一种晶种辅助合成SSZ-13分子筛方法
By optimizing the method of seed-assisted synthesis of SSZ-13 molecular sieve, the problems of low silicon utilization and large grain size in the existing technology have been solved, achieving high efficiency of NH3-SCR reaction activity and low cost preparation. The prepared SSZ-13 molecular sieve has high crystallinity and small particle size.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHIA TAI ENERGY MATERIALS DALIAN
- Filing Date
- 2022-02-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for preparing SSZ-13 molecular sieves suffer from low silicon utilization, low yield, and large crystal size, which leads to limited mass transfer and poor NH3-SCR reactivity. Furthermore, existing seed crystal synthesis methods are costly and time-consuming, making it difficult to meet the requirements for high-efficiency catalysis.
SSZ-13 molecular sieves were prepared by a seed-assisted synthesis method, which involved mixing silicon source, aluminum source, water and template agent, adding alkali metal hydroxide and seed crystals, and then aging, crystallizing and calcining the mixture. The crystallization temperature and time were controlled, the initial gel composition and the amount of seed crystals added were optimized, and the utilization rate of silicon and the product yield were improved.
The prepared SSZ-13 molecular sieve has high crystallinity, small particle size, and fast mass transfer, exhibiting good NH3-SCR reactivity. This reduces the synthesis cost and improves silicon utilization and product yield.
Smart Images
Figure CN116692897B_ABST