Synthesis of Bismuth (III) Stearates
ANNA V. MININA, YURI M. YUKHIN, BORIS B. BOKHONOV, IRINA A. VORSINA, YURI I. MIKHAYLOV and LYUDMILA E. DANILOVA
Institute of Solid State Chemistry and Mechanochemistry,
Siberian Branch of the Russian Academy of Sciences,
Ul. Kutateladze 18, Novosibirsk 630128 (Russia), E-mail: Yukhin@solid.nsk.su
Pages: 371-378
Abstract
The synthesis of bismuth (III) oxohydroxostearate through the interaction of stearic acid with bismuth-containing perchlorate or nitrate solutions is investigated by means of X-ray phase analysis, thermogravimetry, electron microscopy, IR spectroscopy and chemical analysis. The conditions for the formation of bismuth stearate of Bi6O4(OH)4R6 composition (where R is stearate anion) are determined. Reasonability of obtaining highly pure bismuth stearate from metal bismuth is demonstrated; the latter is preliminarily oxidized with oxygen of the air, the resulting Bi2O3 is dissolved in nitric acid (1 : 1); bismuth is purified from extrinsic metals by its precipitation in the form of oxohydroxostearate, which is formed on adding bismuth nitrate solution to sodium stearate solution at the temperature of (80
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