论文部分内容阅读
在微通道反应器内对氯苯硝化反应进行了研究,考察了氯苯与硝酸的摩尔比、体积流速、反应温度等对单程转化率及选择性的影响。实验选择了较优工艺参数组合:n(氯苯)∶n(硝酸)=1∶1.3,n(硝酸)∶n(硫酸)=1∶3,氯苯体积流速0.5 mL/min,反应温度80℃,氯苯单程转化率达74.8%,n(邻硝基氯苯)∶n(对硝基氯苯)=0.56∶1,时空转化率(STC)达4.07×109mol/(m3.h)。微通道反应器内,时空转化率是常规反应器的3.08×104倍。
In the microchannel reactor, the nitration of chlorobenzene was studied. The effects of molar ratio of chlorobenzene to nitric acid, volumetric flow rate and reaction temperature on the conversion and selectivity of single pass were investigated. The optimal process parameters were chosen as follows: n (chlorobenzene): n (nitric acid) = 1: 1.3, n (nitric acid): n (sulfuric acid) = 1: 3, chlorobenzene volume flow rate 0.5 mL / min, reaction temperature 80 ℃, the conversion of chlorobenzene was 74.8%, the n (o-nitrochlorobenzene): n (p-nitrochlorobenzene) = 0.56:1, and the STC was 4.07 × 109mol / (m3.h). In the microchannel reactor, the spatiotemporal conversion is 3.08 × 104 times that of a conventional reactor.