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US 2012/0238622 A1Published application
Iron (iii) citrate, substantially free of beta-iron hydroxide oxide
AssigneeJapan Tobacco Inc.
InventorsKoji Ando, Naoki Manta
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Abstract
This invention provides a method for producing high-purity iron(III) citrate substantially free of beta-iron hydroxide oxide, high-purity iron(III) citrate substantially free of beta-iron hydroxide oxide, and medical uses thereof.
Claims26
High-purity iron(III) citrate substantially free of beta-iron hydroxide oxide, wherein the beta-iron hydroxide oxide content is less than 6% by weight based on the total weight thereof.
A method for producing iron(III) citrate comprising:
- a step of forming an iron-containing precipitate comprising bringing ferric chloride into contact with sodium hydroxide for a short period of time at low temperature in an aqueous medium to form an iron-containing precipitate;
- a step of generating an aqueous solution of iron(III) citrate comprising bringing citric acid into contact with the iron-containing precipitate in an aqueous medium and generating an aqueous solution of iron(III) citrate via heating;
- and
- a step of precipitating iron(III) citrate comprising bringing the aqueous solution of iron(III) citrate into contact with an organic solvent to precipitate the iron(III) citrate.
1 more element
Dependencies are inferred from the claim text.