1 by calcium lactate or sodium lactate solution with ferrous sulfate or ferrous chloride lactic acid powder. Lactic acid was added refined sugar and iron, direct response obtained after crystallization. In order to prevent oxidation, the reaction should be concentrated, crystallized and dried, sealed.
2, the calcium lactate or sodium lactate with ferrous sulfate (ferrous sulfate and the solvent water mass ratio of 2:1) in 45 ~ 50 ℃ and 2.5 ~ 3.0 Ph value 40min reaction conditions can be obtained products.
3, by the addition of ferrous sulfate or Zinc lactate solution plus ferric chloride solution obtained, but also by lactic acid solution was added sucrose and refined iron reaction, and then crystallization derived ferrous lactate.
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