Phosphorus-modified mfi-structured molecular sieve, catalytic cracking auxiliary and catalytic cracking catalyst containing phosphorus-modified mfi-structured molecular sieves, and processes for preparing the same
AssigneesChina Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
InventorsYibin LUO, Chengqiang WANG, Ying OUYANG, Enhui XING, Xingtian SHU
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Abstract
A phosphorus-modified MFI-structured molecular sieve is characterized in that the molecular sieve has a K value, satisfying: 70%≤K≤90%; for example, 75%≤K≤90%; further for example, 78%≤K≤85%. The K value is as defined in the specification. A cracking auxiliary or cracking catalyst contains the phosphorus-modified MFI molecular sieve.
Claims34
A phosphorus-modified MFI-structured molecular sieve, which is characterized in that the molecular sieve has a K value, satisfying 70%≤K≤90%;
- for example, 75%≤K≤90%;
- further for example, 78%≤K≤85%;
- wherein, K=P1/P2×100%,
- P1 represents the mass content of phosphorus within a region having an area of 100 square nanometers and a vertical depth from 0 to 2 nm at any crystal surface of the crystal grain of a molecular sieve, as measured by the XPS method,
- P2 represents the mass content of phosphorus within a region having an area of 100 square nanometers and a vertical depth from 5 to 10 nm at any crystal surface of the crystal grain of a molecular sieve, as measured by the EPMA method.
A catalytic cracking auxiliary, based on the dry basis of the catalytic cracking auxiliary, the catalytic cracking auxiliary contains 5-75 wt %, for example, 8-60 wt % of the phosphorus-modified MFI-structured molecular sieve according to claim 1, 1-40 wt % of a binder and 0-65 wt %, for example, 5-55 wt % of a second clay.
A catalytic cracking catalyst containing phosphorus-modified MFI-structured molecular sieve(s), based on the dry basis of the catalyst, the catalytic cracking catalyst contains 1-25 wt % of Y zeolite, 5-50 wt % of the phosphorus-modified MFI-structured molecular sieve according to claim 1, 1-60 wt % of an inorganic binder and optionally 0-60 wt % of a second clay.
31-32. (canceled)
Dependencies are inferred from the claim text.