摘要
研究了在Corning■高通道微通道反应器内,以聚四氢呋喃装置副产物乙酸甲酯,二甲胺为原料,甲醇钠为催化剂,液-液均相反应合成N,N-二甲基乙酰胺.考察了反应温度、停留时间、催化剂的含量,原料摩尔比对单程转化率及选择性的影响.优化筛选出了较优的工艺参数:反应温度140℃,停留时间72 s,n(乙酸甲酯):n(二甲胺)=1:1.1,n(甲醇钠):n(乙酸甲酯)=0.02:1,乙酸甲酯单程转化率达到97.5%,N,N-二甲基乙酰胺选择性达到100%.
A new process for the liquid-liquid homogeneous synthesis of N,N -dimethylacetamide was investigated in a Corning advanced-flow TM G1 reactor with by-product menthyl acetate of polytetrahydrofuran plant and dimethylamine as raw materials and sodium methoxide as catalyst. The effects of reaction temperature, resident time, catalyst content and the mole ratio of raw material on the single conversion of menthyl acetate and the selectivity of N,N -dimethylacetamide were investigated. The results showed that when the reaction temperature was 140 ℃, resident time was 72 s, n (menthyl acetate ): n (dimethylamine )=1 : 1.1 and n (sodium methoxide ): n (menthyl acetate )=0.02 : 1, the single conversion of menthyl acetate rate and the selectivity of N,N -dimethylacetamide reached 97.5%, 100%, respectively.
作者
钟心燕
吴斌
池华春
杨超
ZHONG Xin-yan;WU Bin;CHI Hua-chun;YANG Chao(Engineering & Technical Institute of Chongqing Jianfeng Industrial Group Co.,Ltd.,Chongqing 406801,China)
出处
《广州化工》
CAS
2019年第20期47-50,共4页
GuangZhou Chemical Industry
基金
涪陵区科技计划项目(FLKW,2017AAA1021)
