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ժҪ ͨ��ȩ��ȩ�Ͷ��Ұ��Mannich��Ӧ��Mannich��ķֽⷴӦ��ϳ��˼׻��ϩȩ��ȷ��˵ķ�Ӧ��:ԭ��n(��ȩ)��n(��ȩ)��n(��Ұ�)Ϊ1.1��1.0��1.0,��Ӧʱ��Ϊ50min,Mannich��Ӧ�¶�Ϊ46��,�ֽⷴӦ�¶�Ϊ75�档�ڴ��,��ȩת��99.8%,�׻��ϩȩ��91.2%��Բ�Ʒ��˺��ױ��

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�ؼ���� ׻��ϩȩ Mannich��Ӧ

Abstract�� Methacrolein(MAL)was synthesized by two-steps process,which includes Mannich reaction of formaldehyde,propionaldehyde and diethyl amine in the presence of acid catalyst and decomposition reaction of Mannich base.The proper reaction conditions were the molar ratio of formaldehyde to propionaldehyde to diethyl amine is 1.1��1.0��1.0,reaction time is 50 min,Mannich reaction temperature is (46 ��,) decomposition temperature is(75 ��.) Under the above conditions,conversion of propionaldehyde and yield of MAL were up to 99.8% and 91.2% respectively.The product was characterized by IR spectra.

Keywords��

Received 2007-11-15; published 2007-11-15

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��;��;��;��;.�׻��ϩȩ�ĺϳ�[J]. ��ѧ��ҵ�빤��, 2007,24(6): 510-512

WANG Bao-he,LI Yun-li,ZHANG Hao-jian,JING Xin.Synthesis of Methacrolein[J]. Chemcial Industry and Engineering, 2007,24(6): 510-512

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