Patent ID: 8809612

Claim:
A method for absorption of contaminants, comprising contacting an olefinic feedstock containing at least 50% by weight of hydrocarbons and containing organic contaminants having at least one oxygen, nitrogen or sulfur atom with an adsorbent prepared by a process that comprises: 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) treating under water vapor of an adsorbent that is obtained at the end of A at a temperature of between 40 and 200° C., for a duration of 30 minutes to 24 hours, C) drying the adsorbent that is obtained at the end of B at a temperature of between 100 and 300° C. for a duration of 0.5 to 12 hours.