论文部分内容阅读
以改性骨架镍为催化剂,二甲基甲酰胺为溶剂研究了3,3′-二硝基-4,4′-二氨基二苯醚的加氢反应动力学。结果表明,在转化率为80%以前有良好的反应选择性,副反应可忽略不计。研究了反应速度与温度、浓度、氢压等参数的关系。得知在转化率为80%以前原料的转化速率对氢分压为0.7级,对原料的浓度为零级。在温度为90—110℃,氢分压为3—30 at,原料浓度为0.4—1.2mol/l,催化剂用量为8 g/l的条件范围内可用式dc/dt=K_(H_2)~(0.7)表示。反应速度与温度的关系符合Arrhenius方程式。求得活化能为14.5 kcal/mol。同时,对高转化率的情况也进行了讨论。
The hydrogenation kinetics of 3,3’-dinitro-4,4’-diaminodiphenyl ether was studied with nickel as catalyst and dimethylformamide as solvent. The results showed that there was a good reaction selectivity before the conversion was 80%, and the side reactions were negligible. The relationship between reaction rate and temperature, concentration, hydrogen pressure and other parameters was studied. It is known that the partial pressure of hydrogen is 0.7 at the conversion rate of the raw material before the conversion is 80%, and the concentration of the raw material is zero. In the condition of temperature 90-110 ℃, hydrogen partial pressure 3-30 at, raw material concentration 0.4-1.2mol / l and catalyst dosage 8g / l, the equation dc / dt = K_ (H_2) ~ 0.7). The reaction rate and temperature are in accordance with the Arrhenius equation. The activation energy was found to be 14.5 kcal / mol. At the same time, the situation of high conversion rate was also discussed.