| abstract |
PROCESS FOR HYDROTREATMENT OF A HEAVY FRACTION OF HYDROCARBONS CONTAINING METAL IMPURITIES. IT IS OPERATED IN AT LEAST TWO STAGES: A FIRST STAGE USING A CATALYST CONTAINING, IN LOW PROPORTION, AT LEAST ONE METAL FROM GROUPS V, VI AND OR VIII AND IN THE FORM OF A PLURALITY OF JUXTAPOSED AGGLOMERATES EACH FORM OF A PLURALITY OF ACICULAR PLATELETS, THE PLATELETS OF EACH AGGLOMERATE BEING GENERALLY RADIALLY ORIENTED IN RELATION TO THE OTHERS AND IN RELATION TO THE CENTER OF THE AGGLOMERATE, THE SUPPORT OF THIS CATALYST BEING PREFERABLY INERT, AND A SECOND AND USING A CATALYST OF WHICH SAME TYPE BUT IN WHICH THE METAL CONTENT IS HIGHER. APPLICATION TO HEAVY CRUDE OILS, OIL DISTILLATION RESIDUES, ASPHALT OILS, ASPHALT DILUTED IN AROMATIC DISTILLATE AND COAL LIQUEFIATES. |