Patent ID: 9012685
Filing Date: 2015-04-21
Classification: C07C,C12P

Abstract:
1. A method for recovering alkyl lactate, comprising: step 1: producing a source liquid comprising lactic acid or ammonium lactate; step 2: dehydrating the source liquid product of step 1; step 3: producing a liquid mixture by sequentially adding and stirring an alcohol and an acid solution to the dehydrated source liquid of step 2; step 4: separating and removing ammonium salt precipitate from the liquid mixture of step 3; step 5: producing an alkyl lactate from the ammonium salt-free liquid mixture by carrying out an esterification reaction; and step 6: separating an alcohol and alkyl lactate by distilling the mixture of step 5, wherein the alcohol of step 3 is selected from the group consisting of methanol, ethanol, normal propanol and isopropanol.