Patent ID: 8551900

Claim:
A method for preparation of an adsorbent that comprises the following successive stages: A) A stage A shaping a faujasite-type zeolite powder A by co-granulation with a powder B that consists essentially of alumina, whereby the ratio per unit of mass of the powder A in the mixture of powders A and B is between 10 and 70%, B) A stage B treating under water vapor of the adsorbent that is obtained at the end of stage A at a temperature of between 40 and 200° C., for a duration of 1 to 12 hours, C) A stage C drying the adsorbent that is obtained at the end of stage B at a temperature of between 100 and 300° C. for a duration of 0.5 to 12 hours, whereby the resultant absorbent is suitable for absorbing organic contaminants that contain at least one heteroatom and that are present in an olefinic feedstock that comprises at least 50% by volume of hydrocarbons, said hydrocarbons comprising 2 to 12 carbon atoms.