| 摘要 |
PROBLEM TO BE SOLVED: To provide a Ti-Si molecular sieve having high activity, higher micropore volume and lower mesopore volume, and to provide a synthesis method of the Ti-Si molecular sieve. ! SOLUTION: The synthesis method of the titanium silicate molecular sieve, the crystal grain of which has 1.1-5 ratio of (surface Si/Ti ratio): (bulk Si/Ti ratio), comprises: a step (1) of mixing a titanium source, a template agent, an organic silicon source, water and optionally an inorganic amine source, hydrolyzing an obtained mixture, and removing alcohol from the hydrolyzed mixture; a step (2) of aging an obtained product at 15-50°C; and a step (3) of mixing the aged product with a solid silicon source homogeneously, crystallizing an obtained mixture in an airtight container, and collecting the crystallized titanium silicate molecular sieve. The titanium silicate molecular sieve has a micropore structure having the pore diameter smaller than 1 nm and a mesopore structure having 2-8 nm pore diameter. ! COPYRIG |
