METHOD OF PRODUCING HIGHLY PURE TETRAHYDRATE OF MANGANESE ACETATE Russian patent published in 2011 - IPC C07C53/10 C07C51/41 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing tetrahydrate of manganese acetate, relating to chemical engineering of manganese compounds and can be used in producing pure manganese salts used in electronic industry as raw material for making solid-electrolyte capacitors. The method of producing tetrahydrate of manganese acetate involves leaching manganese carbonate with dilute chemically pure nitric acid, followed by filtration, dissolution of manganese carbonate in glacial acetic acid solution, alkalisation of the obtained product manganese acetate solution with aqueous ammonia solution, filtration of manganese acetate solution clarified by settling with separation of a precipitate of impurities from the solution, and evaporation of the solution to concentration 32-32.5 wt %, and addition acetic acid and crystallisation of manganese acetate from the solution by cooling at temperature 50-15°C, and adding into the solution nucleating agents from crystals of the tetrahydrate of manganese acetate in amount of 0.05 wt %, holding the suspension the crystalline manganese acetate precipitate obtained after crystallisation at final crystallisation temperature while stirring constantly, separating the crystalline manganese acetate precipitate followed by washing the crystalline precipitate with a saturated solution of pure manganese acetate and/or acetone at temperature equal to final crystallisation temperature.

EFFECT: obtaining highly pure powdered tetrahydrate of manganese acetate.

8 cl, 2 tbl, 2 ex