Recent reactors for fluid catalytic cracking (FCC) process are introduced,including two-staged reactors in series, dual-riser reactor,down-flow reactor,multiple-staged feeding reactor,and new structures of the inlet and outlet of the riser reactor.

Aiming at the cracking of reactor feed-in pump axes in Methyl Ethyl Ketone unit,failure analyses were performed by material testing,macro feature observation and micro appearance analyses of cracking surface.