METHOD OF PRODUCING VANADYL FORMATE (IV) (EMBODIMENTS) Russian patent published in 2020 - IPC C01G31/00 C30B29/54 C30B29/64 

FIELD: chemistry.

SUBSTANCE: invention relates to production of vanadium salts using organic acids, particularly to production of vanadium formates, which can be used for synthesis of vanadates of alkali and alkali-earth metals, cathode materials, production of magnetic semiconductors. Method of producing vanadyl formate involves preparing an aqueous solution of a mixture of formic acid, ammonia and vanadyl sulphate, with the following ratio of components: vanadyl sulphate: 12–14 % ammonia: 45–99.7 % formic acid = 1 : 2.0–2.5 : 1.5–2.0, mixing of vanadyl sulphate and ammonia is carried out at room temperature with holding at this temperature for 20–30 minutes with subsequent separation of sediment by filtration and adding formanoic acid to the obtained solution by heating to 50–55 °C and holding at this temperature for 90–95 minutes, cooling to room temperature and filtration. Second embodiment involves preparation of an aqueous solution of a mixture of formic acid and vanadyl sulphate and further use of barium carbonate with following ratio of components: vanadyl sulphate: barium carbonate: 45–99.7 % formic acid = 1:1:2.0–2.5, wherein formic acid is added to barium carbonate, followed by addition of vanadyl sulphate and held at room temperature for 1.5–2.0 h, then filtered, and remaining solution is heated to 50–55 °C is cured at this temperature for 90–95 min, cooled to room temperature and filtered.

EFFECT: disclosed method of producing vanadyl formate is technologically simple and enables to obtain a pure single-phase product which does not contain impurity phases.

2 cl, 4 ex, 4 dwg