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;
pyrite in melt byproducts: Fe-oxide; addn. of pyrite to concd. soln. of NaNO3 and NaOH; melting;; separation of Na2SO4 and NaNO2 from the Fe-oxides by dissolcing in water; separation of sodium salts by crystallisation;;
参考文献
Gmelin Handbook: Na: MVol., 66, page 263 - 265
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Vereinigte Chem. Fabriken Leopoldshall
Patent: DE95885 , 1897 ;
in water other Radiation; (239)Pu-α-radiation; yield of NO2(1-) in iones/100 eV(conc. of soln. in normality): 0.1(0.01), 1.2(0.1), 2.6(1.0), 3.7(4.0), 4.0(6.0);
in melt byproducts: Na2SO4, Na2SO3; in melt at 330°C;
参考文献
Kozlowski, T. R.; Bartholomew, R. F.; Garfinkel, H. M.
J: Inorg. Nucl. Chem., 1970 , vol. 32, p. 401 - 409
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Gmelin Handbook: S: SVol.3, 2.1.8.10.2, page 211 - 212
