Abstract
In order to develop the nitration technology without environmental pollution nuisance, the environmentally friendly solid superacid catalyst WO 3/ZrO 2 prepared by the coprecipitation method was used for the liquid phase mononitration of chlorobenzene. The influences of different preparation conditions on the structure of WO 3/ZrO 2 were studied by the helps of XRD, TG-DSC, BET and NH 3-TPD, respectively, and those on the catalytic activity for the liquid phase mononitration of chlorobenzene were investigated. The results show that the activity of WO 3/ZrO 2 solid superacid is closely related with the WO 3 content, calcination temperature and crystal structure. The catalyst with 20%(wt) WO 3 and calcined at 973 K shows higher catalytic activity with the yield of chlorobenzene mononitration of 75.6% and the para-ortho isomer ratio of 3.73.
| Original language | English |
|---|---|
| Pages (from-to) | 971-976 |
| Number of pages | 6 |
| Journal | Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities |
| Volume | 25 |
| Issue number | 6 |
| State | Published - Dec 2011 |
Keywords
- Calcination temperature
- Coprecipitation
- Nitration
- Solid superacid
- Tungsten oxide
