FCC is an abbreviation for fluid catalytic cracking, a process for cleaning crude oil at oil refineries. FCC catalyst is being used to catalyse oil, which basically means that heavy metals stick to FCC catalyst and are taken out of the oil. Gasoline, petroleum, kerosene, gas oil and motor oil are being made out of the catalysed oil. FCC catalyst is the cleaning agent in this process and later on it is the residual. We call the output ‘spent FCC catalyst’. The spent FCC contains a large amount of Aluminium oxide, which can be used as an alternative raw material. The spent FCC catalyst is used in the steel industry and by cement and stonewool producers.