| 摘要 |
Sulfur species present in cracked naphtha (1) are converted and removed by first passing the naphtha (1) over an acid catalyst in an alkylation reactor (4) to alkylate the thiophenic compounds in the naphtha using the olefins, i.e., monoolefins and diolefins, present in the naphtha (1) as alkylating agent. Alkylated thiophenes are concentrated in the heavy portion of the naphtha (8) by distillation, reducing the amount of naphtha that needs to be hydrodesulfurized in the reactor (10). Olefins in cracked naphtha are concentrated in the light portion of the naphtha (7) which is not subsequently hydrotreated. Thus, octane and hydrogen consumption penalties associated with hydrotreating are minimized. |
