FIELD: processes of bismuth salts production. SUBSTANCE: gallic acid solution is produced by adding of alkali reagent to water containing crystals of gallic acid up to pH 4-7. Added to obtained solution is bismuth-containing solution. Gallic acid-bismuth molar ratio equals to 1.0-1.2. Concentration of free nitric acid in solution is 0.1-0.6 mole/l. Process temperature is 15-90 C. EFFECT: simplified process, higher degree of bismuth recovery to final product and increased specific surface of product. 1 tbl, 2 ex
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