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Alkali gaseous

Physical properties of hexachloroethane are Hsted in Table 11. Hexachloroethane is thermally cracked in the gaseous phase at 400—500°C to give tetrachloroethylene, carbon tetrachloride, and chlorine (140). The thermal decomposition may occur by means of radical-chain mechanism involving -C,C1 -C1, or CCl radicals. The decomposition is inhibited by traces of nitric oxide. Powdered 2inc reacts violentiy with hexachloroethane in alcohoHc solutions to give the metal chloride and tetrachloroethylene aluminum gives a less violent reaction (141). Hexachloroethane is unreactive with aqueous alkali and acid at moderate temperatures. However, when heated with soHd caustic above 200°C or with alcohoHc alkaHs at 100°C, decomposition to oxaHc acid takes place. [Pg.15]

The chemical resistance of PTFE is almost universal It resists attack by aqua regia, hot fummg nitnc acid, hot caustic, chlorine, chlorosulfonic acid, and all solvents. Despite this broad chemical resistance, PTFE is attacked by molten alkali metals, ammonia solutions of such metals, chlorine trifluoride, and gaseous fluonne at elevated temperature and pressure PTFE swells or dissolves m certam highly fluonnated oils near its melting point. Specific lists of chemicals compatible with PTFE are available [/.8]... [Pg.1106]

The available experimental data, because of their paucity and their inaccuracy, do not permit the extensive testing of these figures. The directly determined susceptibilities for helium, neon, and argon are in gratifying agreement with the theoretical ones (Table YI). From the mole refraction results we may expect ions in solution to have values of % near those for gaseous ions. KoenigsbergerJ has made determinations of % for seven alkali halides in aqueous solution, in... [Pg.699]

In the gaseous phase and in the presence of lithium, nitrogen gives lithium nitride U3N A = -197.48 KJ/mole, which is the only alkali nitride known to explode when heated between 115°C and 293°C. [Pg.165]

Intercalation of some guest species, such as alkali metals, can simply be performed via a chemical reaction of a gaseous reactant with graphite. [Pg.328]

Effect of molecular diffusion and vapor-phase chemical reactions Liquid metal vapors consist of molecules and gaseous atoms. Working with alkali metals, Ewing et al. (1967) found that the molecules are principally dimers and tetramers. The... [Pg.140]

After cocondensation of SiO (1226 cm 1) with alkali metal atoms like Na or K, new bands are detected at 1014 cm 1 (Na) or 1025 cm 1 (K). They can only be attributed to an SiO" anion because of the red shift of the SiO stretching vibration (with respect to that of uncoordinated SiO) and because of different isotopic splittings (28/29/30SiO, Si16/180) [21]. The formation of an ionic species M+(SiO) (M = Na, K) is in line with the results of quantum chemical calculations for the SiO anion (SiO d = 1.49 A, SiO" d = 1.55 A, "electron affinity" SiO + e + 1.06 eV —> SiO") [20]. Taking simple Coulomb interactions into consideration this species is very likely to have a strongly bent structure. The same situation occurs in gaseous NaCN (<(NaNC) = 81.2°) [22],... [Pg.151]

Landis MS, Keeler GJ, Al-Wali KI, Stevens RK (2004) Divalent inorganic reactive gaseous mercury emissions from a mercury cell chlor-alkali plant and its impact on near-field atmospheric dry deposition. Atmos Environ 38 613-622... [Pg.255]

Larger differences are observed when comparing the enthalpy of formation of the different halides of a given alkali metal. The enthalpy of formation of gaseous halide ions is exothermic since the exothermic electron gain enthalpy in absolute value is larger than the endothermic dissociation enthalpy. Furthermore, the enthalpy of formation of gaseous halide ions becomes less favourable with... [Pg.203]

Certain gaseous fluorides have been regarded as stable to hydrolysis, and it was therefore unexpected when Cady showed that C103F and S02F2 could be rapidly hydrolyzed in dilute alkali solutions (47). This was confirmed calorimetrically when it was shown that the rate of hydrolysis measured calorimetrically was dependent on mass transfer of gas across the gas-water interface. A bell-type calorimeter was used to overcome this problem (49,51). This type of calorimeter can be used for any gas-liquid reaction and is much more effective than passage of gas through sintered discs into solution. [Pg.24]

With modern EDC unit design, it is no longer necessary to provide a buffer of liquid chlorine between the chlor-alkali plant and the EDC or EDC/VCM plant. The EDC unit can easily and safely accept the gaseous feed of chlorine (after drying and compression) directly from the chlor-alkali plant. [Pg.283]


See other pages where Alkali gaseous is mentioned: [Pg.300]    [Pg.300]    [Pg.306]    [Pg.397]    [Pg.218]    [Pg.18]    [Pg.218]    [Pg.296]    [Pg.59]    [Pg.128]    [Pg.267]    [Pg.377]    [Pg.53]    [Pg.76]    [Pg.373]    [Pg.205]    [Pg.206]    [Pg.206]    [Pg.354]    [Pg.44]    [Pg.709]    [Pg.693]    [Pg.346]    [Pg.347]    [Pg.55]    [Pg.994]    [Pg.157]    [Pg.279]    [Pg.62]    [Pg.114]    [Pg.341]    [Pg.346]    [Pg.347]    [Pg.3]    [Pg.1650]    [Pg.202]    [Pg.294]    [Pg.13]    [Pg.41]    [Pg.2]   
See also in sourсe #XX -- [ Pg.270 ]




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Gaseous alkali metal halides ionic bonds

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