lime nitrogen in sodium hydroxide addn. of lime nitrogen to NaOH/H2O in the presence of wetting agents at 40°C with stirring, 1h;; filtration; washing with soln. containing NaHCN and NaOH; evapn. at 75°C, 75 Torr; drying at 65-70°C, 12-25 Torr, 1.5h;;
Casas, Jose S.; Castineiras, Alfonso; Condori, Felix; Couce, Maria D.; Russo, Umberto; Sanchez, Agustin; Sordo, Jose; Varela, Jose M.
European Journal of Inorganic Chemistry, 2003 , # 15 p. 2790 - 2797
Noller, D. C.; Post, H. W.
Journal of Organic Chemistry, 1952 , vol. 17, p. 1393 - 1396
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Gmelin Handbook: Si: MVol.C, 4, page 14 - 18
