champagnat ctau

Claim 1

A PROCESS FOR THE EXTRACTIVE CRYSTALLIZATION OF A HYDROCARBON MIXTURE CONTAINING ONLY IN PART HYDROCARBONS CAPABLE OF FORMING UREA ADDUCT WHICH COMPRISES TREATING SAID HYDROCARBON MIXTURE WITH A SOLUTION COMPRISING UREA WHEREBY THERE IS FORMED AN EMULSION CONSISTING OF A LIQUID PHASE COMPRISING A UREA ADDUCTION RAFFINATE AND A LIQUID PHASE COMPRISING UREA SOLUTION, SAID EMULSION CONTAINING A SOLID PHASE IN SUSPENSION, SAID SOLID PHASE COMPRISING A CRYSTALLINE UREA ADDUCT, STIRRING THE MIXTURE BY CAUSING A STREAM OF BUBBLES OF AN INERT GAS TO PASS THERETHROUGH, WHEREBY THERE IS FORMED AN UPPER LIQUID PHASE COMPRISING RAFFINATE AND WHEREBY THE SOLID MATERIALS PASS INTO THE LOWER LIQUID PHASE COMPRISING UREA SOLUTION, SEPARATING HYDROCARBONS FROM THE SOLID CENTATION AND RECOVERING HYDROCARBONS FROM THE SOLID UREA ADDUCT CONTAINED IN THE REMAINING LIQUID PHASE.