lactic acid,calcium lactate,sodium lactate

Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.

2013年8月30日星期五

Lactate or sodium lactate with ferrous sulfate

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.
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. by the addition of ferrous sulfate or calcium lactate solution plus ferric chloride solution obtained, but also by lactic acid powder was added sucrose and refined iron reaction, and then crystallization derived ferrous lactate.

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