Quench oil system

Claim 1

THE METHOD OF RECOVERING OLEFINS AND DIOLEFINS FROM THE HOT VAPOROUS EFFLUENT OF A DEHYDROGENATION REACTION, WHICH COMPRISES THE STEPS OF RAPIDLY PRE-QUENCHING SAID EFFLUENT BY DIRECT CONTACT WITH A FIRST SUPPLY OF LIQUID QUENCH OIL WITHIN A PRE-QUENCH ZONE, INTRODUCING THE VAPOROUS AND LIQUID PRE-QUENCH EFLUENT INTO A MAIN QUENCH ZONE, FURTHER COOLING THE PRE-QUENCHED VAPORS BY UPWARD FLOW THROUGH SAID MAIN QUANCH ZONE IN COUNTERCURRENT CONTACT WITH A DESCENDING, PRE-COOLED, SECOND SUPPLY OF LIQUID QUENCH OIL, WITHDRAWING THE COOLED VAPOROUS EFFLUENT OF SAID MAIN QUENCH ZONE, ACCUMULATING BOTH PRE-QUENCH AND MAIN QUENCH OIL AT THE BOTTOM OF SAID MAIN QUANCH ZONE, RECYCLING A FIRST PORTION OF SAID ACCUMULATED OIL FROM SAID MAIN QUANCH ZONE TO SAID PREQUANCH ZONE TO CONSTITUTE SAID FIRST SUPPLY OF QUENCH OIL, WITHDRAWING A SECOND PORTION OF SAID ACCUMULATED OIL FROM SAID MAIN QUENCH ZONE, COOLING ALL BUT A MINOR PART OF SAID SECOND PORTION AND RECYCLING THE COOLED OIL TO SAID MAIN QUANCH ZONE TO CONSTITUTE SAID SECOND SUPPLY OF QUENCH OIL, HEATING SAID MINOR PART OF SAID SECOND PORTION, FLASH VAPORIZING AT LEAST ABOUT HALF BY VOLUME OF SAID HEATED OIL SO AS TO PROVIDE A RELATIVELY HIGH-BOILING LIQUID FRACTION AND A VAPOR FRACTION, INTRODUCING SAID VAPOR FRACTION INTO SAID MAIN QUENCH ZONE AND INTO CONTACT WITH SAID DESCENDING QUENCH OIL, AND DISCHARGING SAID HIGH-BOILING LIQUID FRACTION FROM THE BODY OF CIRCULATING LIQUID COMPRISING SAID SUPPLIES OF QUENCH OIL, THEREBY SELECTIVELY REMOVING FROM SAID BODY THE CONTAMINATING COMPONENTS CONTAINED IN SAID HIGH-BOILING LIQUID FRACTION.

Claim 2

THE METHOD OF RECOVERING OLEFINS AND DIOLEFINS FROM THE HOT VAPOROUS EFFLUENT OF A DEHYDROGENATION REACTION, WHICH COMPRISES THE STEPS OF RAPIDLY PRE-QUENCHING SAID EFFLUENT BY DIRECT CONTACT WITH A FIRST SUPPLY OF LIQUID QUENCH OIL WITHIN A PRE-QUENCH ZONE, INTRODUCING THE VAPOROUS AND LIQUID PRE-QUENCH EFLUENT INTO A MAIN QUENCH ZONE, FURTHER COOLING THE PRE-QUENCHED VAPORS BY UPWARD FLOW THROUGH SAID MAIN QUANCH ZONE IN COUNTERCURRENT CONTACT WITH A DESCENDING, PRE-COOLED, SECOND SUPPLY OF LIQUID QUENCH OIL, WITHDRAWING THE COOLED VAPOROUS EFFLUENT OF SAID MAIN QUENCH ZONE, ACCUMULATING BOTH PRE-QUENCH AND MAIN QUENCH OIL AT THE BOTTOM OF SAID MAIN QUANCH ZONE, RECYCLING A FIRST PORTION OF SAID ACCUMULATED OIL FROM SAID MAIN QUANCH ZONE TO SAID PREQUANCH ZONE TO CONSTITUTE SAID FIRST SUPPLY OF QUENCH OIL, WITHDRAWING A SECOND PORTION OF SAID ACCUMULATED OIL FROM SAID MAIN QUENCH ZONE, COOLING ALL BUT A MINOR PART OF SAID SECOND PORTION AND RECYCLING THE COOLED OIL TO SAID MAIN QUANCH ZONE TO CONSTITUTE SAID SECOND SUPPLY OF QUENCH OIL, HEATING SAID MINOR PART OF SAID SECOND PORTION, FLASH VAPORIZING AT LEAST ABOUT HALF BY VOLUME OF SAID HEATED OIL SO AS TO PROVIDE A RELATIVELY HIGH-BOILING LIQUID FRACTION AND A VAPOR FRACTION, INTRODUCING SAID VAPOR FRACTION INTO SAID MAIN QUENCH ZONE AND INTO CONTACT WITH SAID DESCENDING QUENCH OIL, AND DISCHARGING SAID HIGH-BOILING LIQUID FRACTION FROM THE BODY OF CIRCULATING LIQUID COMPRISING SAID SUPPLIES OF QUENCH OIL, THEREBY SELECTIVELY REMOVING FROM SAID BODY THE CONTAMINATING COMPONENTS CONTAINED IN SAID HIGH-BOILING LIQUID FRACTION.