Control of stripping still and dephlegmator operation

Claim 1

A METHOD FOR OPERATING A RICH ABSORPTION OIL DISTILLATION AND DEPHLEGMATOR SYSTEM, COMPRISING, INTRODUCING AN ABSORPTION OIL RICH IN GASOLINE BOILING RANGE HYDROCARBONS INTO A DISTILLATION ZONE, INTRODUCING STRIPPING STEAM INTO SAID ZONES AND THEREIN DISTILLING ABSODBED HYDROCARBONS AND LOW BOILING ENDS OF SAID ABSORPTION OIL FROM THE REMAINDER OF THE ABSORPTION OIL THEREBY PRODUCING OVERHEAD VAPORS FROM SAID DISTILLATION ZONE, INTRODUCING SAID OVERHEAD VAPORS INTO A DEPHLEGMATION ZONE, INTRODUCING COOLING WATER INTO THE UPPER PORTION OF SAID DEPHLEGMATION ZONE AND IN SAID DEPHLEGMATION ZONE COOLING SAID VAPORS BY DIRECT HEAT EXCHANGE WITH SAID COOLING WATER WHEREBY AT LEAST A PORTION OF THE HIGH BOILING ENDS OF SAID VAPORS CONDENSE TO PRODUCE A DEPHLEGMATOR OIL, WITHDRAWING HEAT EXCHANGED WATER FROM THE BOTTOM OF SAID DEPHLEGMATION ZONE, COOLING THE WITHDRAWN WATER TO PRODUCE THE FIRST MENTIONED COOLING WATER, WITHDRAWING SAID