METHOD OF OBTAINING MANGANESE SALICYLATE (II) Russian patent published in 2008 - IPC C07C51/41 C07C65/10 

FIELD: chemistry.

SUBSTANCE: invention pertains to perfection of the method of obtaining manganese salicylate (II), which can be used as a reagent and catalyst of chemical transformations in laboratory and industrial practicale. The method involves reaction of metallic manganese and its dioxide with acid in the presence of an organic solvent and an iodine stimulating additive in a vertical type bead mill with glass bead as a grinding agent in the absence of supply of external heat. The content of salicylic acid and iodine in the load is 0.8÷2.2 and 0.04÷0.07 mol/kg respectively. Manganese dioxide is taken in molar ratio to the acid of 1: (4.0÷4.2) and 1:(1.9÷2.3) to metal. Mass ratio of the load to the glass beads is 1:1.5. The load is taken in the order glass beads, solvent, acid, stimulating additive, metal and then its dioxide. The process itself is started with mixing and is carried out at room temperature until complete exhaustion of the metal dioxide, after which mixing is stopped. The suspension of the product is separated from the glass beads and particles of unreacted manganese by passing through a filtering partition wall in form of a net with cell dimensions of 0.4÷0.5 mm. The obtained product residue from filtering is washed in liquid solvent, after which it is taken for cleaning by re-crystallisation. The filtrate, washed by the solvent and unreacted metal is returned for a repeated process.

EFFECT: obtaining manganese salicylate with direct reaction with salicylic acid in solutions at room temperature.

2 cl, 1 tbl, 8 ex