The present invention pertains to a process for manufacturing dialkyl lactamide comprising the steps of reacting lactide and dialkylamine selected from one or more of dimethylamine, diethylamine, and methylethylamine to form a reaction mixture which comprises dialkyl lactamide selected from N, N-dimethyl lactamide, N,N-diethyl lactamide, and N,N-methylethyl lactamide, N,N-dialkyl lactoyl lactamide, and dialkylamine, subjecting the reaction mixture to a separation step to form a product stream comprising N,N-dialkyl lactamide, a first recycle stream comprising dialkylamine and a second recycle stream comprising N,N-dialkyl lactoyl lactamide, feeding the recycle streams to the reaction step, and isolating the product stream. The process allows the manufacture of N, N-dimethyl lactamide, N,N-diethyl lactamide, and N,N-methylethyl lactamide on commercial scale.
本发明涉及一种制造二烷基内酰胺的方法,包括以下步骤:将内酯和二烷基胺(所选自
二甲胺、
二乙胺和甲
乙胺)反应,形成反应混合物,其中包括所选自N,N-二甲基内酰胺、N,N-
二乙基内酰胺、N,N-甲乙基内酰胺、N,N-二烷基内酰基内酰胺和二烷基胺的二烷基内酰胺;将反应混合物经过分离步骤,形成产品流,其中包括N,N-二烷基内酰胺、第一循环流,包括二烷基胺和第二循环流,包括N,N-二烷基内酰基内酰胺;将循环流送回反应步骤,隔离产品流。该方法允许商业化生产N,N-二甲基内酰胺、N,N-
二乙基内酰胺和N,N-甲乙基内酰胺。