A method for supercritical ethylene technology sustainable preparation of high-performance ZIF-8 membrane and application
Patent Information
- Application Number
- CN202610507011.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ZIF-8 membrane materials suffer from problems such as uneven crystal structure, particle agglomeration, and residual organic solvents during the preparation process, resulting in poor stability and short lifespan under harsh chemical environments. Furthermore, supercritical CO2 and ethane systems can easily cause pore blockage in the membrane layer, affecting gas separation performance.
Using supercritical ethylene as the reaction medium, combined with dual zinc sources (zinc precursor layer and basic zinc nitrate), ZIF-8 membranes are grown in situ under mild conditions. By adjusting the temperature and pressure, the membrane pores are precisely constructed and the performance is optimized, avoiding intercrystalline defects and achieving efficient separation of olefins and alkanes such as propylene and propane.
The high-quality continuous growth of ZIF-8 membranes has been achieved, which improves gas separation performance and stability, reduces pollution emissions, and has good prospects for industrial application.
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