Inert gases, liquified

Collect on Tenax-TA desorb thermally inject by cryotrap Collect on Tenax-GC desorb thermal 1y Purge from liquified fat at 115°C, trap on Tenax / silica gel, thermal desorpti on Macerate in water purge with inert gas trap on Tenax-GC desorb thermally Purge from water-serum mixture containing anti foam reagent at 115°... 

Gas Liquified Cryogenic Flammable Toxic Asphyxiant Inert Corrosive Oxidizer... 

Properties Nitrogen is a colorless, odorless gas making up about 78% of the air. It can be liquified under pressure. At normal temperatures, it is unreactive (inert). 

When M = oxidative addition occurs, but the alkyl and hydride ligands are readily replaced by [CpRh(CO)], leading to dimerization. Similar investigations have been conducted at reduced temperatures in liquified rare gases.Liquid xenon especially is a good, inert solvent for alkane activation reactions. A weak solvent complex is formed with the rare gas (M—Kr < M—Xe, despite lower temperature for liquid Kr), according to Scheme This is replaced by alkane... 

Butadiyne, H-CSC-C C-H, as a polymerizable monomer, has received very little attention from polymer chemists although its discovery dates back to Bayer in 1885. This structurally simple, highly reactive bifunctional molecule would be expected to have been a monomer of considerable interest in the field of polymer chemistry. Possibly, limited butadiyne stability may account for the small amount of polymerization research. The The compound is a liquified gas at room temperature (BP = 10 C), discolors slowly in sealed vessels at 20 C and may explode if heated. Storage and instability problems may be circumvented. Prevention of explosion may e accomplished by addition of an inert diluent such as butane. The monomer may also be stored in t e form of a labile complex with N-methyl-pyrrolidone. Its thermal condensation or polymerization was briefly recorded as an observation by Bayer and described in a little more detail by Miiller in 1925. Prevention of this thermal polymerization has been the subject of several patents with methylene blue, pyridine and vinylpyridine claimed as inhibitors. 

The process is strongly exothermic, AH=-107.6 kj/mol, so the produced gas is cooled and either processed immediately or liquified by refhgeration (b.p. 7.56 °C at 101.3 kPa) and stored (349). Noncondensed phosgene is absorbed directly with solvent to form phosgene solution. Nonabsorbable gases (CO, inert gases, phosgene) are fed to the waste-gas treatment (Fig. 92). 

Like carbon, nitrogen is a nonmetal. Pure N2 is prepared by distilling liquified air, and it has a number of uses. Since nitrogen gas is not very chemically reactive, it is used as an inert atmosphere in some industrial applications, particularly where fire or chemical reactivity may be a hazard. People have been killed by accidentally entering chambers filled with nitrogen gas, which acts as a simple asphyxiant with no odor to warn of its presence. Liquid nitrogen boils at a very cold -190°C. It is widely used to maintain very low temperatures in the laboratory, for quick-fi eezing... 

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