摘要
以乙醇胺(MEA)为原料,以脱铝丝光沸石分子筛为催化剂,采用气固相常压催化合成哌嗪。以气相色谱内标法进行定量分析,考察反应温度、n(MEA)∶n(NH3)、质量空速、含水质量分数对反应的影响,确定了哌嗪合成的最佳条件:反应温度为340℃,n(MEA)∶n(NH3)=1∶0.7,质量空速为0.3554 h-1,含水质量分数为50%时,哌嗪转化率为70%,收率为16%,选择性为25%。
The synthesis of piperazine from ethanolamine over dealuminated mordenite is investigated by adsorption of atmospheric gas solid phase. Using gas chromatographic internal standard method as the quantitative analysis, the effects of reaction temperature, methanol-ammonia ratio, MHSV, moisture content are studied. The obtained optimal operation parameters are shown as follows ：340℃ of reaction temperature, 1：0. 7 molar ratios of methanol and ammonia, 0. 3554/h^-1 of MHSV, 50% of moisture content. The conversion of ethanolamine is around 70%. The yield and selectivity of piperazine are 16% and 25% ,respectively.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第8期58-59,61,共3页
Modern Chemical Industry
关键词
乙醇胺
哌嗪
脱铝丝光沸石
ethanolamine
piperazine
dealuminated mordenite
