Alkylation process control method

Claim 1

IN AN ALKYLATION PROCESS WHICH COMPRISES PASSING A STREAM CONTAINING AN OLEFIN HAVING 3-5 CARBON ATOMS PER MOLECULE TO AN ALKYLATION ZONE CONTAINING AN ALKYLATION CATALYST, PASSING A STREAM CONTAINING AN ISOPAARAFFIN SELECTED FROM THE GROUP CONSISTING OF ISOBUTANE AND ISOPENTANE TO SAID ALKYLATIN ZONE, SEPARATING AN ALKYLATION ZONE HYDROCARBON EFFLUENT FROM SAID ALKYLATING CATALYST, PASSING AT LEAST A PORTION OF SAID ALKYLATING CATALYST, CARBON EFFLUENT TO A FRACTIONATION ZONE, WITHDRAWING AN ALKYLATE FRACTION FROM SAID FRACTIONATION ZONE, AND PASSING A FRACTION CONTAINING AN ISOPARAFFIN FROM SAID FRACTTIONATION ZONE TO SAID ALKYLATION ZONE; A METHOD OF CONTROL WHICH COMPRISES MEASURING AT LEAST ONE PORPERTY OF SAID OLEFIN STREAMF PASSED TO SAID ALKYLATIN ZONE REPRESENTATIVE OF THE RATE OF FLOW OF PROPANE CONTAINED THEREIN, MEASURING AT LEAST ONE PROPERTY OF THE SSOPARAFFIN FEED TO SAID ALKYLATIN ZONE REPRESENTATIVE OF THE RATE OF FLOW OF PROPANE CONTAINED THEREIN, AND MANIPULATING THE RATE OF FLOW SAID ALKYLATIN ZONE HYDROCARBON EFFLUENT TO A DEPROPANIZING ZONE RESPONSIVE TO THE TOTAL RATE OF FLOW OF PROPANE TO SAID ALKYLATION ZONE.