摘要
本文报导了在系列复合氧化物催化剂上苯胺和甲醇反应合成Ｎ，Ｎ－二甲苯胺（ＤＭＡ）研究，并从中选择了活性和选择性都良好的ＬＨＰ催化剂，在常压气相反应条件下详细地考察了反应温度，液时空速（ＬＨＳＶ），苯胺和甲醇摩尔比变化等对催化剂活性和选择性的影响，提出了两段转化的新工艺流程。并经扩大试验，证明两段转化工艺过程优于一段转化法。第一段反应时苯胺转化率大于９５％，ＤＭＡ选择性大于７０％，第二段转化后，产物中几乎不含苯胺，ＤＭＡ选择性大于９４％，并在工业固定床催化反应装置中常压气相反应条件下试生产成功。
A new complexed oxide catalyst LHP and new technology——two step vapor phase catalytic process for the N-methylation of aniline to N,N dimethylaniline (DMA) have been developed.The catalytic reactions have been carried out in fellowing conditions: T =300℃,atmospheric pressure,LHSV=0.6h -1 .The conversion of aniline was 100%,the selectivity to DMA was more than 94.5% and the by product N,N dimethyltoluidine was less than 1.5%.The productive capacity of the catalyst for DMA exceeded 150kg/h.per ton of catalyst.The new process could be stably operated without the volatile additive for stabilization of the catalyst.The new catalyst and the catalytic process have been successfully applied to the industrial production.
出处
《化学研究与应用》
CAS
CSCD
1997年第1期15-19,共5页
Chemical Research and Application
基金
国家教委资助
关键词
二甲基苯胺
苯胺
甲基化
催化剂
气相法
N
N dimethylaniline N methylation of aniline completed oxide catalyst
