METHODS FOR PREPARING FERRIC COMPLEXES WITH ONE SALICYLIC ACID ANION Russian patent published in 2007 - IPC C07C51/41 C07C51/47 C07F15/02 

FIELD: coordination compound chemistry.

SUBSTANCE: invention relates to technology of complexes of iron with salicylic acid suitable for use in a variety of technical areas and in medicine. Title complex is obtained via interaction of metal with acid using air oxygen as oxidant. Salicylic acid is used in butyl acetate or n-butyl alcohol solution with dissolved molecular iodine or potassium iodide. Iron is provided in the form of steel or cast iron shell, shaft, and blade of mechanical mixer as well as, agitated by the mixer, reduced iron powder fractions, broken cast iron or broken steel cuttings, cast iron or steel filings. Process is carried out at stirring with high-speed mechanical stirrer and air bubbling allowing self-heating of reaction mixture to 70-80°C until 1.72-1.85 mole/kg iron compounds is accumulated in reaction mixture in the form of suspension, whereupon mixing is stopped. Suspension is freed of unreacted fine iron and/or alloy(s) thereof and subjected to hot filtration, Filtrate is warmed to eliminate precipitated solid phase and then slowly cooled to ambient temperature. Precipitated solid phase is filtered off, dried, and recrystallized, while filtrate is recycled.

EFFECT: improved technology required only accessible starting materials and increased yield of desired product.

2 cl, 4 ex