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Inventia se refera la un procedeu de obtinere a bismutului metalic prin topirea reducatoare la maximum 950 degree C a complexului Bu-urotropina, cu continut de 21-23% Bi, rezultat prin precipitarea cu urotropina, a bismutului din solutiile acide conform caruia, în scopul obtinerii unui bidmut metalic 95-99% puritate se efectueaza topiterea autoreducatoare a complexului Bi-urotopina în cuptor tubular la minimum 800 degree timp de 30-90 min.
RO113202A1984-01-031984-01-03Procedeu de obtinere a bismutului metalic
RO87219B1
(ro)
Procede de preparation de l'acide n,n-dimethylamino-methane-diphosphonique a partir de n,n-dimethylformamide, d'acide phosphoreux et d'oxychlorure de phosphore