METHOD OF PRODUCTION OF TOW-, THREE-, QUADRIVALENT MANGANESE SULFATES OR THEIR MIXTURES Russian patent published in 2005 - IPC

FIELD: methods of production of manganese sulfates of different oxidation level.

SUBSTANCE: the invention is dealt with methods of production of manganese sulfates of different oxidation level. Two, three and quadrivalent manganese sulfates or their mixtures are produced by interaction of manganese oxides - MnO,_{Mn2O3,Mn3O4 and MnO2- of any origin with a concentrated sulfuric acid. The interaction is conducted in a vertical type beaded mill with glass beads of 1,5-2 mm diameter, in which in succession introduce a dissolvent non-reacting with a concentrated sulfuric acid, a manganous reagent and a sulfuric acid. They use the manganous reagent ground up to particle sizes of 1 mm and less and the 79.8-90 % sulfuric acid in a molar stoichiometrical surplus in respect to the manganous reagent of 1.20-1.72. Then engage the bead mill and conduct process at 5-25°C during 5-10 minutes at a ratio of masses of the dissolvent and the reagents of 2.33:1-10:1. The dissolvent is separated from the beads and the product by filtration. Manganese sulfate localized in the form of a film basically on the surface of beads and partially on the walls of the reactor manganese sulfate or a mix of manganese sulfates is dissolved in the sulfuric acid of a corresponding concentration or enter in the new process conducted in the same bead mill with a manganese sulfate (III) or (IV) in the capacity of an oxidizing agent. The technical effect is a fast and quantitative interaction of manganese oxides with a concentrated sulfuric acid at the room temperatures in conditions of a fine powdering of a solid phase in the bead mill.}

EFFECT: the invention ensures the fast and quantitative interaction of manganese oxides with a concentrated sulfuric acid at the room temperatures and a fine powdering of a solid phase in the bead mill.

2 cl,30 ex, 2 tbl