|
Green Synthesis and Characterization of DL-Aspartic Acid Cui Jianlan, Xu Chunyan, Cao Duanlin Abstract The process of synthesizing DL-Aspartic acid with
maleic acid and ammonia as raw materials was improved in this paper. It realizes the green
synthesis at a low cost and less pollution, when maleic acid was used instead of
traditional hydrochloric acid in the acidification process. The yield of DL-Aspartic
acid was up to 75% above and purity 98.9%. The product DL-Aspartic acid was
characterized by IR, the amino-acid automatic analyzing instrument, nuclear magnetic
resonance. DL- 天冬氨酸的绿色合成崔建兰 徐春彦 曹端林(华北工学院化学工程系 山西太原 030051) 摘要 本文对以顺丁烯二酸与氨水为原料合成DL-天冬氨酸的方法进行了改进，在酸化后处理过程中，以顺丁烯二酸代替传统的盐酸，反应平均收率提高到75%以上，纯度达98.9%，实现了绿色合成，减少了污染，降低了成本，并通过红外光谱、核磁共振、氨基酸自动分析仪等对产品进行了表征。关键词 DL-天冬氨酸 顺丁烯二酸 表征 崔建兰 女，35岁，硕士，副教授，现从事精细化学品的合成研究和教学工作。2002-07-29收稿，2002-10-08修回 |