METHOD FOR PRODUCING BASE BISMUTH SUCCINATE Russian patent published in 2021 - IPC C01G29/00 C07F9/94 

FIELD: chemistry.

SUBSTANCE: invention relates to hydrometallurgy of rare metals and specifically to a method of producing bismuth succinate of basic composition (BiO)₂C₄H₄O₄. Method involves treatment of bismuth nitrate of basic composition [Bi₆O₄(OH)₄](NO₃)₆·H₂O with sodium hydroxide solution at molar ratio of sodium hydroxide to bismuth equal to 1.1–1.6, reaction of the obtained bismuth oxide with a solution of succinic acid with molar ratio of succinic acid to bismuth equal to 0.6–0.9, and process temperature of 60–80 °C, washing the obtained product with water and drying at temperature of 90–100 °C.

EFFECT: invention provides higher purity of the obtained product, as well as reduced consumption of succinic acid.

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