Nitrogen purification

Chemical Conversion. Except for control of nitrogen impurity levels, the same chemical conversion methods used for nitrogen purification at low flow rates can also be used for argon purification. Although used less commonly for argon purification than for nitrogen purification, these chemical conversion methods are appHed in point-of-use purifiers located close to where the gas is consumed. 

Nitrogen, purification of, 41, 97 Nitromethane in condensation with formaldehyde, 41, 67 1-Nitro-l-methylcyclohexane, 43, 89... 

NITR0CYCL00CTENE, 50, 84 Nitrogen atmosphere, apparatus for maintaining, 52, 46 Nitrogen, purification, 50, 69 1-Nitro-l-octadecene, 50, 86 o-Nitrophenylacetaldehyde dimethyl acetal, 52, 139 4-p-Nitrophenyl-l,2,4-triazoline- 3, 5-dione, synthesis of, 51, 125... 

As with other chlorides electrolysis can give rise to nitrogen trichloride. The anticaking agents used on commercial potassium chloride may be nitrogenous. Purification methods for potassium hydroxide manufacture are discusssed. 

In brief, the procedure consists of passing sulfur(IV) oxide, diluted with an inert gas, through a metal or glass tube packed with silver(II) fluoride. The product is collected in a glass trap cooled with liquid nitrogen. Purification is effected either by scrubbing the crude product with an aqueous solution of potassium iodide or by distillation at atmospheric pressure. 

Steel cylinder containing nitrogen Nitrogen purification solution ... 

Lilan et al. prepared MSC for air separation by the carbonization of two Chinese anthracite coals. The coals were ground, mixed with a binder, carbonized, and subsequently activated with CO2. The activated material thus obtained was modified by the pyrolysis of toluene and tar fractions of oil at 1073 K to obtain molecular sieve materials. These MSC materials were found to have predominantly a micropore size of 0.33 to 0.40 mn and were used to separate air to a nitrogen purification of 98.6%. 

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