REJUVENATION AND/OR CLEANING OF CATALYSTS

摘要

ONE ASPECT OF THE INVENTION PROVIDES A REJUVENATING AND/OR CLEANING COMPOSITION FOR A CATALYST OF A VEHICLE CATALYTIC CONVERTER, COMRPRISING AT LEAST ONE HYDROCARBON SOURCE AND AT LEAST ONE OXYGEN DONOR. THE INVENTIVE COMPOSITION CAN ALSO COMPRISE A HYDROCARBON SOURCE AND AN OXYGEN DONOR WHEREIN SAID COMPOSITION GENERATES AN ORGANIC ACID VAPOUR ON COMBUSTION. PREFERABLY, THE INVENTIVE COMPOSITIONS COMPRISE ONE OR MORE ORGANIC SOLVENTS SELECTED FROM ISOPROPYL ALCOHOL, ACETONE, XYLENE AND PARAFFIN (KEROSENE). THE INVENTION ALSO PROVIDES A METHOD OF REJUVENATING AND/OR CLEANING A CATALYST IN A VEHICLE CATALYTIC CONVERTER, IN SITU, IN A VEHICLE I.E. WITHOUT REMOVAL OF THE CATALYST FROM THE VEHICLE, SAID METHOD COMPRISING;I) BRINGING THE CATALTIC CONVERTER UP TO WORKING TEMPERATURE; AND THENII) PASSING THE AFOREMENTIONED COMPOSITIONS INTO AN ENGINE OF THE VEHICLE WHILST RUNNING THE ENGINE AT IDLE. A SIMILAR METHOD COMPRISES:I) BRINGING THE VEHICLE ENGINE TO WORKING TEMPERATURE; II) DISCONNECTING THE VEHICLE''S FUEL LINE FROM THE ENGINE; III) CONNECTING THE ENGINE TO A MEANS FOR FEEDING ANY REJUVENATING AND/OR CLEANING COMPOSITION THERETO; AND IV) FEEDING THE CLEANING COMPOSITION INTO THE ENGINE WHILST THE ENGINE IS RUNNING AT A TEMPERATURE HIGH ENOUGH TO EFFECT CLEANING OF THE CATALYST. THE ATMOSPHERE. ANOTHER ASPECT OF THE INVENTION PROVIDES A METHOD OF REJUVENATING AND/OR CLEANING A CATALYST OF A VEHICLE CATALYTIC CONVERTER WITHOUT REMOVAL OF THE CATALYST FROM THE VEHICLE, THE VEHICLE HAVING AN ENGINE AND A FUEL TANK, SAID METHOD COMPRISING THE STEPS OF:I) INTRODUCING THE CLEANING COMPOSITION INTO THE FUEL TANK, SAID TANK ALREADY CONTAINING A QUANTITY OF FUEL; AND THENII) RUNNING THE ENGINE OF THE VEHICLE TO EFFECT CLEANING OF THE CATALYST.