Propane deasphalting of crude residua of hydrocarbon oil
阅读：872发布：2020-11-19
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1. IN THE PROPANE DEASPHALTING OF CRUDE HYDROCARBON OIL RESIDUA HAVING ASPHALT THEREIN, THE PROCESS OF RECOVERING PROPANE FROM A LIQUID MIXTURE OF PROPANE DEASPHALTED OIL AND PROPANE AND SUPPRESSING FOAMING ENCOUNTERED IN SAID PROCESS WHICH COMPRISES HEATING SAID MIXTURE IN A HEATING ZONE TO SUBSTANTIALLY 220* F. AT WHICH TEMPERATURE A PORTION OF THE PROPANE THEREIN IS VAPORIZED, PASSING VAPOR AND HEATED LIQUID FROM THE HEATING ZONE INTO A DISTILLING ZONE, FLOWING LIQUID FROM THE DISTILLING ZONE TO ANOTHER HEATING ZONE WHEREIN SAID LIQUID IS HEATED TO SUBSTANTIALLY 320* F. AT WHICH TEMPERATURE MORE OF THE PROPANE IN THE LIQUID IS VAPORIZED, FLOWING RESIDUE LIQUID AND VAPOR FROM SAID OTHER HEATING ZONE INTO A LOWER PART OF THE DISTILLING ZONE, SUPERHEATING SAID VAPOR IN THE DISTILLING ZONE BY SPRAYING A PORTION OF SAID RESIDUE LIQUID HEATED TO SUBSTANTIALLY 320* F. INTO CONTACT AND DIRECT HEAT EXCHANGE RELATIONSHIP WITH SAID VAPOR IN AN UPPER PART OF THE DISTILLING ZONE TO CAUSE SUPPRESSION OF FOAMING IN THE LATTER, AND WITHDRAWING VAPOR FROM THE DISTILLING ZONE AFTER SAID VAPOR HAS PASSED IN HEAT EXCHANGE RELATIONSHIP WITH THE RESIDUE LIQUID.
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