Hf alkylation and acid rerun process

Claim 1

IN AN ALKYLATION PROCESS WHICH COMPRISES CONTACTING A LOW-BOILING ISOPARAFFIN WITH A LOW-BOILING OLEFIN IN AN ALKYLATION ZONE, PASSING AN EFFLUENT FROM SAID ALKYLATION ZONE TO A SEPARATION ZONE, WITHDRAWING A HYDROCARBON PHASE FROM SAID SEPARATION ZONE, PASSING AT LEAST A PORTION OF SAID HYDROCARBON PHASE TO A FRACTIONATION ZONE, PASSING SAID LOW-BOILING ISOPARAFFIN FROM THE UPPER REGION OF SAID FRACTIONATION ZONE TO SAID ALKYLATION ZONE, WITHDRAWING ALKYLATE FROM THE LOWER REGION OF SAID FRACTIONATION ZONE, HEATING A PORITON OF SAID WITHDRAWN ALKYLATE IN A FIRED REBOILER, PASSING HEATED ALKYLATE FROM SAID FIRED REBOILER INTO THE LOWER REGION OF SAID FRACTIONATIN ZONE, WITHDRAWING AN ACID PHASE FROM SAID SEPARATION ZONE, AND PASSING AT LEAST A PORTION OF SAID WITHDRAWN ACID PHASE TO A REGENERATION ZONE; THE IMPROVEMENT WHICH COMPRISES MEANS POSITIONED WITHIN THE CONVECTION SECTION OF SAID FIRED REBOILER, THEREBY HEATING SAID LOW-BOILING ISOPARAFFIN, PASSING AT LEAST A PORITON OF SAID HEATED LOWBOILING ISOPARAFFIN FROM SAID CONVECTION SECTION INTO THE LOWER REGION OF SAID REGENERATION ZONE, WITHDRAWING THE REMAINDER OF SAID HEATED LOW-BOILING ISOPARAFFIN FROM SAID CONVECTION SECTION AS A PRODUCT STREAM RESPONSIVE TO A MEASUREMENT REPRESENTATIVE OF THE PRESSURE WITHIN SAID CONDIUT MEANS, THEREBY MAINTAINING THE PRESSURE WITHIN SAID CONDIUT MEANS SUBSTANTIALLY CONSTANT, MEASURING A PROPERTY OF SAID HEATED LOW-BOILING ISOPARAFFIN FLOWING FROM SAID CONVECTION SECTION REPRESENTATIVE OF THE TEMPERATURE THEREF, MANIPULATING THE RATE OF FLOW OF SAID LOW-BOILING ISOPARAFFIN TO SAID CONVECTION SECTION RESPONSIVE TO SAID TEMPERATURE MEASUREMENT, PASSING HYDROGEN FLUORIDE AND LOW-BOILING ISOPARAFFIN STREAM FROM THE UPPER REGION OF SAID REGENERATION ZONE TO SAID ALKYLATION ZONE, AND WITHDRAWING FROM SAID REGENERATION ZONE ACIDSOLUBLE OILS.