The raw material of polylactic acid, namely - hydroxy acid, 2 - hydroxy propionic acid. As acid molecule has an asymmetric carbon atom, and therefore have a d-type (right optical) and L-(L-optical) of the two enantiomers, the same amount of L-lactic acid and d-lactate mixture dL - Lactic acid does not have optical activity. A fiber-forming poly-L-lactic acid as potassium lactate monomer.
The industrial production of L-lactic acid fermentation are mainly chemical synthesis method and the two categories. China lactic acid fermentation industry mainly uses corn, rice, dry matter powder as raw material,magnessium lactate, oatmeal, etc. for the materials to α-amylase, glucoamylase liquefied agent, saccharification agent, CaCO3 as neutralizer production by fermentation calcium lactate, lactic acid and further acidification purified product.
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