Catalytic cracking agent containing phosphorus-modified molecular sieve, preparation process thereof, preparation system and use thereof

A catalytic cracking agent, having an active component consisting of a phosphorus-modified molecular sieve and a non-phosphorus-modified molecular sieve or only consisting of a phosphorus-modified molecular sieve, characterized in that:

• (i) the active component consists of the phosphorus-modified molecular sieve and a non-phosphorus-modified molecular sieve,
• wherein the catalyst cracking agent has a D value of phosphorus in the catalytic cracking agent, determined with an electron probe microanalysis (EPMA), of ≥65%, and
• wherein said catalytic cracking agent contains, on the dry basis:
• 1-25 wt % of a non-phosphorus-modified molecular sieve;
• 5-50 wt % of a phosphorus-modified molecular sieve;
• 1-60 wt % of an inorganic binder;
• and
• optionally, 0-60 wt % of a second clay;
• or
• (ii) the active component only consists of the phosphorus-modified molecular sieve,
• wherein the catalyst cracking agent has a D value of phosphorus in the catalytic cracking agent of ≥82%, and
• wherein, on the dry basis, said catalytic cracking agent contains:
• 5-75 wt % of a phosphorus-modified molecular sieve;
• 1-40 wt % of an inorganic binder;
• and
• optionally, 0-65 wt % of a second clay.