| abstract |
The invention discloses the application of silica-based sulfonic acid in the nitration reaction of toluene. The raw material used is toluene, the nitrating agent is nitric acid, and the nitration product of toluene is obtained by nitration reaction at room temperature under the catalysis of silica-based sulfonic acid. Compared with the prior art, the present invention has the following advantages: (1) the catalyst raw material has a wide range of sources and is easy to prepare; it is stable to water, the catalyst is not deactivated, and can be recycled; (2) the catalyst has high catalytic activity, less dosage, and can be recycled It is convenient; (3) the p/o value of the toluene nitration product is high, which improves the added value of the product; (4) it replaces the concentrated sulfuric acid in the nitric/sulfur mixed acid process, which is environmentally friendly and has industrial application prospects. |