moulded to the anode side to prevent oxidation. The purpose of the collector is to bnsure even fluid distribution over the active electrode area, to act as the main structural component of the cell, to provide sealing of fluid ports and the reactor and to carry current from one cell to the next E>emineralized water is carried across the cell via a number of channels moulded into the collector These channels terminate in recessed manifold areas each of which is fed from six drilled ports. The anode support is a porous conducting sheet of platinized titanium having a thickness of approximately 250 pm. The purpose of the support is to distribute current and fluid uniformly over the active electrode area. It also prevents masking of those parts of the electrode area which would be covered by the... 

In 1962, Hugo Stoltzenberg and his coworker Martin Leuschner (1913-1982) filed a patent on obscurants based on titanium and fluorocarbons and/or chloro-carbons that was pubhshed in 1965 [51]. In 1963, the IIT Research Institute located in Illinois Chicago issued a report under Air-Force contract on thermochemical properties of a large number of metal/oxidizer systems. Their considerations also included both CF4 and C2F6 as oxidizers [52]. 

While complexes 1-5 did not promote saturated alkane or fluorocarbon activation, the lessons learned from die synthetic and reactivity studies have led to the synthesis of the tris(triflate) complex 13, which is considerably more reactive due to the labile triflate ligand sphere. A promising example of the enhanced reactivity of 13 is its electrophilic substitution reactions with benzene and pyridine to form titanium-carbon bonds. These "titanations" are formal carbon-hydrogen bond activation processes and should allow access to the many useful organic reactions that titanium-carbon bonds are known to undergo (37,38). 

Torlon 4203L Amoco Performance Products Filler 3.5% Titanium dioxide, fluorocarbon filler... 

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