Method for preparing benzoic acid by oxidizing methylbenzene at room temperature
By using a combination of cobalt salt and nitrate synergistic catalyst, imine cocatalyst, and acetic acid solvent at room temperature and normal pressure, combined with the synergistic effect of manganese metal salt and cobalt salt, the problems of equipment corrosion under high temperature and high pressure conditions and the introduction of halogen Br in the prior art have been successfully solved, thus achieving efficient and highly selective benzoic acid preparation.
Patent Information
- Application Number
- CN202411832390.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-03-18
AI Technical Summary
In the prior art, the process of preparing benzoic acid by liquid-phase air oxidation of toluene needs to be carried out under high temperature and high pressure conditions, and there are problems of equipment corrosion and halogen Br introduction, and the conversion rate and selectivity are not high.
Commercially used cobalt salts and nitrates are used as synergistic catalysts, imine compounds are used as cocatalysts, and acetic acid is used as solvents to react at room temperature and normal pressure, and the synergistic effect of manganese metal salts and cobalt salts is used to promote the progress of the reaction.
The preparation of benzoic acid with high yield and high selectivity is achieved, and equipment corrosion under high temperature and high pressure conditions and the introduction of halogen Br are avoided. The catalyst is cheap and easy to obtain, easy to operate, and low economic cost.