Process and apparatus for vaporizing benzene or light oil

Claim 1

AN IMPROVED STEP OF HOT HYDROGEN GAS VAPORIZATION OF BENZENE FROM A LIQUID HYDROCARBON STARTING MIXTURE CONTAINING CRUDE BENZENE, WHICH MIXTURE HAS POLYMERIZED RESIN FORMING IMPURITIES THEREIN, AS A RESULT OF A PREVIOUS STEP OF A PROCESS BY THERMAL PRETREATMENT UNDER PRESSURE TO POLYMERIZE THE RESIN-FORMING IMPURITIES CONTAINED IN THE CRUDE BENZENE MIXTURE, FOR SEPARATION OF THE RESIN FROM THE CRUDE BENZENE BEFORE IT ENTERS A FURTHER STEP OF THE PROCESS IN WHICH THE BENZENE VAPOR IS TO BE CATALYTICALLY REFINED THEREIN WITH THE HYDROGEN GAS, WHICH IMPROVED PROCESS STEP COMPRISES: SUPPLYING THE AFORESAID LIQUID STARTING MIXTURE FROM SAID PREVIOUS STEP TO A RESERVE THEREOF IN AN EVAPORATING VESSEL, WITHDRAWING A PART OF THE LIQUID STARTING MIXTURE FROM THE EVAPORATING VESSEL AND FLOWING THIS PART WITHOUT CHANGE OF LIQUID PHASE THROUGH A HEATER, THEREAFTER ASPIRATING SAID PART WITH HOT RECYCLED HYDROGEN GAS FROM THE FURTHER CATALYTIC REFINING STEP UNDER LOWER PRESSURE CONDITIONS THAN THE PRESSURE OF THE STARTING LIQUID PASSING TO THE ASPIRATING STEP FROM THE EVAPORATING VESSEL TO THUS VAPORIZE THE STARTING LIQUID, PASSING THE MIXTURE OF RECYCLED HYDROGEN GAS AND VAPORIZED LIQUID INTO THE EVAPORATING VESSEL AT A LEVEL ABOVE THE RESERVE OF LIQUID THEREIN, WHEREBY GASEOUS AND VAPOROUS CONSTITUENTS FLASH FROM THE LIQUID PHASE RESIN CONSTITUENTS OF SAID MIXTURE IN SAID VESSEL, AND FLOWING THE SO SEPARATED GASEOUS AND VAPOROUS CONSTITUENTS FROM THE VESSEL TO SAID FURTHER CATALYTIC REFINING STEP OF THE PROCESS.