Patent ID: 11964262
Assignee: RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 24:
25. The process according to claim 3, wherein the baking treatment in step d comprises baking in steam and baking in air, and step d is carried out according to mode (2) or mode (4), wherein:
mode (2) comprises sequentially subjecting the ammonium exchanged molecular sieve obtained in step c to the supporting treatment with the supported metal M1, baking in a steam atmosphere, the supporting treatment with the supported metal M2, the phosphorus modification treatment, and baking in air,, and
mode (4) comprises sequentially subjecting the ammonium exchanged molecular sieve obtained in step c to the phosphorus modification treatment, the supporting treatment with the supported metal M2, baking in air, the supporting treatment with the supported metal M1, and baking in steam.