Patent ID: 7967897

Claim:
System for the separation of suspensions of spent catalysts and hydrocarbons formed in a fluid catalytic cracking unit with multiple ascending flow reaction tubes, characterised in that it consists of: a) Interconnections between each of the ascending flow reaction tubes ( 2 , 3 , 15 , 16 ) and the separator vessel ( 1 ) consisting of two sections connected to one another, the first inclined section ( 4 , 5 , 17 , 18 ) beginning at the upper end of the ascending flow reaction tubes ( 2 , 3 , 15 , 16 ), forming an acute angle with them, and enclosing the top of the outer part of the second vertical section ( 6 ) of the interconnection, which penetrates into the centre of the upper cover of the separator vessel ( 1 ) and which has a regulatable opening device, connected at its lower end, for the draining of the part of the spent catalyst separated from the suspensions; b) Cyclones without sealing legs ( 8 ), located in the interior of the separator vessel ( 1 ), connected directly to the walls of the lower third of the said second vertical section ( 6 ) of the interconnections described in a); and c) Conventional cyclones of the first stage ( 9 ), also located in the interior of the separator vessel ( 1 ), connected to the cyclones without sealing legs ( 8 ) described in b) by way of two overhead ducts for the outlet of gases and the sealing legs ( 11 ) of which, provided or not with controlling devices for the retention of solids, extend or not as far as the interior of the fluidized bed ( 12 ) located in the separator vessel ( 1 ).