摘要
以γ-丁内酯和乙醇胺为原料,分别经氨解、卤化、去氯化氢等过程制备出N-乙烯基吡咯烷酮。主考察去氯化氢过程中,反应温度、反应时间、溶剂以及碱浓度等对反应的影响,同时对产物及其中间体进行相关表征。结果表明,以异丙醇为溶剂,反应温度65℃,反应时间3h,n(NaOH)/n(N-氯乙基吡咯烷酮)=1.1(异丙醇)/V(N-氯乙基吡咯烷酮)=1.5,去氯化氢反应的转化率和选择性分别可达93.7%和90.7%。
N-vinylpyrrolidone （NVP） was prepared through ammonolysis reaction, halogenation, and dehydrohalogenation from γ-butyrolactone and ethanolamine. The factors which affected the dehydrohalogenation such as reaction temperature, reaction time,solvent and amount of the base were studied mainly,and the product and its intermediate were characterized. The results showed that when in the presence of 2-propnal , reaction temperature was 65℃, reaction time was 3h, n （NaOH）/n （N-chloroethyl pyrrolidone）= 1.1 and V （2-propanol）/V （N-chloroethyl pyrrolidone）= 1.5, the conversion and selectivity of dehydrohalogenation was up to 93.7% and 90.7% respectively.
