FCC to minimize butadiene yields

U.S. Patent Number: 5324419

Abstract: A process for fluidized catalytic cracking of heavy feed to make more catalytically cracked products and less thermally cracked products such as butadiene is disclosed. Operating an upflow riser reactor with a riser top temperature of 1050 to 1150 .degree.F., and a short catalyst residence time, yields large volumes of gasoline and light olefins, but reduced yields of butadiene. Preferably cooled catalyst in large amounts contacts severely preheated feed. FCC catalyst with over 30 wt % Y zeolite is preferred.

Inventors: Muldowney; Gregory P. (Glen Mills, PA)

Assignee: Mobil Oil Corporation (Fairfax, VA)

Application Number: 08/001,703

Issued: 1994-06-28

Expired: 2006-06-28

Classes: 208/120.01 ; 208/113; 208/118; 208/120.15; 208/132; 208/159

Field of search: 208/480,157,85,67,120,113,108,73,78,61,114,111,154

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