| abstract |
The present invention utilizes a sulfur reducing additive comprising a porous molecular sieve containing an oxidized metal of greater than zero in the pore structure of a sieve to reduce the sulfur content of liquid decomposition products, particularly decomposed gasoline, during the catalytic cracking process. It is about how to let. Molecular sieves are usually large pore size zeolites such as USY or zeolite beta or medium pore size zeolites such as ZSM-5. The metal is generally a tricyclic metal of the periodic table, preferably zinc or vanadium. Sulfur reduction catalysts can be used in the form of discrete particle additives or integrated decomposition / sulfur reduction catalysts. |