58.
(11) Patent number: 2158225
(46) Date of publication: 27.10.2000
(51) Int. Cl.7: C 01 G 29/00
(21) Application number: 99120471/12
(22) Application date: 27.09.1999
(71) Applicant:
Institut khimii tverdogo tela i mekhanokhimii SO RAN,
Zakrytoe aktsionernoe obshchestvo "Redmetfarm"
(72) Inventor:
Jukhin Ju.M.,
Daminova T.V.,
Afonina L.I.,
Danilova L.E.
(73) Proprietor:
Institut khimii tverdogo tela i mekhanokhimii SO RAN,
Zakrytoe aktsionernoe obshchestvo "Redmetfarm"
(98) Mail address:
630128, g.Novosibirsk-128, ul. Kutateladze 18, IKhTTM SO RAN, Ushakovoj E.P
(54) METHOD OF PREPARING BISMUTH NITRATE
(57)
FIELD: industrial inorganic synthesis. SUBSTANCE: bismuth-containing material is treated with acid. Hydrolytic purification of bismuth is carried out with alkali reagent solution at pH 0.5-1.4 and temperature 40-70 C. Bismuth hydrogen nitrate is converted into bismuth nitrate at equilibrium concentration of acid in solution 2.8 to 10.6 M and end temperature of process 15-25 C. EFFECT: essentially increased purity of solution, eliminated environmentally hazardous concentrated nitric acid evaporation stage, and threefold reduced power consumption. 2 tbl, 2 ex
|
|
