Fluid catalytic cracking (FCC) is a process technology for converting heavy oils into more valuable gasoline and lighter products with a powdered catalyst.


A number of kinds of advanced process technologies are required in the design and construction of (residue) fluid catalytic cracking(R)FCC equipment. In the reactior, the feed oil is injected and contacted with the catalyst in a fluidized state to convert into C3-C4 olefin and gasoline fraction. The cracked oils are is serially separated into products in the downstream distillation towers. The propylene splitter unit for producing propylene and the cracked gasoline desulfurization unit are also installed in some cases.
The catalyst used in the reaction is circulated back to the reactor after burning off the coke remained on the catalyst particle in the regenerator by air to maintain its activity. The high-temperature energy from the regenerator flue gas is recovered by a flue gas expander as the form of mechanical energy and by the steam generator as the form of heat, and the NOx and SOx in the flue gas are reduced to meet the environmental regulations before venting from stack.

Typical process flow of (R)FCC

Typical process flow of (R)FCC

Features and benefits of FCC

RFCC unit for Kyokuto Petroleum Industries, Ltd.RFCC unit for Kyokuto Petroleum
Industries, Ltd.

(R)FCC unit catalytically converts heavy oils into more valuable gasoline and lighter products. The technology enables the effective utilization of the crude oils. In recent years, the installation of residue FCC (RFCC) process technology has increased as the heart of modern refinery for upgrading heavy oil by feeding atmospheric residue oils or vacuum residue oils. TOYO has extensive experience with licensed processes of UOP, AXENS, KBR, Lummus, PETROBRAS and others, and has designed and constructed over twelve FCC and RFCC units both within Japan and abroad.

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