METHOD OF OBTAINING MANGANESE (II) BENZOATE Russian patent published in 2010 - IPC C07C63/08 C07C51/41 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining manganese (II) benzoate through direct reaction of metal with carboxylic acid in the presence of an oxidising agent, a stimulating iodine additive and a liquid phase organic solvent in a bead mill, in which the oxidising agent used is manganese peroxide taken in amount of 0.15-0.50 mol/kg, and molar ratio of metal:peroxide equal to (1.5.2.2):1; benzoic acid is taken in amount of (2,05÷2,1)·(n_Mn+), where n_Mn and - number of moles of metal and its peroxide in the load, the liquid phase solvent used is butylacetate and the stimulating additive of molecular iodine is taken in amount of 0.02-0.05 mol/kg; the process is started and carried out while stirring intensely and under forced cooling at temperature ranging from room temperature to 45-60°C until achieving virtually quantitative consumption of metal and its peroxide into a product, after which stirring and forced cooling of the reaction mixture are stopped, the reaction mixture is separated from the glass beads and filtered, the glass beads and reactor components are washed with a liquid phase solvent which is then taken for washing the residue on the filter, the obtained filtrate is cooled to 7-10°C and kept at that temperature for 2-2.5 hours for completion of crystallisation of the product, the suspension formed is filtered, the obtained residues of the product are separately taken for cleaning through recrystallisation, and the filtrate is returned for the repeated process. Output the extracted solid product is 87-97% of the theoretical output. A portion of the product is returned for the repeated process together the filtrate.

EFFECT: design of an improved method of obtaining manganese benzoate.

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