To avoid the high cost in purifying lactic acid, lactide was prepared directly in the thesis from ethyl lactate and ammonium lactate, which are intermediate products in the manufacture of lactic acid.
本文从乳酸生产过程中的中间体——乳酸乙酯和乳酸铵出发，避开乳酸的纯化工艺，直接进行合成丙交酯的研究。
The obtained results were as follows: (1) Ammonium lactate 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；
The obtained results were as follows: (1) Ammonium lactate 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；
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