Patent ID: 7344635

Claim:
A process for desulfurization of a feedstock containing thiophene and/or thiophenic compounds, said process comprising the following stages: e) in alkylation stage (e) introducing said feedstock into alkylation zone E, and alkylating thiophene and/or thiophenic compounds by at least one olefin, f) fractionating in a fractionation zone F at least a portion of resultant effluent (fraction η′) from alkylation stage e) into at least two fractions: a light fraction (λ) low in sulfur and a heavy fraction (μ) that is high in alkyl thiophenes and in alkyl thiophenic compounds, g) passing at least a portion of the heavy fraction (μ) obtained from fractionation stage f), to a hydrocracking zone G, to hydrocrack alkyl-thiophenes and alkyl-thiophenic compounds contained in said fraction, h) passing of at least a portion of the resultant hydrocracked effluent obtained from hydrocracking zone G, to a hydrotreatment zone H to recover a hydrocracked fraction low in sulfur.