Process for disengaging solid and gaseous particles in FCC processes with reduced coke formation in disengager vessels

An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclones fitted with external collector pipes , is described. The collector pipes optimize the purge of gases coming from the disengager vessel , reducing the time the hydrocarbons remain inside the disengager vessel , thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipes prevents release of the disengaged catalyst into cyclones in subsequent stages. The present invention also relates to a process and device for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes, reducing coke formation in disengager vessels and minimizing the release of catalyst into consecutive stages, said process and device being part of the system of the present invention.