Production process of tetramethyl piperidone and preparation method of catalyst of tetramethyl piperidone
The catalyst prepared by the composite sol-gel method solves the problems of low catalyst activity and poor stability, and achieves high yield and high purity of tetramethylpiperidinone, thus extending the catalyst's service life.
Patent Information
- Application Number
- CN202512044274.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing technology, the production process of tetramethylpiperidinone has low catalyst activity, weak binding force between active components and support, poor catalyst stability, poor product yield and purity, and short catalytic life.
The catalyst was prepared by a composite sol method, which formed a composite sol with components such as aluminum isopropoxide, tetraethyl orthosilicate, cerium nitrate and zirconium nitrate. Combined with the post-treatment of ammonium dihydrogen phosphate and ammonium molybdate, POX bonds were gradually formed during the calcination process to ensure uniform dispersion and porous structure of the active components. Alumina and silica were used as supports to form multi-level channels, which improved the stability and selectivity of the catalyst.
The catalyst's stability and lifespan were improved, and the yield and purity of tetramethylpiperidinone were significantly increased. After 1200 hours of continuous operation, the yield was 91.1-92.5% and the purity was 98.34-98.85%.