Automatic control and optimization of a fluidized catalytic cracker

Claim 1

A METHOD FOR AUTOMATICALLY CONTROLLING AND OPTIMIZING THE FLUIDIZED CATALYST CRACKING OF PETROLEUM OILS RESPONSIVE TO CONTROL SIGNALS CALCULATED BY A COMPUTER HAVING A FIXED PROGRAM, COMPRISING: SETTING THE AIR FLOW RATE TO THE CATALYST REGENERATOR AT ITS MAXIMUM VALUE; COMPUTING THE COKE BURNING CAPACITY OF SAID REGENERATOR CORRESPONDING TO SAID MAXIMUM AIR FLOW RATE ACCORDING TO A STOICHIOMETRIC CALCULATION WITHIN SAID FIXED PROGRAM TO GIVE A FIRST COMPUTED MEASUREMENT SIGNAL; COMPUTING THE CONVERSION OF SAID HYDROCARBON MATERIAL FEEDS WITHIN A FLUIDIZED CATALYTIC REACTOR ACCORDING TO A MATERIAL BALANCE CALCULATION WITHIN SAID FIXED PROGRAM; COMPUTING THEREFROM PREDICTIVELY THE RATE OF COKE LAYDOWN IN SAID REACTOR ACCORDING TO A COKE LAYDOWN CALCULATION WITHIN SAID FIXED PROGRAM TO GIVE A SECOND SIGNAL; COMPARING SAID FIRST AND SECOND SIGNAL AND OBTAINING A FIRST CONTROL SIGNAL, THE MAGNITUDE OF WHICH IS RELATED TO THE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; ADJUSTING THE FLOW RATE OF THE