Control of alkylation operation

Claim 3

IN AN ISOPARAFFIN-OLEFIN HYDROCARBON ALKYLATION SYSTEM HAVING FIRST AND SECOND CONDUITS FOR PASSAGE OF THE ISOPARAFFIN HYDROCARBON FEED AND THE OLEFIN HYDROCARBON FEED, RESPECTIVELY SAID CONDUITS JOINING WITH A THIRD CONDUIT LEADING TO AN ALKYLATION CONTACTOR, SAID CONTACTOR BEING PROVIDED WITH A FIFTHE AND OUTLET CONDUIT COMMUNICATING WITH A PHASE SEPARATION VESSEL, THIS VESSEL ALSO BEING PROVIDED WITH A FIFTH AND AOUTLET CONDUIT COMMUNICATING WITH A FRACTIONAL DISTILLATION COLUMN OF LIMITED CAPACITY COMPRISING, IN COMBINATION, A FIRST RATE OF FLOW CONTROLLER IN OPERTIVE COMMUNICATION WITH SAID FIRST CONDUIT A SECOND RATE OF FLOW CONTROLLER IN OPRATIVE COMMUNICATION WITH SAID SECOND CONDUIT, A FIRST RATIO RELAY IN OPERATIVE COMMUNICATION WITH THE FLOW SENSING PORTIONS OF SAID FIRST AND SECOND FLOW CONTROLLERS, SAID FIRST RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID FIRST FLOW CONTROLLER, A FIRST ANALYZER MEANS COMMUNICATING OPERABLY WITH SAID THIRD CONDUIT, SAID FIRST ANALYZER MEANS BEING ADAPTED TO ANALYZE A FLUID SAID THIRD CONDUIT FOR AN OLEFIN HYDROCARBON AND AN ISOPARAFFIN HYDROCARBON, A SECOND RATIO RELAY COMMUNICATING OPERATIVELY WITH SAID FIRST ANALYZER AND BEING ADAPTED TO EMIT A SIGNAL PORPORTIONAL TO THE RATIO OF CONCENTRATIONS OF ISOPARAFFIN TO OLEFIN AS DETERMINED BY SAID FIRST ANALYZER, SAID SECOND RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID SECOND FLOW CONTROLLER TO RESET SAME, A SECOND ANALYZER MEANS COMMUNICATING OPERATIVELY WITH SAID FIFTH CONDUIT SAID SECOND ANALYZER MEANS BEING ADAPTED TO ANALYZE A FLUID FROM SAID FIFTH CONDUIT FOR SAID ISOPARAFFIN HYDROCARBON, FIRST AND SECOND DENSITY INDICATING MEANS OPERATIVELY COMMUNICATING WITH SAID THIRD AND FIFTH CONDUITS, RESPECTIVELY, SAID FIRST AND SECOND DENSITY INDICATING MEANS BEING ADAPTED TO EMIT SIGNALS PROPORTIONAL TO THE DENSITY OF FLUIDS FLOWING THROUGH SAID THIRD AND FIFTH CONDUITS, REPSECTIVELY, A THIRD RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID FIRTH AND SECOND DENSITY SENSING MEANS AND BEING ADAPTED TO EMIT A SINGLA PROPORTIONAL TO THE RATION OF THE DENSITY INDICATED BY THE FIRST DENSITY SENSING MEANS TO THE DENSITY INDICATED BY THE SECOND DENSITY SENSING MEANS, A MULTIPLIER MEANS OPERATIVELY COMMUNICATING WITH SAID THIRD RATI RELAY AND WITH SAID SECOND ANALYZER AND BEING ADAPTED TO EMIT A SIGNAL PORPORITONAL TO THE PRODUCT OF THE SIGNALS FROM SAID SECOND RATIO RELAY AND SAID SECOND ANALYZER, A SUBTRACTING RELAY OPERATIVELY