The obtained results were as follows: (1) Ammoniumlactate decomposition, which produces lactamide and water can't be ignored in the reaction.
结果表明，反应过程中，乳酸铵分解成乳酰胺和水的副反应不可忽略；
2
To avoid the high cost in purifying lactic acid, lactide was prepared directly in the thesis from ethyl lactate and ammoniumlactate, which are intermediate products in the manufacture of lactic acid.