air in neat (no solvent) byproducts: H2O; mixture of NH3 and air is passed over heavy metal oxides (Fe or Cu oxides) at 600-750°C; separation of H2O by passing formed N2O3 through separator; N2O3 is passed into Na2CO3; absorption;; NaNO2 lye;;
excess of carbonatfree NaFeO2 used; heating in fire-proof tube under NO-atmosphere first at 250°C then 400°C for 48 h; tempering at 360°C for 72 h; extraction with dry methanol, crystn.; content of preparation >99.9 wt.-percent NaNO2;
参考文献
Journal of the American Chemical Society, , vol. 79, p. 265 - 266
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反应条件
calcium hydroxide powder; nitrous gases in neat (no solvent) byproducts: CaSO4; absorption of nitrous gases by Ca(OH)2; addn. of alkali sulfates in such amoumts, that equivalent amounts of K2SO4 / Ca(NO3)2 and Na2SO4 / Ca(NO2)2 are in soln.;; filtration; evaporation and crystallisation ; product mixture of NaNO2 and KNO3 is obtained;;
