METHOD OF SYNTHESIS OF ALKALINE-SOLUBLE IRON CHELATE Russian patent published in 2001 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to method of synthesis of iron lignosulfonate chelate that can be used in agriculture and veterinary. Method involves mixing chelating agent with ferrous or ferric salt and nitrosated lignosulfonic acids forming in chelate stage preparing are used as chelating agent. Iron salts are added for two stages. Invention provides increase of iron content in iron lignosulfonate chelate (up to 52%) and use of both ferrous and ferric salts. EFFECT: improved method of synthesis, increased content of iron in product. 25 ex