Lactonitrile method is the acetaldehyde and hydrogen cyanide cold milk continuously fed to the reactor to generate a nitrile (or directly with the milk as raw material nitrile), with a pump into lactic acid powder hydrolysis reactor, into sulfuric acid and water to make milk nitrilase to give the crude acid. And then give it away crude lactic acid esterification reactor, adding ethanol esterification, distillation, concentration, Zinc lactate decomposition was fine. American Sterling Chemical Company and Japan Musashino Chemical companies are adopting this synthesis of lactic acid.
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