COMMUNICATING WITH SAID FIRST ANALYZER AND WITH SAID MULTIPLIER MEANS AND BEING ADAPTED TO EMIT A SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEENSIGNALS FROM SAID FIRST ANALYZER AND SAID MULTIPLIER, SAID SUBTRACTING RELAY ASLO OPERATIVELY COMMUNICATING WITH SAID FIRST RATIO REALY AND BEING ADAPTED TO RESET THE SETPOINT OF SAID FIRST RATIO RELAY, A SIXTH CONDUIT LEADING FROM SAID FRACTIONAL DISTILLATION COLUMN TO SAID THIRD CONDUIT FOR RECYCLE OF ISOPARAFFIN, A SEVENTH CONDUIT LEADING FROM SAID FIRST CONDUIT TO SAID THIRD CONDUIT AT A POINT INTERMEDIATE THE JUNCTURE OF SAID FIRST AND SECOND CONDUITS WITH SAID THIRD CONDUIT AND THE POINT OF COMMUNICATION OF SAID FIRST CONDUIT WITH THE THIRD CONDUIT, A THIRD RATE OF FLOW CONTROLLER OPERATIVELY IN SAID FIFTH CONDUIT AND A THROTTLE VAVLE COMATIVELY IN SAID SEVENTH CONDUIT, SAID THROTTLE VALVE COMMUNICATING OPERATIVELY WITH THE FLOW SENSING PORTION OF SAID THIRD RATE OF FLOW CONTROLLER AND BEING ADAPTED TO OPEN IN REPSONSE TO A DECRESE OF FLUID FLOW IN SAID FIFTH CONDUIT AND TO THROTTLE SAID VALVE IN RESPONSE TO AN INCREASE TO FLUID FLOW IN SAID FIFTH CONUIT BELOW THE FLOW CORRESPONDING TO SAID LIMITED CAPACITY OF SAID DISTILATION COLUMN AS SENSED BY THE FLOWING SENSING PORTION OF SAID THIRD RATE OF FLOW CONTROLLER.

Claim 4

IN AN ISOPARAFFIN-OLEFIN HYDROCARBON ALKYLATION SYSTEM HAVING FIRST AND SECOND CONDUITS FOR PASSAGE OF THE ISOPARAFFIN HYDROCARBON FEED AND THE OLEFIN HYDROCARBON FEED, RESPECTIVELY SAID CONDUITS JOINING WITH A THIRD CONDUIT LEADING TO AN ALKYLATION CONTACTOR, SAID CONTACTOR BEING PROVIDED WITH A FIFTHE AND OUTLET CONDUIT COMMUNICATING WITH A PHASE SEPARATION VESSEL, THIS VESSEL ALSO BEING PROVIDED WITH A FIFTH AND AOUTLET CONDUIT COMMUNICATING WITH A FRACTIONAL DISTILLATION COLUMN OF LIMITED CAPACITY COMPRISING, IN COMBINATION, A FIRST RATE OF FLOW CONTROLLER IN OPERTIVE COMMUNICATION WITH SAID FIRST CONDUIT A SECOND RATE OF FLOW CONTROLLER IN OPRATIVE COMMUNICATION WITH SAID SECOND CONDUIT, A FIRST RATIO RELAY IN OPERATIVE COMMUNICATION WITH THE FLOW SENSING PORTIONS OF SAID FIRST AND SECOND FLOW CONTROLLERS, SAID FIRST RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID FIRST FLOW CONTROLLER, A FIRST ANALYZER MEANS COMMUNICATING OPERABLY WITH SAID THIRD CONDUIT, SAID FIRST ANALYZER MEANS BEING ADAPTED TO ANALYZE A FLUID SAID THIRD CONDUIT FOR AN OLEFIN HYDROCARBON AND AN ISOPARAFFIN HYDROCARBON, A SECOND RATIO RELAY COMMUNICATING OPERATIVELY WITH SAID FIRST ANALYZER AND BEING ADAPTED TO EMIT A SIGNAL