Phosphorus-containing high-silica molecular sieve, its preparation and application thereof

A phosphorus-containing high-silica molecular sieve, comprising about 86.5-99.8 wt %, preferably about 90-99.8 wt %, of silicon, about 0.1-13.5 wt %, preferably about 0.1-9.0 wt %, of aluminum, and about 0.01-6 wt %, preferably about 0.01-2.5 wt %, of phosphorus, calculated as oxides and based on the dry weight of the molecular sieve,

• wherein the molecular sieve has an XRD pattern with at least three diffraction peaks, the first strong peak is present at a diffraction angle of about 5.9-6.9°, preferably about 6.1-6.8°;
• the second strong peak is present at a diffraction angle of about 10.0-11.0°, preferably about 10.2-10.7°;
• and the third strong peak is present at a diffraction angle of about 15.6-16.7°, preferably about 15.8-16.5°,
• preferably, the molecular sieve has a pore volume of about 0.20-0.50 mL/g, preferably about 0.30-0.45 mL/g, and a specific surface area of about 250-670 m2/g, preferably about 260-600 m2/g.