PHOSPHORUS MODIFIED MOLECULAR SIEVE WITH MFI STRUCTURE, CATALYTIC CRACKING AUXILIARY AND CATALYTIC CRACKING CATALYST CONTAINING PHOSPHORUS MODIFIED MOLECULAR SIEVE WITH MFI STRUCTURE, AND ALSO PROCESSES FOR THEIR PREPARATION Russian patent published in 2023 - IPC C01B39/10 C01B39/38 B01J29/40 B01J35/00 B01J37/04 B01J37/08 B01J37/10 B01J37/28 C10G11/05 

FIELD: molecular sieve.

SUBSTANCE: present invention relates to a phosphorus modified molecular sieve with an MFI structure. A phosphorus modified molecular sieve with an MFI structure having a K value satisfying the condition 70%≤K≤90% is described, where K=P1/P2×100%, P1 is the XPS measured mass content of phosphorus in a region with an area of 100 sq. nm and a vertical depth of 0 to 2 nm on any surface of the molecular sieve crystal grain, P2 is the measured EPMA mass content of phosphorus in a region with an area of 100 sq.nm and a vertical depth of 5 to 10 nm on any surface of the crystalline grain of the molecular sieve, and a method for its preparation. A catalytic cracking aid which, based on the dry weight of the catalytic cracking aid, contains 5-75 wt.% of said phosphorus-modified molecular sieve with an MFI structure, 1-40 wt.% binder and 0-65 wt.% of the second clay, method of obtaining the specified auxiliary agent; catalytic cracking catalyst containing a phosphorus-modified molecular sieve with an MFI structure, which, based on the dry weight of the catalytic cracking catalyst, contains 1-25 wt.% zeolite Y, 5-50 wt.% phosphorus-modified molecular sieve with an MFI structure, 1-60 wt.% inorganic binder and optionally 0-60 wt.% second clay, and a method for producing said catalyst are described. The method for catalytic cracking of liquid petroleum products includes: reacting liquid petroleum products by contact with the specified auxiliary agent for catalytic cracking or with the specified catalytic cracking catalyst under catalytic cracking conditions.

EFFECT: proposition of new technologies to improve the coordination of phosphorus and aluminium frame, improve the hydrothermal stability of the phosphorus-modified molecular sieve ZSM-5 and further increase the cracking activity.

41 cl, 239 ex, 10 tbl