PORPORTIONAL TO THE RATIO OF CONCENTRATIONS OF ISOPARAFFIN TO OLEFIN AS DETERMINED BY SAID FIRST ANALYZER, SAID SECOND RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID SECOND FLOW CONTROLLER TO RESET SAME, A SECOND ANALYZER MEANS COMMUNICATING OPERATIVELY WITH SAID FIFTH CONDUIT SAID SECOND ANALYZER MEANS BEING ADAPTED TO ANALYZE A FLUID FROM SAID FIFTH CONDUIT FOR SAID ISOPARAFFIN HYDROCARBON, FIRST AND SECOND DENSITY INDICATING MEANS OPERATIVELY COMMUNICATING WITH SAID THIRD AND FIFTH CONDUITS, RESPECTIVELY, SAID FIRST AND SECOND DENSITY INDICATING MEANS BEING ADAPTED TO EMIT SIGNALS PROPORTIONAL TO THE DENSITY OF FLUIDS FLOWING THROUGH SAID THIRD AND FIFTH CONDUITS, REPSECTIVELY, A THIRD RATIO RELAY OPERATIVELY COMMUNICATING WITH SAID FIRTH AND SECOND DENSITY SENSING MEANS AND BEING ADAPTED TO EMIT A SINGLA PROPORTIONAL TO THE RATION OF THE DENSITY INDICATED BY THE FIRST DENSITY SENSING MEANS TO THE DENSITY INDICATED BY THE SECOND DENSITY SENSING MEANS, A MULTIPLIER MEANS OPERATIVELY COMMUNICATING WITH SAID THIRD RATI RELAY AND WITH SAID SECOND ANALYZER AND BEING ADAPTED TO EMIT A SIGNAL PORPORITONAL TO THE PRODUCT OF THE SIGNALS FROM SAID SECOND RATIO RELAY AND SAID SECOND ANALYZER, A SUBTRACTING RELAY OPERATIVELY COMMUNICATING WITH SAID FIRST ANALYZER AND WITH SAID MULTIPLIER MEANS AND BEING ADAPTED TO EMIT A SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEENSIGNALS FROM SAID FIRST ANALYZER AND SAID MULTIPLIER, SAID SUBTRACTING RELAY ASLO OPERATIVELY COMMUNICATING WITH SAID FIRST RATIO REALY AND BEING ADAPTED TO RESET THE SETPOINT OF SAID FIRST RATIO RELAY, A SIXTH CONDUIT LEADING FROM SAID FRACTIONAL DISTILLATION COLUMN TO SAID THIRD CONDUIT FOR RECYCLE OF ISOPARAFFIN, A SEVENTH CONDUIT LEADING FROM SAID FIRST CONDUIT TO SAID THIRD CONDUIT AT A POINT INTERMEDIATE THE JUNCTURE OF SAID FIRST AND SECOND CONDUITS WITH SAID THIRD CONDUIT AND THE POINT OF COMMUNICATION OF SAID FIRST CONDUIT WITH THE THIRD CONDUIT, A THIRD RATE OF FLOW CONTROLLER OPERATIVELY IN SAID FIFTH CONDUIT AND A THROTTLE VAVLE COMATIVELY IN SAID SEVENTH CONDUIT, SAID THROTTLE VALVE COMMUNICATING OPERATIVELY WITH THE FLOW SENSING PORTION OF SAID THIRD RATE OF FLOW CONTROLLER AND BEING ADAPTED TO OPEN IN REPSONSE TO A DECRESE OF FLUID FLOW IN SAID FIFTH CONDUIT AND TO THROTTLE SAID VALVE IN RESPONSE TO AN INCREASE TO FLUID FLOW IN SAID FIFTH CONUIT BELOW THE FLOW CORRESPONDING TO SAID LIMITED CAPACITY OF SAID DISTILATION COLUMN AS SENSED BY THE FLOWING SENSING PORTION OF SAID THIRD RATE OF FLOW CONTROLLER.